mirror of
https://github.com/holub/mame
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accomm: Bus factor reduction. Keyboard now reads, but matrix doesn't match Electron. (nw)
This commit is contained in:
arbee
parent
9546051bc0
commit
3738996aee
@ -1,10 +1,11 @@
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// license:BSD-3-Clause
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// license:BSD-3-Clause
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// copyright-holders:R. Belmont
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// copyright-holders:R. Belmont, Wilbert Pol
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/***************************************************************************
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/***************************************************************************
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Acorn Communicator
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Acorn Communicator
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Skeleton driver by R. Belmont
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Driver-in-progress by R. Belmont
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Electron ULA emulation by Wilbert Pol
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Main CPU: 65C816
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Main CPU: 65C816
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Other chips: 6850 UART, 6522 VIA, SAA5240(video?), AM7910 modem, PCF0335(?)
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Other chips: 6850 UART, 6522 VIA, SAA5240(video?), AM7910 modem, PCF0335(?)
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@ -19,6 +20,44 @@
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#include "screen.h"
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#include "screen.h"
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#include "speaker.h"
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#include "speaker.h"
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/* Interrupts */
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#define INT_HIGH_TONE 0x40
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#define INT_TRANSMIT_EMPTY 0x20
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#define INT_RECEIVE_FULL 0x10
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#define INT_RTC 0x08
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#define INT_DISPLAY_END 0x04
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#define INT_SET 0x100
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#define INT_CLEAR 0x200
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/* ULA context */
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struct ULA
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{
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uint8_t interrupt_status;
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uint8_t interrupt_control;
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uint8_t rompage;
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uint16_t screen_start;
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uint16_t screen_base;
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int screen_size;
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uint16_t screen_addr;
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uint8_t *vram;
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int current_pal[16];
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int communication_mode;
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int screen_mode;
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int cassette_motor_mode;
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int capslock_mode;
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// int scanline;
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/* tape reading related */
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uint32_t tape_value;
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int tape_steps;
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int bit_count;
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int high_tone_set;
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int start_bit;
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int stop_bit;
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int tape_running;
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uint8_t tape_byte;
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};
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class accomm_state : public driver_device
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class accomm_state : public driver_device
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{
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{
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public:
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public:
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@ -26,15 +65,22 @@ public:
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: driver_device(mconfig, type, tag),
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: driver_device(mconfig, type, tag),
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m_maincpu(*this, "maincpu"),
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m_maincpu(*this, "maincpu"),
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m_bank0dev(*this, "bank0dev"),
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m_bank0dev(*this, "bank0dev"),
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m_vram(*this, "vram")
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m_vram(*this, "vram"),
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m_keybd(*this, "LINE.%u", 0)
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{ }
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{ }
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virtual void machine_reset() override;
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virtual void machine_reset() override;
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virtual void machine_start() override;
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virtual void machine_start() override;
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uint32_t screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
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uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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DECLARE_WRITE8_MEMBER(b0_rom_disable_w);
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DECLARE_WRITE8_MEMBER(b0_rom_disable_w);
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DECLARE_READ8_MEMBER(read_keyboard);
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DECLARE_READ8_MEMBER(sheila_r);
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DECLARE_WRITE8_MEMBER(sheila_w);
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DECLARE_PALETTE_INIT(accomm);
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INTERRUPT_GEN_MEMBER(vbl_int);
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protected:
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protected:
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@ -42,21 +88,88 @@ protected:
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required_device<g65816_device> m_maincpu;
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required_device<g65816_device> m_maincpu;
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required_device<address_map_bank_device> m_bank0dev;
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required_device<address_map_bank_device> m_bank0dev;
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required_shared_ptr<uint8_t> m_vram;
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required_shared_ptr<uint8_t> m_vram;
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required_ioport_array<14> m_keybd;
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// driver_device overrides
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// driver_device overrides
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virtual void video_start() override;
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virtual void video_start() override;
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void interrupt_handler(int mode, int interrupt);
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inline uint8_t read_vram( uint16_t addr );
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inline void plot_pixel(bitmap_ind16 &bitmap, int x, int y, uint32_t color);
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private:
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ULA m_ula;
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int m_map4[256];
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int m_map16[256];
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};
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};
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static const rgb_t electron_palette[8]=
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{
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rgb_t(0x0ff,0x0ff,0x0ff),
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rgb_t(0x000,0x0ff,0x0ff),
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rgb_t(0x0ff,0x000,0x0ff),
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rgb_t(0x000,0x000,0x0ff),
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rgb_t(0x0ff,0x0ff,0x000),
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rgb_t(0x000,0x0ff,0x000),
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rgb_t(0x0ff,0x000,0x000),
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rgb_t(0x000,0x000,0x000)
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};
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PALETTE_INIT_MEMBER(accomm_state, accomm)
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{
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palette.set_pen_colors(0, electron_palette, ARRAY_LENGTH(electron_palette));
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}
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READ8_MEMBER(accomm_state::read_keyboard)
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{
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uint8_t data = 0;
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//logerror( "PC=%04x: keyboard read from paged rom area, address: %04x", activecpu_get_pc(), offset );
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for (int i = 0; i < 14; i++)
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{
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if (!(offset & 1))
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data |= m_keybd[i]->read() & 0x0f;
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offset = offset >> 1;
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}
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//logerror( ", data: %02x\n", data );
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return data;
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}
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INTERRUPT_GEN_MEMBER(accomm_state::vbl_int)
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{
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interrupt_handler( INT_SET, INT_DISPLAY_END );
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}
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void accomm_state::machine_reset()
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void accomm_state::machine_reset()
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{
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{
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m_ula.communication_mode = 0x04;
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m_ula.screen_mode = 0;
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m_ula.cassette_motor_mode = 0;
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m_ula.capslock_mode = 0;
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m_ula.screen_start = 0x3000;
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m_ula.screen_base = 0x3000;
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m_ula.screen_size = 0x8000 - 0x3000;
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m_ula.screen_addr = 0;
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m_ula.tape_running = 0;
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m_ula.interrupt_status = 0x82;
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m_ula.interrupt_control = 0;
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m_ula.vram = (uint8_t *)m_vram.target() + m_ula.screen_base;
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}
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}
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void accomm_state::machine_start()
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void accomm_state::machine_start()
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{
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{
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m_ula.interrupt_status = 0x82;
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m_ula.interrupt_control = 0x00;
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}
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}
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void accomm_state::video_start()
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void accomm_state::video_start()
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{
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{
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int i;
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for( i = 0; i < 256; i++ ) {
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m_map4[i] = ( ( i & 0x10 ) >> 3 ) | ( i & 0x01 );
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m_map16[i] = ( ( i & 0x40 ) >> 3 ) | ( ( i & 0x10 ) >> 2 ) | ( ( i & 0x04 ) >> 1 ) | ( i & 0x01 );
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}
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}
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}
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WRITE8_MEMBER(accomm_state::b0_rom_disable_w)
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WRITE8_MEMBER(accomm_state::b0_rom_disable_w)
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@ -64,51 +177,379 @@ WRITE8_MEMBER(accomm_state::b0_rom_disable_w)
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m_bank0dev->set_bank(1);
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m_bank0dev->set_bank(1);
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}
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}
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uint32_t accomm_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
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inline uint8_t accomm_state::read_vram(uint16_t addr)
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{
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{
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uint32_t *scanline;
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return m_ula.vram[ addr % m_ula.screen_size ];
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int x, y;
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}
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uint8_t pixels;
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static const uint32_t palette[2] = { 0, 0xffffff };
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uint8_t *vram = (uint8_t *)m_vram.target();
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uint32_t ula_addr = 0;
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vram += 0x3000;
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inline void accomm_state::plot_pixel(bitmap_ind16 &bitmap, int x, int y, uint32_t color)
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{
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bitmap.pix16(y, x) = (uint16_t)color;
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}
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for (y = 0; y < 256; y++)
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uint32_t accomm_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
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{
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int i;
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int x = 0;
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int pal[16];
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int scanline = screen.vpos();
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rectangle r = cliprect;
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r.min_y = r.max_y = scanline;
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if (scanline == 0)
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{
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{
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scanline = &bitmap.pix32(y);
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m_ula.screen_addr = m_ula.screen_start - m_ula.screen_base;
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for (x = 0; x < 80; x++)
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}
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{
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pixels = vram[ula_addr + (x << 3)];
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*scanline++ = palette[(pixels>>7)&1];
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/* set up palette */
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*scanline++ = palette[(pixels>>6)&1];
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switch( m_ula.screen_mode )
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*scanline++ = palette[(pixels>>5)&1];
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{
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*scanline++ = palette[(pixels>>4)&1];
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case 0: case 3: case 4: case 6: case 7: /* 2 colour mode */
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*scanline++ = palette[(pixels>>3)&1];
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pal[0] = m_ula.current_pal[0];
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*scanline++ = palette[(pixels>>2)&1];
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pal[1] = m_ula.current_pal[8];
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*scanline++ = palette[(pixels>>1)&1];
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break;
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*scanline++ = palette[(pixels&1)];
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case 1: case 5: /* 4 colour mode */
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}
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pal[0] = m_ula.current_pal[0];
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ula_addr++;
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pal[1] = m_ula.current_pal[2];
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pal[2] = m_ula.current_pal[8];
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pal[3] = m_ula.current_pal[10];
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break;
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case 2: /* 16 colour mode */
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for( i = 0; i < 16; i++ )
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pal[i] = m_ula.current_pal[i];
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}
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if ((y & 7) == 7)
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/* draw line */
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switch( m_ula.screen_mode )
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{
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case 0:
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for( i = 0; i < 80; i++ )
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{
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{
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ula_addr += 0x278;
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uint8_t pattern = read_vram( m_ula.screen_addr + (i << 3) );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>7)& 1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>6)& 1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>5)& 1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>4)& 1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>3)& 1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>2)& 1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>1)& 1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>0)& 1] );
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}
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}
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m_ula.screen_addr++;
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if ( ( scanline & 0x07 ) == 7 )
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m_ula.screen_addr += 0x278;
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break;
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case 1:
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for( i = 0; i < 80; i++ )
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{
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uint8_t pattern = read_vram( m_ula.screen_addr + i * 8 );
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plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>3]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>3]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>2]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>2]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>1]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>1]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>0]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>0]] );
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}
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m_ula.screen_addr++;
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if ( ( scanline & 0x07 ) == 7 )
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m_ula.screen_addr += 0x278;
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break;
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case 2:
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for( i = 0; i < 80; i++ )
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{
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uint8_t pattern = read_vram( m_ula.screen_addr + i * 8 );
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plot_pixel( bitmap, x++, scanline, pal[m_map16[pattern>>1]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map16[pattern>>1]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map16[pattern>>1]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map16[pattern>>1]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map16[pattern>>0]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map16[pattern>>0]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map16[pattern>>0]] );
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plot_pixel( bitmap, x++, scanline, pal[m_map16[pattern>>0]] );
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}
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m_ula.screen_addr++;
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if ( ( scanline & 0x07 ) == 7 )
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m_ula.screen_addr += 0x278;
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break;
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case 3:
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if ( ( scanline > 249 ) || ( scanline % 10 >= 8 ) )
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bitmap.fill(7, r );
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else
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{
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for( i = 0; i < 80; i++ )
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{
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uint8_t pattern = read_vram( m_ula.screen_addr + i * 8 );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>7)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>6)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>5)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>4)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>3)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>2)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>1)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>0)&1] );
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}
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m_ula.screen_addr++;
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}
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if ( scanline % 10 == 9 )
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m_ula.screen_addr += 0x278;
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break;
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case 4:
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case 7:
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for( i = 0; i < 40; i++ )
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{
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uint8_t pattern = read_vram( m_ula.screen_addr + i * 8 );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>7)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>7)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>6)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>6)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>5)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>5)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>4)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>4)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>3)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>3)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>2)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>2)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>1)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>1)&1] );
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plot_pixel( bitmap, x++, scanline, pal[(pattern>>0)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>0)&1] );
|
||||||
|
}
|
||||||
|
m_ula.screen_addr++;
|
||||||
|
if ( ( scanline & 0x07 ) == 7 )
|
||||||
|
m_ula.screen_addr += 0x138;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case 5:
|
||||||
|
for( i = 0; i < 40; i++ )
|
||||||
|
{
|
||||||
|
uint8_t pattern = read_vram( m_ula.screen_addr + i * 8 );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>3]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>3]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>3]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>3]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>2]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>2]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>2]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>2]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>1]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>1]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>1]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>1]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>0]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>0]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>0]] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[m_map4[pattern>>0]] );
|
||||||
|
}
|
||||||
|
m_ula.screen_addr++;
|
||||||
|
if ( ( scanline & 0x07 ) == 7 )
|
||||||
|
m_ula.screen_addr += 0x138;
|
||||||
|
break;
|
||||||
|
|
||||||
|
case 6:
|
||||||
|
if ( ( scanline > 249 ) || ( scanline % 10 >= 8 ) )
|
||||||
|
bitmap.fill(7, r );
|
||||||
|
else
|
||||||
|
{
|
||||||
|
for( i = 0; i < 40; i++ )
|
||||||
|
{
|
||||||
|
uint8_t pattern = read_vram( m_ula.screen_addr + i * 8 );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>7)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>7)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>6)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>6)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>5)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>5)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>4)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>4)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>3)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>3)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>2)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>2)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>1)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>1)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>0)&1] );
|
||||||
|
plot_pixel( bitmap, x++, scanline, pal[(pattern>>0)&1] );
|
||||||
|
}
|
||||||
|
m_ula.screen_addr++;
|
||||||
|
if ( ( scanline % 10 ) == 7 )
|
||||||
|
m_ula.screen_addr += 0x138;
|
||||||
|
}
|
||||||
|
break;
|
||||||
}
|
}
|
||||||
|
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
READ8_MEMBER(accomm_state::sheila_r)
|
||||||
|
{
|
||||||
|
uint8_t data = 0;
|
||||||
|
switch ( offset & 0x0f )
|
||||||
|
{
|
||||||
|
case 0x00: /* Interrupt status */
|
||||||
|
data = m_ula.interrupt_status;
|
||||||
|
m_ula.interrupt_status &= ~0x02;
|
||||||
|
break;
|
||||||
|
case 0x01: /* Unknown */
|
||||||
|
break;
|
||||||
|
case 0x04: /* Cassette data shift register */
|
||||||
|
interrupt_handler(INT_CLEAR, INT_RECEIVE_FULL );
|
||||||
|
data = m_ula.tape_byte;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
logerror( "ULA: read offset %02x: %02x\n", offset, data );
|
||||||
|
return data;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const int palette_offset[4] = { 0, 4, 5, 1 };
|
||||||
|
static const uint16_t screen_base[8] = { 0x3000, 0x3000, 0x3000, 0x4000, 0x5800, 0x5800, 0x6000, 0x5800 };
|
||||||
|
|
||||||
|
WRITE8_MEMBER(accomm_state::sheila_w)
|
||||||
|
{
|
||||||
|
int i = palette_offset[(( offset >> 1 ) & 0x03)];
|
||||||
|
logerror( "ULA: write offset %02x <- %02x\n", offset & 0x0f, data );
|
||||||
|
switch( offset & 0x0f )
|
||||||
|
{
|
||||||
|
case 0x00: /* Interrupt control */
|
||||||
|
m_ula.interrupt_control = data;
|
||||||
|
break;
|
||||||
|
case 0x01: /* Unknown */
|
||||||
|
break;
|
||||||
|
case 0x02: /* Screen start address #1 */
|
||||||
|
m_ula.screen_start = ( m_ula.screen_start & 0x7e00 ) | ( ( data & 0xe0 ) << 1 );
|
||||||
|
logerror( "screen_start changed to %04x\n", m_ula.screen_start );
|
||||||
|
break;
|
||||||
|
case 0x03: /* Screen start address #2 */
|
||||||
|
m_ula.screen_start = ( m_ula.screen_start & 0x1c0 ) | ( ( data & 0x3f ) << 9 );
|
||||||
|
logerror( "screen_start changed to %04x\n", m_ula.screen_start );
|
||||||
|
break;
|
||||||
|
case 0x04: /* Cassette data shift register */
|
||||||
|
break;
|
||||||
|
case 0x05: /* Interrupt clear and paging */
|
||||||
|
/* rom page requests are honoured when currently bank 0-7 or 12-15 is switched in,
|
||||||
|
* or when 8-11 is currently switched in only switching to bank 8-15 is allowed.
|
||||||
|
*
|
||||||
|
* Rompages 10 and 11 both select the Basic ROM.
|
||||||
|
* Rompages 8 and 9 both select the keyboard.
|
||||||
|
*/
|
||||||
|
if ( ( ( m_ula.rompage & 0x0C ) != 0x08 ) || ( data & 0x08 ) )
|
||||||
|
{
|
||||||
|
m_ula.rompage = data & 0x0f;
|
||||||
|
}
|
||||||
|
if ( data & 0x10 )
|
||||||
|
{
|
||||||
|
interrupt_handler( INT_CLEAR, INT_DISPLAY_END );
|
||||||
|
}
|
||||||
|
if ( data & 0x20 )
|
||||||
|
{
|
||||||
|
interrupt_handler( INT_CLEAR, INT_RTC );
|
||||||
|
}
|
||||||
|
if ( data & 0x40 )
|
||||||
|
{
|
||||||
|
interrupt_handler( INT_CLEAR, INT_HIGH_TONE );
|
||||||
|
}
|
||||||
|
if ( data & 0x80 )
|
||||||
|
{
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case 0x06: /* Counter divider */
|
||||||
|
if ( m_ula.communication_mode == 0x01)
|
||||||
|
{
|
||||||
|
/* GUESS
|
||||||
|
* the Advanced Users manual says this is the correct algorithm
|
||||||
|
* but the divider is wrong(?), says 16 but results in high pitch,
|
||||||
|
* 32 is more close
|
||||||
|
*/
|
||||||
|
//m_beeper->set_clock( 1000000 / ( 32 * ( data + 1 ) ) );
|
||||||
|
}
|
||||||
|
break;
|
||||||
|
case 0x07: /* Misc. */
|
||||||
|
m_ula.communication_mode = ( data >> 1 ) & 0x03;
|
||||||
|
switch( m_ula.communication_mode )
|
||||||
|
{
|
||||||
|
case 0x00: /* cassette input */
|
||||||
|
//m_beeper->set_state( 0 );
|
||||||
|
//_start();
|
||||||
|
break;
|
||||||
|
case 0x01: /* sound generation */
|
||||||
|
//m_beeper->set_state( 1 );
|
||||||
|
//electron_tape_stop();
|
||||||
|
break;
|
||||||
|
case 0x02: /* cassette output */
|
||||||
|
//m_beeper->set_state( 0 );
|
||||||
|
//electron_tape_stop();
|
||||||
|
break;
|
||||||
|
case 0x03: /* not used */
|
||||||
|
//m_beeper->set_state( 0 );
|
||||||
|
//electron_tape_stop();
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
m_ula.screen_mode = ( data >> 3 ) & 0x07;
|
||||||
|
m_ula.screen_base = screen_base[ m_ula.screen_mode ];
|
||||||
|
m_ula.screen_size = 0x8000 - m_ula.screen_base;
|
||||||
|
m_ula.vram = (uint8_t *)m_vram.target() + m_ula.screen_base;
|
||||||
|
logerror( "ULA: screen mode set to %d\n", m_ula.screen_mode );
|
||||||
|
m_ula.cassette_motor_mode = ( data >> 6 ) & 0x01;
|
||||||
|
//m_cassette->change_state(m_ula.cassette_motor_mode ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED, CASSETTE_MOTOR_DISABLED );
|
||||||
|
m_ula.capslock_mode = ( data >> 7 ) & 0x01;
|
||||||
|
break;
|
||||||
|
case 0x08: case 0x0A: case 0x0C: case 0x0E:
|
||||||
|
// video_update
|
||||||
|
m_ula.current_pal[i+10] = (m_ula.current_pal[i+10] & 0x01) | (((data & 0x80) >> 5) | ((data & 0x08) >> 1));
|
||||||
|
m_ula.current_pal[i+8] = (m_ula.current_pal[i+8] & 0x01) | (((data & 0x40) >> 4) | ((data & 0x04) >> 1));
|
||||||
|
m_ula.current_pal[i+2] = (m_ula.current_pal[i+2] & 0x03) | ((data & 0x20) >> 3);
|
||||||
|
m_ula.current_pal[i] = (m_ula.current_pal[
|
||||||
|
i] & 0x03) | ((data & 0x10) >> 2);
|
||||||
|
break;
|
||||||
|
case 0x09: case 0x0B: case 0x0D: case 0x0F:
|
||||||
|
// video_update
|
||||||
|
m_ula.current_pal[i+10] = (m_ula.current_pal[i+10] & 0x06) | ((data & 0x08) >> 3);
|
||||||
|
m_ula.current_pal[i+8] = (m_ula.current_pal[i+8] & 0x06) | ((data & 0x04) >> 2);
|
||||||
|
m_ula.current_pal[i+2] = (m_ula.current_pal[i+2] & 0x04) | (((data & 0x20) >> 4) | ((data & 0x02) >> 1));
|
||||||
|
m_ula.current_pal[i] = (m_ula.current_pal[i] & 0x04) | (((data & 0x10) >> 3) | ((data & 0x01)));
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void accomm_state::interrupt_handler(int mode, int interrupt)
|
||||||
|
{
|
||||||
|
if ( mode == INT_SET )
|
||||||
|
{
|
||||||
|
m_ula.interrupt_status |= interrupt;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
m_ula.interrupt_status &= ~interrupt;
|
||||||
|
}
|
||||||
|
if ( m_ula.interrupt_status & m_ula.interrupt_control & ~0x83 )
|
||||||
|
{
|
||||||
|
m_ula.interrupt_status |= 0x01;
|
||||||
|
m_maincpu->set_input_line(0, ASSERT_LINE );
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{
|
||||||
|
m_ula.interrupt_status &= ~0x01;
|
||||||
|
m_maincpu->set_input_line(0, CLEAR_LINE );
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
static ADDRESS_MAP_START( main_map, AS_PROGRAM, 8, accomm_state )
|
static ADDRESS_MAP_START( main_map, AS_PROGRAM, 8, accomm_state )
|
||||||
AM_RANGE(0x000000, 0x007fff) AM_RAM
|
AM_RANGE(0x000000, 0x007fff) AM_RAM
|
||||||
AM_RANGE(0x008000, 0x00ffff) AM_DEVICE("bank0dev", address_map_bank_device, amap8)
|
AM_RANGE(0x008000, 0x00ffff) AM_DEVICE("bank0dev", address_map_bank_device, amap8)
|
||||||
AM_RANGE(0x010000, 0x08ffff) AM_RAM // "576K RAM"
|
AM_RANGE(0x010000, 0x08ffff) AM_RAM // "576K RAM"
|
||||||
// VIA probably at 420000
|
|
||||||
AM_RANGE(0x440000, 0x440000) AM_WRITE(b0_rom_disable_w)
|
AM_RANGE(0x440000, 0x440000) AM_WRITE(b0_rom_disable_w)
|
||||||
AM_RANGE(0x450000, 0x467fff) AM_RAM AM_SHARE("vram")
|
AM_RANGE(0x450000, 0x457fff) AM_RAM AM_SHARE("vram")
|
||||||
|
AM_RANGE(0x458000, 0x45bfff) AM_READ(read_keyboard)
|
||||||
|
AM_RANGE(0x45fe00, 0x45feff) AM_READWRITE(sheila_r, sheila_w)
|
||||||
|
AM_RANGE(0x460000, 0x467fff) AM_RAM // nvram?
|
||||||
AM_RANGE(0xfc0000, 0xffffff) AM_ROM AM_REGION("maincpu", 0)
|
AM_RANGE(0xfc0000, 0xffffff) AM_ROM AM_REGION("maincpu", 0)
|
||||||
ADDRESS_MAP_END
|
ADDRESS_MAP_END
|
||||||
|
|
||||||
@ -118,18 +559,109 @@ static ADDRESS_MAP_START( b0dev_map, AS_PROGRAM, 8, accomm_state )
|
|||||||
ADDRESS_MAP_END
|
ADDRESS_MAP_END
|
||||||
|
|
||||||
static INPUT_PORTS_START( accomm )
|
static INPUT_PORTS_START( accomm )
|
||||||
|
PORT_START("LINE.0")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("\xE2\x86\x92 | \\") PORT_CODE(KEYCODE_BACKSLASH) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) PORT_CHAR('|') PORT_CHAR('\\') // on the real keyboard, this would be on the 1st row, the 3rd key after 0
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("COPY") PORT_CODE(KEYCODE_END) PORT_CHAR(UCHAR_MAMEKEY(F1)) PORT_CHAR('[') PORT_CHAR(']')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_UNUSED)
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ')
|
||||||
|
|
||||||
|
PORT_START("LINE.1")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("\xE2\x86\x90 ^ ~") PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) PORT_CHAR('^') PORT_CHAR('~')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("\xE2\x86\x93 _ }") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_CHAR('_') PORT_CHAR('}')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("RETURN") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13)
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("DELETE") PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(8)
|
||||||
|
|
||||||
|
PORT_START("LINE.2")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("\xE2\x86\x91 \xC2\xA3 {") PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR(UCHAR_MAMEKEY(UP)) PORT_CHAR('\xA3') PORT_CHAR('{')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(':') PORT_CHAR('*')
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_UNUSED)
|
||||||
|
|
||||||
|
PORT_START("LINE.3")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_CHAR('@')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+')
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?')
|
||||||
|
|
||||||
|
PORT_START("LINE.4")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L')
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>')
|
||||||
|
|
||||||
|
PORT_START("LINE.5")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K')
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<')
|
||||||
|
|
||||||
|
PORT_START("LINE.6")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J')
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M')
|
||||||
|
|
||||||
|
PORT_START("LINE.7")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H')
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N')
|
||||||
|
|
||||||
|
PORT_START("LINE.8")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G')
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B')
|
||||||
|
|
||||||
|
PORT_START("LINE.9")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F')
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V')
|
||||||
|
|
||||||
|
PORT_START("LINE.10")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D')
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C')
|
||||||
|
|
||||||
|
PORT_START("LINE.11")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S')
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X')
|
||||||
|
|
||||||
|
PORT_START("LINE.12")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!')
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q')
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A')
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z')
|
||||||
|
|
||||||
|
PORT_START("LINE.13")
|
||||||
|
PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("ESCAPE") PORT_CODE(KEYCODE_ESC) PORT_CHAR(UCHAR_MAMEKEY(ESC))
|
||||||
|
PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("FUNC") PORT_CODE(KEYCODE_TAB) PORT_CHAR(UCHAR_MAMEKEY(LALT))
|
||||||
|
PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2)
|
||||||
|
PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_CODE(KEYCODE_RSHIFT) PORT_CODE(KEYCODE_LSHIFT) PORT_CHAR(UCHAR_SHIFT_1)
|
||||||
|
|
||||||
|
PORT_START("BRK") /* BREAK */
|
||||||
|
//PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD) PORT_NAME("BREAK") PORT_CODE(KEYCODE_F12) PORT_CHAR(UCHAR_MAMEKEY(F12)) PORT_CHANGED_MEMBER(DEVICE_SELF, accomm_state, trigger_reset, 0)
|
||||||
INPUT_PORTS_END
|
INPUT_PORTS_END
|
||||||
|
|
||||||
static MACHINE_CONFIG_START( accomm )
|
static MACHINE_CONFIG_START( accomm )
|
||||||
MCFG_CPU_ADD("maincpu", G65816, XTAL_2MHz)
|
MCFG_CPU_ADD("maincpu", G65816, XTAL_2MHz)
|
||||||
MCFG_CPU_PROGRAM_MAP(main_map)
|
MCFG_CPU_PROGRAM_MAP(main_map)
|
||||||
// MCFG_CPU_VBLANK_INT_DRIVER("screen", accomm_state, irq0_line_hold)
|
MCFG_CPU_VBLANK_INT_DRIVER("screen", accomm_state, vbl_int)
|
||||||
|
|
||||||
MCFG_SCREEN_ADD("screen", RASTER)
|
MCFG_SCREEN_ADD("screen", RASTER)
|
||||||
MCFG_SCREEN_REFRESH_RATE( 50.08 )
|
MCFG_SCREEN_REFRESH_RATE( 50.08 )
|
||||||
MCFG_SCREEN_SIZE( 640, 312 )
|
MCFG_SCREEN_SIZE( 640, 312 )
|
||||||
MCFG_SCREEN_VISIBLE_AREA( 0, 640-1, 0, 256-1 )
|
MCFG_SCREEN_VISIBLE_AREA( 0, 640-1, 0, 256-1 )
|
||||||
MCFG_SCREEN_UPDATE_DRIVER(accomm_state, screen_update)
|
MCFG_SCREEN_UPDATE_DRIVER(accomm_state, screen_update)
|
||||||
|
MCFG_SCREEN_VIDEO_ATTRIBUTES(VIDEO_UPDATE_SCANLINE)
|
||||||
|
MCFG_SCREEN_PALETTE("palette")
|
||||||
|
|
||||||
|
MCFG_PALETTE_ADD( "palette", 16 )
|
||||||
|
MCFG_PALETTE_INIT_OWNER(accomm_state, accomm)
|
||||||
|
|
||||||
MCFG_DEVICE_ADD("bank0dev", ADDRESS_MAP_BANK, 0)
|
MCFG_DEVICE_ADD("bank0dev", ADDRESS_MAP_BANK, 0)
|
||||||
MCFG_DEVICE_PROGRAM_MAP(b0dev_map)
|
MCFG_DEVICE_PROGRAM_MAP(b0dev_map)
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user