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https://github.com/holub/mame
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(nw) jonos : keyboard and screen
This commit is contained in:
Robbbert
parent
ed47f48af4
commit
87885116e7
@ -12,13 +12,13 @@ CP/M. However, this one appears to be an 8085-based terminal.
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Haven't found any info.
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There are interrupt handlers at 5.5 (0x002c) and 6.5 (0x0034).
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Data presented at 5000 will appear on screen in a dumb-terminal format.
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****************************************************************************/
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#include "emu.h"
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#include "cpu/i8085/i8085.h"
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#include "machine/keyboard.h"
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#include "screen.h"
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@ -27,18 +27,24 @@ class jonos_state : public driver_device
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public:
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jonos_state(const machine_config &mconfig, device_type type, const char *tag)
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: driver_device(mconfig, type, tag)
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, m_p_videoram(*this, "videoram")
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, m_maincpu(*this, "maincpu")
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, m_p_videoram(*this, "videoram")
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, m_p_chargen(*this, "chargen")
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{ }
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DECLARE_DRIVER_INIT(jonos);
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uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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DECLARE_READ8_MEMBER(keyboard_r);
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DECLARE_WRITE8_MEMBER(cursor_w);
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u32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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void kbd_put(u8 data);
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private:
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u8 m_framecnt;
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u8 m_term_data;
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u8 m_curs_ctrl;
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u16 m_curs_pos;
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virtual void machine_reset() override;
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required_shared_ptr<uint8_t> m_p_videoram;
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required_device<cpu_device> m_maincpu;
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required_shared_ptr<u8> m_p_videoram;
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required_region_ptr<u8> m_p_chargen;
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};
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@ -48,9 +54,9 @@ static ADDRESS_MAP_START(jonos_mem, AS_PROGRAM, 8, jonos_state)
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ADDRESS_MAP_UNMAP_HIGH
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AM_RANGE(0x0000, 0x0fff) AM_ROM AM_REGION("roms", 0)
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AM_RANGE(0x1800, 0x27ff) AM_RAM AM_SHARE("videoram")
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AM_RANGE(0x3000, 0x3001) // unknown device
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AM_RANGE(0x3000, 0x3001) AM_WRITE(cursor_w) // unknown device
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AM_RANGE(0x4000, 0x4001) // unknown device
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AM_RANGE(0x5000, 0x5003) // unknown device
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AM_RANGE(0x5000, 0x5003) AM_READ(keyboard_r) // unknown device
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AM_RANGE(0x6000, 0x6001) // unknown device
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ADDRESS_MAP_END
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@ -58,29 +64,72 @@ ADDRESS_MAP_END
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static INPUT_PORTS_START( jonos )
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INPUT_PORTS_END
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void jonos_state::kbd_put(u8 data)
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{
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m_term_data = data;
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}
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READ8_MEMBER( jonos_state::keyboard_r )
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{
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if (offset == 0)
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{
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u8 data = m_term_data;
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m_term_data = 0;
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return data;
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}
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else
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if (m_term_data && offset == 2)
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return 0x20;
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return 0;
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}
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WRITE8_MEMBER( jonos_state::cursor_w )
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{
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if (offset == 1) // control byte
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m_curs_ctrl = (data == 0x80) ? 1 : 0;
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else
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if (m_curs_ctrl == 1)
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{
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m_curs_pos = (m_curs_pos & 0xff00) | data;
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m_curs_ctrl++;
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}
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else
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if (m_curs_ctrl == 2)
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m_curs_pos = (m_curs_pos & 0xff) | (data << 8);
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}
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void jonos_state::machine_reset()
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{
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m_curs_ctrl = 0;
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m_curs_pos = 0;
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m_term_data = 0;
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}
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uint32_t jonos_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
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{
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uint8_t y,ra,chr,gfx;
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uint16_t sy=0,ma=0,x;
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m_framecnt++;
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u8 y,ra,chr,gfx,inv;
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u16 sy=0,x;
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u16 ma = (m_p_videoram[0x7da] + (m_p_videoram[0x7db] << 8)) & 0x7ff;
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for (y = 0; y < 25; y++)
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for (y = 0; y < 24; y++)
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{
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for (ra = 0; ra < 12; ra++)
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{
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uint16_t *p = &bitmap.pix16(sy++);
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u16 *p = &bitmap.pix16(sy++);
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u16 cpos = y << 8;
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for (x = ma; x < ma + 80; x++)
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{
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chr = m_p_videoram[x];
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inv = (BIT(chr, 7) ^ ((cpos == m_curs_pos) && BIT(m_framecnt, 5))) ? 0xff : 0;
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chr &= 0x7f;
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if (ra < 8)
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gfx = m_p_chargen[(chr<<3) | ra ];
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gfx = m_p_chargen[(chr<<3) | ra ] ^ inv;
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else
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gfx = m_p_chargen[(chr<<3) | (ra&7) | 0x400];
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gfx = m_p_chargen[(chr<<3) | (ra&7) | 0x400] ^ inv;
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/* Display a scanline of a character */
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*p++ = BIT(gfx, 0);
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@ -91,9 +140,12 @@ uint32_t jonos_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap,
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*p++ = BIT(gfx, 5);
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*p++ = BIT(gfx, 6);
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*p++ = BIT(gfx, 7);
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cpos++;
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}
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}
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ma+=80;
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if (ma > 0x77f)
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ma -= 0x780;
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}
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return 0;
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}
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@ -127,17 +179,17 @@ static MACHINE_CONFIG_START( jonos )
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MCFG_SCREEN_REFRESH_RATE(60)
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MCFG_SCREEN_VBLANK_TIME(ATTOSECONDS_IN_USEC(2500)) /* not accurate */
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MCFG_SCREEN_UPDATE_DRIVER(jonos_state, screen_update)
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MCFG_SCREEN_SIZE(640, 300)
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MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 299)
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MCFG_SCREEN_SIZE(640, 288)
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MCFG_SCREEN_VISIBLE_AREA(0, 639, 0, 287)
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MCFG_SCREEN_PALETTE("palette")
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MCFG_GFXDECODE_ADD("gfxdecode", "palette", jonos)
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MCFG_PALETTE_ADD_MONOCHROME("palette")
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MCFG_DEVICE_ADD("keyboard", GENERIC_KEYBOARD, 0)
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MCFG_GENERIC_KEYBOARD_CB(PUT(jonos_state, kbd_put))
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MACHINE_CONFIG_END
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DRIVER_INIT_MEMBER(jonos_state,jonos)
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{
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}
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/* ROM definition */
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ROM_START( jonos )
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@ -154,4 +206,4 @@ ROM_END
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/* Driver */
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// YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS
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COMP( 198?, jonos, 0, 0, jonos, jonos, jonos_state, jonos, "Jonos", "Escort", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
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COMP( 198?, jonos, 0, 0, jonos, jonos, jonos_state, 0, "Jonos", "Escort", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)
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