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jaleco/ddayjlc.cpp: hookup i8257 in place of custom code
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angelosa
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a9dcae6038
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@ -2,16 +2,14 @@
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// copyright-holders:Pierpaolo Prazzoli, Tomasz Slanina, Angelo Salese
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/*
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D-DAY (c)Jaleco 1984
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D-DAY (c)Jaleco 1984
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driver by Pierpaolo Prazzoli, Tomasz Slanina and Angelo Salese
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TODO:
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- text colors most likely are hardwired but iirc hi score text has a different color? Needs a reference shot;
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- unused upper sprite color bank;
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- improve sound comms, sometimes BGM becomes silent;
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- hookup proper i8257 device;
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- identify & dump MCU;
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TODO:
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- text colors most likely are hardwired but iirc hi score text has a different color?
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Needs a reference shot;
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- unused upper sprite color bank;
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- improve sound comms, sometimes BGM becomes silent;
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- identify & dump MCU;
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-------------------------------------------------------
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Is it 1984 or 1987 game ?
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@ -62,6 +60,7 @@ $842f = lives
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#include "emu.h"
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#include "cpu/z80/z80.h"
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#include "machine/gen_latch.h"
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#include "machine/i8257.h"
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#include "sound/ay8910.h"
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#include "emupal.h"
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#include "screen.h"
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@ -84,7 +83,8 @@ public:
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m_audiocpu(*this, "audiocpu"),
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m_gfxdecode(*this, "gfxdecode"),
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m_palette(*this, "palette"),
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m_soundlatch(*this, "soundlatch")
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m_soundlatch(*this, "soundlatch"),
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m_dma(*this, "dma")
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{ }
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void ddayjlc(machine_config &config);
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@ -109,8 +109,6 @@ private:
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void bg2_w(uint8_t data);
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void sound_w(uint8_t data);
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void flip_screen_w(uint8_t data);
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void i8257_CH0_w(offs_t offset, uint8_t data);
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void i8257_LMSR_w(address_space &space, uint8_t data);
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TILE_GET_INFO_MEMBER(get_tile_info_bg);
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TILE_GET_INFO_MEMBER(get_tile_info_fg);
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void ddayjlc_palette(palette_device &palette) const;
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@ -134,8 +132,6 @@ private:
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/* misc */
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bool m_sound_nmi_enable = false;
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bool m_main_nmi_enable = false;
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int32_t m_e00x_l[4]{};
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int32_t m_e00x_d[4][2]{};
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uint8_t m_prot_addr = 0;
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/* devices */
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@ -144,6 +140,14 @@ private:
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required_device<gfxdecode_device> m_gfxdecode;
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required_device<palette_device> m_palette;
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required_device<generic_latch_8_device> m_soundlatch;
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required_device<i8257_device> m_dma;
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uint8_t dma_mem_r(offs_t offset);
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void dma_mem_w(offs_t offset, u8 data);
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void hrq_w(int state);
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u8 dma_r();
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void dma_w(u8 data);
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u8 m_dma_latch = 0;
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void draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect);
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void draw_foreground(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect);
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@ -360,35 +364,6 @@ void ddayjlc_state::flip_screen_w(uint8_t data)
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flip_screen_set(data & 1);
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}
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void ddayjlc_state::i8257_CH0_w(offs_t offset, uint8_t data)
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{
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m_e00x_d[offset][m_e00x_l[offset]] = data;
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m_e00x_l[offset] ^= 1;
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}
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void ddayjlc_state::i8257_LMSR_w(address_space &space, uint8_t data)
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{
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if (!data)
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{
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int32_t src = m_e00x_d[0][1] * 256 + m_e00x_d[0][0];
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int32_t dst = m_e00x_d[2][1] * 256 + m_e00x_d[2][0];
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int32_t size = (m_e00x_d[1][1] * 256 + m_e00x_d[1][0]) & 0x3ff;
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int32_t i;
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size++; //??
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for(i = 0; i < size; i++)
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space.write_byte(dst++, space.read_byte(src++));
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m_e00x_l[0] = 0;
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m_e00x_l[1] = 0;
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m_e00x_l[2] = 0;
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m_e00x_l[3] = 0;
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}
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}
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void ddayjlc_state::main_map(address_map &map)
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{
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map(0x0000, 0x7fff).rom();
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@ -397,13 +372,16 @@ void ddayjlc_state::main_map(address_map &map)
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map(0x9400, 0x97ff).ram().w(FUNC(ddayjlc_state::vram_w)).share("videoram");
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map(0x9800, 0x9fff).ram().w(FUNC(ddayjlc_state::bgvram_w)).share("bgram"); /* 9800-981f - videoregs */
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map(0xa000, 0xdfff).bankr("bank1").nopw();
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map(0xe000, 0xe003).w(FUNC(ddayjlc_state::i8257_CH0_w));
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map(0xe008, 0xe008).nopw(); // i8257 control byte
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map(0xe000, 0xe008).rw(m_dma, FUNC(i8257_device::read), FUNC(i8257_device::write));
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map(0xf000, 0xf000).w(FUNC(ddayjlc_state::sound_w));
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map(0xf100, 0xf100).nopw(); // sound related (f/f irq trigger?)
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map(0xf080, 0xf080).portr("P2").w(FUNC(ddayjlc_state::char_bank_w));
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map(0xf081, 0xf081).w(FUNC(ddayjlc_state::flip_screen_w));
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map(0xf083, 0xf083).w(FUNC(ddayjlc_state::i8257_LMSR_w));
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// fn originally marked "LMSR"
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map(0xf083, 0xf083).lw8(NAME([this] (u8 data) {
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m_dma->dreq1_w(BIT(data, 0));
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m_dma->dreq0_w(BIT(data, 0));
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}));
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map(0xf084, 0xf084).w(FUNC(ddayjlc_state::bg0_w));
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map(0xf085, 0xf085).w(FUNC(ddayjlc_state::bg1_w));
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map(0xf086, 0xf086).w(FUNC(ddayjlc_state::bg2_w));
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@ -543,12 +521,6 @@ void ddayjlc_state::machine_start()
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save_item(NAME(m_sound_nmi_enable));
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save_item(NAME(m_main_nmi_enable));
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save_item(NAME(m_prot_addr));
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save_item(NAME(m_e00x_l));
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save_item(NAME(m_e00x_d[0]));
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save_item(NAME(m_e00x_d[1]));
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save_item(NAME(m_e00x_d[2]));
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save_item(NAME(m_e00x_d[3]));
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}
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void ddayjlc_state::machine_reset()
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@ -558,13 +530,6 @@ void ddayjlc_state::machine_reset()
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m_sound_nmi_enable = false;
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m_main_nmi_enable = false;
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m_prot_addr = 0;
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for (int i = 0; i < 4; i++)
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{
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m_e00x_l[i] = 0;
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m_e00x_d[i][0] = 0;
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m_e00x_d[i][1] = 0;
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}
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}
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void ddayjlc_state::ddayjlc_palette(palette_device &palette) const
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@ -599,6 +564,38 @@ void ddayjlc_state::ddayjlc_palette(palette_device &palette) const
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palette.set_pen_color(0x203, rgb_t(0xff, 0xff, 0xff));
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}
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uint8_t ddayjlc_state::dma_mem_r(offs_t offset)
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{
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address_space &program = m_maincpu->space(AS_PROGRAM);
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return program.read_byte(offset);
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}
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void ddayjlc_state::dma_mem_w(offs_t offset, u8 data)
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{
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address_space &program = m_maincpu->space(AS_PROGRAM);
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program.write_byte(offset, data);
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}
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void ddayjlc_state::hrq_w(int state)
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{
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m_maincpu->set_input_line(Z80_INPUT_LINE_BUSRQ, state);
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// TODO: why we need this?
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m_dma->hlda_w(state);
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}
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u8 ddayjlc_state::dma_r()
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{
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return m_dma_latch;
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}
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void ddayjlc_state::dma_w(u8 data)
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{
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m_dma_latch = data;
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}
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void ddayjlc_state::ddayjlc(machine_config &config)
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{
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/* basic machine hardware */
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@ -610,6 +607,14 @@ void ddayjlc_state::ddayjlc(machine_config &config)
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config.set_maximum_quantum(attotime::from_hz(6000));
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I8257(config, m_dma, 12000000/3);
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m_dma->out_hrq_cb().set(FUNC(ddayjlc_state::hrq_w));
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m_dma->in_memr_cb().set(FUNC(ddayjlc_state::dma_mem_r));
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m_dma->out_memw_cb().set(FUNC(ddayjlc_state::dma_mem_w));
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m_dma->in_ior_cb<1>().set(FUNC(ddayjlc_state::dma_r));
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m_dma->out_iow_cb<0>().set(FUNC(ddayjlc_state::dma_w));
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m_dma->set_reverse_rw_mode(true);
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/* video hardware */
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screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
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screen.set_refresh_hz(60);
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