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Diffstat (limited to 'src/mame/drivers/b16.cpp')
-rw-r--r-- | src/mame/drivers/b16.cpp | 310 |
1 files changed, 0 insertions, 310 deletions
diff --git a/src/mame/drivers/b16.cpp b/src/mame/drivers/b16.cpp deleted file mode 100644 index 87e279dde94..00000000000 --- a/src/mame/drivers/b16.cpp +++ /dev/null @@ -1,310 +0,0 @@ -// license:BSD-3-Clause -// copyright-holders:Angelo Salese -/*************************************************************************** - - Hitachi B(asic Master?) 16 - - very preliminary driver by Angelo Salese - - TODO: - - Driver is all made up of educated guesses (no documentation available) - - 0xfcc67 after the ROM checksum to zero (bp 0xfc153 -> SI = 0) -> system boots - -****************************************************************************/ - -#include "emu.h" -#include "cpu/i86/i86.h" -#include "machine/am9517a.h" -#include "video/mc6845.h" -#include "emupal.h" -#include "screen.h" - - -class b16_state : public driver_device -{ -public: - b16_state(const machine_config &mconfig, device_type type, const char *tag) : - driver_device(mconfig, type, tag), - m_vram(*this, "vram"), - m_mc6845(*this, "crtc"), - m_dma8237(*this, "8237dma"), - m_maincpu(*this, "maincpu"), - m_gfxdecode(*this, "gfxdecode"), - m_palette(*this, "palette"), - m_char_rom(*this, "pcg") - { } - - void b16(machine_config &config); - -protected: - virtual void video_start() override; - -private: - uint8_t m_crtc_vreg[0x100], m_crtc_index; - - required_shared_ptr<uint16_t> m_vram; - required_device<mc6845_device> m_mc6845; - required_device<am9517a_device> m_dma8237; - required_device<cpu_device> m_maincpu; - required_device<gfxdecode_device> m_gfxdecode; - required_device<palette_device> m_palette; - required_region_ptr<uint8_t> m_char_rom; - - DECLARE_READ16_MEMBER(vblank_r); - DECLARE_WRITE8_MEMBER(b16_pcg_w); - DECLARE_WRITE8_MEMBER(b16_6845_address_w); - DECLARE_WRITE8_MEMBER(b16_6845_data_w); - DECLARE_READ8_MEMBER(unk_dev_r); - DECLARE_WRITE8_MEMBER(unk_dev_w); - DECLARE_READ8_MEMBER(memory_read_byte); - DECLARE_WRITE8_MEMBER(memory_write_byte); - - uint32_t screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); - - void b16_io(address_map &map); - void b16_map(address_map &map); -}; - -#define mc6845_h_char_total (m_crtc_vreg[0]) -#define mc6845_h_display (m_crtc_vreg[1]) -#define mc6845_h_sync_pos (m_crtc_vreg[2]) -#define mc6845_sync_width (m_crtc_vreg[3]) -#define mc6845_v_char_total (m_crtc_vreg[4]) -#define mc6845_v_total_adj (m_crtc_vreg[5]) -#define mc6845_v_display (m_crtc_vreg[6]) -#define mc6845_v_sync_pos (m_crtc_vreg[7]) -#define mc6845_mode_ctrl (m_crtc_vreg[8]) -#define mc6845_tile_height (m_crtc_vreg[9]+1) -#define mc6845_cursor_y_start (m_crtc_vreg[0x0a]) -#define mc6845_cursor_y_end (m_crtc_vreg[0x0b]) -#define mc6845_start_addr (((m_crtc_vreg[0x0c]<<8) & 0x3f00) | (m_crtc_vreg[0x0d] & 0xff)) -#define mc6845_cursor_addr (((m_crtc_vreg[0x0e]<<8) & 0x3f00) | (m_crtc_vreg[0x0f] & 0xff)) -#define mc6845_light_pen_addr (((m_crtc_vreg[0x10]<<8) & 0x3f00) | (m_crtc_vreg[0x11] & 0xff)) -#define mc6845_update_addr (((m_crtc_vreg[0x12]<<8) & 0x3f00) | (m_crtc_vreg[0x13] & 0xff)) - - -void b16_state::video_start() -{ - save_item(NAME(m_crtc_vreg)); - save_item(NAME(m_crtc_index)); -} - - -uint32_t b16_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) -{ - for(int y=0;y<mc6845_v_display;y++) - { - for(int x=0;x<mc6845_h_display;x++) - { - int tile = m_vram[x+y*mc6845_h_display] & 0xff; - int color = (m_vram[x+y*mc6845_h_display] & 0x700) >> 8; - int pen; - - for(int yi=0;yi<mc6845_tile_height;yi++) - { - for(int xi=0;xi<8;xi++) - { - pen = (m_char_rom[tile*16+yi] >> (7-xi) & 1) ? color : 0; - - if(y*mc6845_tile_height < 400 && x*8+xi < 640) /* TODO: safety check */ - bitmap.pix16(y*mc6845_tile_height+yi, x*8+xi) = m_palette->pen(pen); - } - } - } - } - - return 0; -} - -WRITE8_MEMBER( b16_state::b16_pcg_w ) -{ - m_char_rom[offset] = data; - - m_gfxdecode->gfx(0)->mark_dirty(offset >> 4); -} - -void b16_state::b16_map(address_map &map) -{ - map.unmap_value_high(); - map(0x00000, 0x9ffff).ram(); // probably not all of it. - map(0xa0000, 0xaffff).ram(); // bitmap? - map(0xb0000, 0xb7fff).ram().share("vram"); // tvram - map(0xb8000, 0xbbfff).w(FUNC(b16_state::b16_pcg_w)).umask16(0x00ff); // pcg - map(0xfc000, 0xfffff).rom().region("ipl", 0); -} - -READ16_MEMBER( b16_state::vblank_r ) -{ - return ioport("SYSTEM")->read(); -} - -WRITE8_MEMBER( b16_state::b16_6845_address_w ) -{ - m_crtc_index = data; - m_mc6845->address_w(data); -} - -WRITE8_MEMBER( b16_state::b16_6845_data_w ) -{ - m_crtc_vreg[m_crtc_index] = data; - m_mc6845->register_w(data); -} - -/* -Pretty weird protocol, dunno what it is ... - -8a (06) W -(04) R -ff (04) W -(04) R -ff (04) W -36 (0e) W -ff (08) W -ff (08) W -06 (0e) W -(08) R -(08) R -36 (0e) W -40 (08) W -9c (08) W -76 (0e) W -ff (0a) W -ff (0a) W -46 (0e) W -(0a) R -(0a) R -76 (0e) W -1a (0a) W -00 (0a) W -b6 (0e) W -ff (0c) W -ff (0c) W -86 (0e) W -(0c) R -(0c) R -b6 (0e) W -34 (0c) W -00 (0c) W -36 (0e) W -b6 (0e) W -40 (08) W -9c (08) W -34 (0c) W -00 (0c) W -8a (06) W -06 (06) W -05 (06) W -*/ - -READ8_MEMBER( b16_state::unk_dev_r ) -{ - static int test; - - printf("(%02x) R\n",offset << 1); - - if(offset == 0x8/2 || offset == 0x0a/2 || offset == 0x0c/2) // quick hack - { - test^=1; - return test ? 0x9f : 0x92; - } - - return 0xff; -} - -WRITE8_MEMBER( b16_state::unk_dev_w ) -{ - printf("%02x (%02x) W\n",data,offset << 1); - -} - -void b16_state::b16_io(address_map &map) -{ - map.unmap_value_high(); - map(0x00, 0x0f).rw(FUNC(b16_state::unk_dev_r), FUNC(b16_state::unk_dev_w)).umask16(0x00ff); // DMA device? - map(0x20, 0x20).w(FUNC(b16_state::b16_6845_address_w)); - map(0x22, 0x22).w(FUNC(b16_state::b16_6845_data_w)); - //0x79 bit 0 DSW? - map(0x80, 0x81).r(FUNC(b16_state::vblank_r)); // TODO -} - - -/* Input ports */ -static INPUT_PORTS_START( b16 ) - PORT_START("SYSTEM") - PORT_BIT( 0x20, IP_ACTIVE_HIGH, IPT_CUSTOM ) PORT_VBLANK("screen") -INPUT_PORTS_END - - - - -static const gfx_layout b16_charlayout = -{ - 8, 16, - RGN_FRAC(1,1), - 1, - { 0 }, - { STEP8(0,1) }, - { STEP16(0,8) }, - 8*16 -}; - -static GFXDECODE_START( gfx_b16 ) - GFXDECODE_ENTRY( "pcg", 0x0000, b16_charlayout, 0, 1 ) -GFXDECODE_END - -READ8_MEMBER(b16_state::memory_read_byte) -{ - address_space& prog_space = m_maincpu->space(AS_PROGRAM); - return prog_space.read_byte(offset); -} - -WRITE8_MEMBER(b16_state::memory_write_byte) -{ - address_space& prog_space = m_maincpu->space(AS_PROGRAM); - return prog_space.write_byte(offset, data); -} - - -void b16_state::b16(machine_config &config) -{ - /* basic machine hardware */ - I8086(config, m_maincpu, XTAL(14'318'181)/2); //unknown xtal - m_maincpu->set_addrmap(AS_PROGRAM, &b16_state::b16_map); - m_maincpu->set_addrmap(AS_IO, &b16_state::b16_io); - - /* video hardware */ - screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); - screen.set_refresh_hz(60); - screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */ - screen.set_screen_update(FUNC(b16_state::screen_update)); - screen.set_size(640, 400); - screen.set_visarea_full(); - screen.set_palette(m_palette); - - MC6845(config, m_mc6845, XTAL(14'318'181)/5); /* unknown variant, unknown clock, hand tuned to get ~60 fps */ - m_mc6845->set_screen("screen"); - m_mc6845->set_show_border_area(false); - m_mc6845->set_char_width(8); - - AM9517A(config, m_dma8237, XTAL(14'318'181)/2); - m_dma8237->in_memr_callback().set(FUNC(b16_state::memory_read_byte)); - m_dma8237->out_memw_callback().set(FUNC(b16_state::memory_write_byte)); - - GFXDECODE(config, m_gfxdecode, m_palette, gfx_b16); - PALETTE(config, m_palette).set_entries(8); -// MCFG_PALETTE_INIT_STANDARD(black_and_white) // TODO -} - -/* ROM definition */ -ROM_START( b16 ) - ROM_REGION( 0x4000, "ipl", ROMREGION_ERASEFF ) - ROM_LOAD( "ipl.rom", 0x0000, 0x4000, CRC(7c1c93d5) SHA1(2a1e63a689c316ff836f21646166b38714a18e03) ) - - ROM_REGION( 0x4000/2, "pcg", ROMREGION_ERASE00 ) -ROM_END - -/* Driver */ - -/* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ -COMP( 1983, b16, 0, 0, b16, b16, b16_state, empty_init, "Hitachi", "B16", MACHINE_NOT_WORKING | MACHINE_NO_SOUND) |