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https://github.com/holub/mame
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Notes
This commit is contained in:
Angelo Salese
parent
183aac12da
commit
84e3a19694
@ -1,7 +1,26 @@
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/***************************************************************************
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NEC APC
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Advanced Personal Computer (c) 1982 NEC
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preliminary driver by Angelo Salese
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TODO:
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- Bogus DMA check, patched out for now
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- video emulation
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- Floppy device and IMD support
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- keyboard
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- Understand interrupt sources
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- NMI seems valid, dumps a x86 stack to vram?
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- Unknown RTC device type;
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- What are exactly APU and MPU devices? They sounds scary ...
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- DMA hook-ups
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- serial ports
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- parallel ports
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- Extract info regarding Hard Disk functionality
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- Various unknown ports
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- What kind of external ROM actually maps at 0xa****?
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============================================================================
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front ^
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card
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@ -12,7 +31,8 @@
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69PFB2 8086/8087 DFBU2J PFBU2L 2732
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69SNB RAM
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i/o memory map:
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----------------------------------------------------------------------------
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i/o memory map (preliminary):
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0x00 - 0x1f DMA
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0x20 - 0x23 i8259 master
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0x28 - 0x2f i8259 slave (even), pit8253 (odd)
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@ -72,8 +92,8 @@ public:
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DECLARE_WRITE8_MEMBER(apc_port_60_w);
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DECLARE_READ8_MEMBER(apc_gdc_r);
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DECLARE_WRITE8_MEMBER(apc_gdc_w);
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DECLARE_READ8_MEMBER(apc_dma_r);
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DECLARE_WRITE8_MEMBER(apc_dma_w);
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DECLARE_READ8_MEMBER(apc_kbd_r);
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DECLARE_WRITE8_MEMBER(apc_kbd_w);
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DECLARE_WRITE_LINE_MEMBER(apc_master_set_int_line);
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DECLARE_READ8_MEMBER(get_slave_ack);
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@ -213,19 +233,17 @@ WRITE8_MEMBER(apc_state::apc_gdc_w)
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m_hgdc1->write(space, (offset & 2) >> 1,data); // upd7220 character port
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}
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READ8_MEMBER(apc_state::apc_dma_r)
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READ8_MEMBER(apc_state::apc_kbd_r)
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{
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return i8237_r(machine().device("8237dma"), space, offset & 0xf);
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//printf("%08x\n",offset);
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return 0;
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}
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WRITE8_MEMBER(apc_state::apc_dma_w)
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WRITE8_MEMBER(apc_state::apc_kbd_w)
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{
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//printf("%08x %02x\n",m_maincpu->pc(),data);
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i8237_w(machine().device("8237dma"), space, offset & 0xf, data);
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printf("%08x %02x\n",offset,data);
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}
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static ADDRESS_MAP_START( apc_map, AS_PROGRAM, 16, apc_state )
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AM_RANGE(0x00000, 0x1ffff) AM_RAM
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// AM_RANGE(0xa0000, 0xaffff) space for an external ROM
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@ -234,14 +252,14 @@ ADDRESS_MAP_END
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static ADDRESS_MAP_START( apc_io, AS_IO, 16, apc_state )
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// ADDRESS_MAP_GLOBAL_MASK(0xff)
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AM_RANGE(0x00, 0x1f) AM_READWRITE8(apc_dma_r, apc_dma_w, 0x00ff)
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AM_RANGE(0x00, 0x1f) AM_DEVREADWRITE8_LEGACY("8237dma", i8237_r, i8237_w, 0x00ff)
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AM_RANGE(0x20, 0x23) AM_DEVREADWRITE8_LEGACY("pic8259_master", pic8259_r, pic8259_w, 0x00ff) // i8259
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AM_RANGE(0x28, 0x2f) AM_READWRITE8(apc_port_28_r, apc_port_28_w, 0xffff)
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// 0x30, 0x37 serial port 0/1 (i8251) (even/odd)
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// 0x38, 0x3f DMA extended address
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AM_RANGE(0x40, 0x43) AM_READWRITE8(apc_gdc_r, apc_gdc_w, 0xffff)
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// 0x46 UPD7220 reset interrupt
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// 0x48, 0x4f keyboard controller
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AM_RANGE(0x48, 0x4f) AM_READWRITE8(apc_kbd_r, apc_kbd_w, 0x00ff)
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AM_RANGE(0x50, 0x53) AM_DEVICE8("upd765", upd765a_device, map, 0x00ff ) // upd765
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// 0x5a APU data (Arithmetic Processing Unit!)
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// 0x5e APU status/command
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@ -355,6 +373,7 @@ static const gfx_layout charset_8x16 =
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static GFXDECODE_START( apc )
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GFXDECODE_ENTRY( "ipl", 0x0000, charset_8x16, 0, 8 )
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GFXDECODE_ENTRY( "gfx", 0x0000, charset_8x16, 0, 8 )
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GFXDECODE_END
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@ -393,7 +412,7 @@ ir0
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ir1
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ir2
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ir3
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ir4
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ir4 keyboard (almost trusted, check code at fe64a)
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ir5
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ir6
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ir7
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@ -402,7 +421,7 @@ ir7
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ir0
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ir1
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ir2
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ir3
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ir3 fdd irq?
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ir4
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ir5
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ir6
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@ -511,7 +530,7 @@ static const floppy_format_type apc_floppy_formats[] = {
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};
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static SLOT_INTERFACE_START( apc_floppies )
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SLOT_INTERFACE( "525hd", FLOPPY_525_HD ) // TODO: 8"
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SLOT_INTERFACE( "8sd", FLOPPY_8_SSSD ) // TODO: Ok?
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SLOT_INTERFACE_END
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@ -530,8 +549,8 @@ static MACHINE_CONFIG_START( apc, apc_state )
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MCFG_I8237_ADD("8237dma", MAIN_CLOCK, dma8237_config)
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MCFG_UPD765A_ADD("upd765", true, true)
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MCFG_FLOPPY_DRIVE_ADD("upd765:0", apc_floppies, "525hd", 0, apc_floppy_formats)
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MCFG_FLOPPY_DRIVE_ADD("upd765:1", apc_floppies, "525hd", 0, apc_floppy_formats)
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MCFG_FLOPPY_DRIVE_ADD("upd765:0", apc_floppies, "8sd", 0, apc_floppy_formats)
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MCFG_FLOPPY_DRIVE_ADD("upd765:1", apc_floppies, "8sd", 0, apc_floppy_formats)
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/* video hardware */
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MCFG_SCREEN_ADD("screen", RASTER)
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@ -585,4 +604,4 @@ DRIVER_INIT_MEMBER(apc_state,apc)
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}
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GAME( 198?, apc, 0, apc, apc, apc_state, apc, ROT0, "NEC", "APC", GAME_IS_SKELETON )
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GAME( 1982, apc, 0, apc, apc, apc_state, apc, ROT0, "NEC", "APC", GAME_NOT_WORKING | GAME_NO_SOUND )
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