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Hooked up upd71071, from suggestion by Carl & Barry (same DMAC as FM-Towns)

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This commit is contained in:
Angelo Salese 2012-11-22 03:51:49 +00:00
parent 172028c046
commit 332fb15494
1 changed files with 17 additions and 42 deletions
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59
src/mess/drivers/pc88va.c
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@ -17,7 +17,6 @@
hooked up by the current z80 core
- PC-88VA has two bogus opcodes. One is at 0xf0b15, another at 0xf0b31. Making a patch
for the latter makes the system to jump into a "DIP-Switch" display.
- DMA almost certainly ISN'T i8237. What is it?
********************************************************************************************/
@ -33,6 +32,7 @@
#include "formats/mfi_dsk.h"
#include "formats/xdf_dsk.h"
#include "formats/d88_dsk.h"
#include "machine/upd71071.h"
/* Note: for the time being, just disable FDC CPU, it's for PC-8801 compatibility mode anyway ... */
#define TEST_SUBFDC 0
@ -59,8 +59,10 @@ class pc88va_state : public driver_device
public:
pc88va_state(const machine_config &mconfig, device_type type, const char *tag)
: driver_device(mconfig, type, tag) ,
m_dmac(*this, "dmac"),
m_palram(*this, "palram"){ }
required_device<upd71071_device> m_dmac;
required_shared_ptr<UINT16> m_palram;
UINT16 m_bank_reg;
UINT16 m_screen_ctrl_reg;
@ -129,8 +131,6 @@ public:
DECLARE_WRITE8_MEMBER(r232_ctrl_portc_w);
DECLARE_WRITE_LINE_MEMBER(pc88va_pic_irq);
DECLARE_READ8_MEMBER(get_slave_ack);
DECLARE_READ8_MEMBER(pc88va_dma_r);
DECLARE_WRITE8_MEMBER(pc88va_dma_w);
DECLARE_WRITE_LINE_MEMBER(pc88va_pit_out0_changed);
DECLARE_WRITE_LINE_MEMBER(pc88va_upd765_interrupt);
UINT8 m_fdc_ctrl_2;
@ -946,7 +946,7 @@ READ8_MEMBER(pc88va_state::rom_bank_r)
READ8_MEMBER(pc88va_state::key_r)
{
// note row C bit 2 does something at POST ... some kind of test mode?
// note row D bit 2 does something at POST ... some kind of test mode?
static const char *const keynames[] = { "KEY0", "KEY1", "KEY2", "KEY3",
"KEY4", "KEY5", "KEY6", "KEY7",
"KEY8", "KEY9", "KEYA", "KEYB",
@ -1125,42 +1125,6 @@ READ8_MEMBER(pc88va_state::no_subfdc_r)
}
#endif
/* TODO: identify or emulate this DMAC */
READ8_MEMBER(pc88va_state::pc88va_dma_r)
{
/*
0: undefined
1: ---x ---- mode
---- xxxx select channel (bit-wise)
2/3: xxxx xxxx count
4/5: xxxx xxxx address
6: ---- xxxx address
8: ???? ???? Device control Register
A: ???? ???? Mode control Register
B: ???? ???? Status Register (r/o)
F: xxxx xxxx Mask Register
*/
return 0;
}
WRITE8_MEMBER(pc88va_state::pc88va_dma_w)
{
switch(offset)
{
case 0x00: printf("DMA reset %02x\n",data & 1); break;
case 0x01: printf("DMA select channel %02x mode channel %02x\n",data & 3,(data & 4) >> 2); break;
case 0x02: printf("DMA count 7-0 %02x\n",data); break;
case 0x03: printf("DMA count 15-8 %02x\n",data); break;
case 0x04: printf("DMA address 7-0 %02x\n",data); break;
case 0x05: printf("DMA address 15-8 %02x\n",data); break;
case 0x06: printf("DMA address 19-16 %02x\n",data); break;
case 0x08: printf("DMA Device control register %02x\n",data); break;
case 0x0a: printf("DMA Mode control register %02x\n",data); break;
case 0x0f: printf("DMA Mask register %02x\n",data); break;
}
}
static ADDRESS_MAP_START( pc88va_io_map, AS_IO, 16, pc88va_state )
AM_RANGE(0x0000, 0x000f) AM_READ8(key_r,0xffff) // Keyboard ROW reading
// AM_RANGE(0x0010, 0x0010) Printer / Calendar Clock Interface
@ -1211,7 +1175,7 @@ static ADDRESS_MAP_START( pc88va_io_map, AS_IO, 16, pc88va_state )
AM_RANGE(0x0156, 0x0157) AM_READ8(rom_bank_r,0x00ff) // ROM bank status
// AM_RANGE(0x0158, 0x0159) Interruption Mode Modification
// AM_RANGE(0x015c, 0x015f) NMI mask port (strobe port)
AM_RANGE(0x0160, 0x016f) AM_READWRITE8(pc88va_dma_r,pc88va_dma_w,0xffff) // DMA Controller
AM_RANGE(0x0160, 0x016f) AM_DEVREADWRITE8_LEGACY("dmac", upd71071_r, upd71071_w,0xffff) // DMA Controller
AM_RANGE(0x0184, 0x0187) AM_DEVREADWRITE8_LEGACY("pic8259_slave", pic8259_r, pic8259_w, 0x00ff)
AM_RANGE(0x0188, 0x018b) AM_DEVREADWRITE8_LEGACY("pic8259_master", pic8259_r, pic8259_w, 0x00ff) // ICU, also controls 8214 emulation
// AM_RANGE(0x0190, 0x0191) System Port 5
@ -1456,8 +1420,8 @@ static INPUT_PORTS_START( pc88va )
PORT_START("SYSOP_SW")
PORT_DIPNAME( 0x03, 0x01, "System Operational Mode" )
// PORT_DIPSETTING( 0x00, "Reserved" )
PORT_DIPSETTING( 0x02, "N88 V1 Mode" )
PORT_DIPSETTING( 0x01, "N88 V2 Mode" )
PORT_DIPSETTING( 0x02, "N88 V1 Mode" )
// PORT_DIPSETTING( 0x03, "???" )
INPUT_PORTS_END
@ -1723,6 +1687,15 @@ static const ym2203_interface pc88va_ym2203_intf =
DEVCB_NULL
};
/* ch2 is FDC, ch0/3 are "user". ch1 is unused */
static const upd71071_intf pc88va_dma_config =
{
"maincpu",
8000000,
{ 0, 0, 0, 0 },
{ 0, 0, 0, 0 }
};
static const floppy_format_type pc88va_floppy_formats[] = {
FLOPPY_XDF_FORMAT,
FLOPPY_MFI_FORMAT,
@ -1767,6 +1740,8 @@ static MACHINE_CONFIG_START( pc88va, pc88va_state )
MCFG_PIC8259_ADD( "pic8259_master", pc88va_pic8259_master_config )
MCFG_PIC8259_ADD( "pic8259_slave", pc88va_pic8259_slave_config )
MCFG_UPD71071_ADD("dmac",pc88va_dma_config)
MCFG_UPD765A_ADD("upd765", false, true)
MCFG_FLOPPY_DRIVE_ADD("upd765:0", pc88va_floppies, "525hd", 0, pc88va_floppy_formats)
MCFG_FLOPPY_DRIVE_ADD("upd765:1", pc88va_floppies, "525hd", 0, pc88va_floppy_formats)