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added basic stuff for Z80CTC, I'm assuming this is used as support for a DAC sound system possibly even timing of the whole game. if it waits on the z80?

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not hooked it up yet, ran out of ran out of time for now, if anybody fancies improving the driver this evening / tomorrow then feel free, it's interesting at least :-)
This commit is contained in:
David Haywood 2014-02-21 15:58:57 +00:00
parent 0cd66d1b4e
commit 4775726c1f
1 changed files with 37 additions and 6 deletions
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43
src/mame/drivers/megaphx.c
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@ -16,6 +16,7 @@
Actel A1010A-PL68C (custom blitter maybe?)
2x 8 DSW, bottom corner, away from everything..
Sub / Sound board:
@ -37,7 +38,7 @@
#include "cpu/z80/z80.h"
#include "video/ramdac.h"
#include "machine/i8255.h"
#include "machine/z80ctc.h"
class megaphx_state : public driver_device
{
@ -46,12 +47,14 @@ public:
: driver_device(mconfig, type, tag),
m_maincpu(*this, "maincpu"),
m_mainram(*this, "mainram"),
m_vram(*this, "vram")
m_vram(*this, "vram"),
m_ctc(*this, "ctc")
{ }
required_device<cpu_device> m_maincpu;
required_shared_ptr<UINT16> m_mainram;
required_shared_ptr<UINT16> m_vram;
required_device<z80ctc_device> m_ctc;
DECLARE_DRIVER_INIT(megaphx);
@ -63,6 +66,9 @@ public:
DECLARE_READ16_MEMBER(tms_host_r);
DECLARE_WRITE16_MEMBER(tms_host_w);
DECLARE_WRITE_LINE_MEMBER(z80ctc_to0);
DECLARE_WRITE_LINE_MEMBER(z80ctc_to1);
DECLARE_WRITE_LINE_MEMBER(z80ctc_to2);
};
@ -95,7 +101,7 @@ static ADDRESS_MAP_START( megaphx_68k_map, AS_PROGRAM, 16, megaphx_state )
AM_RANGE(0x040000, 0x040007) AM_READWRITE(tms_host_r, tms_host_w)
// AM_RANGE(0x050000, 0x050001) AM_WRITENOP
AM_RANGE(0x050000, 0x050001) AM_WRITENOP
AM_RANGE(0x050002, 0x050003) AM_READ_PORT("P3")
@ -140,7 +146,7 @@ static void megaphx_scanline(screen_device &screen, bitmap_rgb32 &bitmap, int sc
{
megaphx_state *state = screen.machine().driver_data<megaphx_state>();
UINT16 *vram = &state->m_vram[(params->rowaddr << 8) & 0x1ff00];
UINT16 *vram = &state->m_vram[(params->rowaddr << 8) & 0x3ff00];
UINT32 *dest = &bitmap.pix32(scanline);
const pen_t *paldata = screen.machine().pens;
@ -330,6 +336,31 @@ static I8255A_INTERFACE( ppi8255_intf_0 )
WRITE_LINE_MEMBER(megaphx_state::z80ctc_to0)
{
printf("z80ctc_to0 %d\n", state);
}
WRITE_LINE_MEMBER(megaphx_state::z80ctc_to1)
{
printf("z80ctc_to1 %d\n", state);
}
WRITE_LINE_MEMBER(megaphx_state::z80ctc_to2)
{
printf("z80ctc_to2 %d\n", state);
}
static Z80CTC_INTERFACE( z80ctc_intf )
{
DEVCB_CPU_INPUT_LINE("audiocpu", INPUT_LINE_IRQ0), // interrupt handler
DEVCB_DEVICE_LINE_MEMBER("ctc", megaphx_state, z80ctc_to0), // ZC/TO0 callback
DEVCB_DEVICE_LINE_MEMBER("ctc", megaphx_state, z80ctc_to1), // ZC/TO1 callback
DEVCB_DEVICE_LINE_MEMBER("ctc", megaphx_state, z80ctc_to2) // ZC/TO2 callback
};
static MACHINE_CONFIG_START( megaphx, megaphx_state )
MCFG_CPU_ADD("maincpu", M68000, 8000000) // ?? can't read xtal due to reflections, CPU is an 8Mhz part
@ -346,7 +377,7 @@ static MACHINE_CONFIG_START( megaphx, megaphx_state )
MCFG_CPU_IO_MAP(sound_io)
MCFG_I8255A_ADD( "ppi8255_0", ppi8255_intf_0 )
MCFG_Z80CTC_ADD( "ctc", 4000000, z80ctc_intf ) // unk freq
MCFG_MACHINE_RESET_OVERRIDE(megaphx_state,megaphx)
@ -366,7 +397,7 @@ DRIVER_INIT_MEMBER(megaphx_state,megaphx)
{
UINT16 *src = (UINT16*)memregion( "roms67" )->base();
// copy vector table?
memcpy(m_mainram, src, 0x100);
memcpy(m_mainram, src, 0x10000);
}