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Fixed ROM bank for the blitter, one bug left (layer clearance on ranking screen, which I suspect is something to do with the blitter drawing itself) (nw)

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This commit is contained in:
Angelo Salese 2015-03-25 03:19:11 +01:00
parent 4cc517fb20
commit 4f599605f8
1 changed files with 19 additions and 12 deletions
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31
src/mame/drivers/ttchamp.c
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@ -90,6 +90,7 @@ public:
UINT16 m_port10;
UINT8 m_rombank;
DECLARE_DRIVER_INIT(ttchamp);
@ -104,7 +105,6 @@ public:
UINT16 m_mainram[0x10000 / 2];
int m_spritesinit;
@ -299,8 +299,9 @@ WRITE16_MEMBER(ttchamp_state::ttchamp_mem_w)
{
// printf("%06x: spider_blitter_w %08x %04x %04x (init2) (width?)\n", space.device().safe_pc(), offset * 2, data, mem_mask);
m_spriteswidth = offset & 0xff;
//printf("%08x\n",(offset*2) & 0xfff00);
m_spritesinit = 0;
m_spritesinit = 3;
}
else
{
@ -314,12 +315,20 @@ WRITE16_MEMBER(ttchamp_state::ttchamp_mem_w)
}
else if ((offset >= 0x30000 / 2) && (offset < 0x40000 / 2))
{
if(m_spritesinit != 3)
{
printf("blitter bus write but blitter unselected? %08x %04x\n",offset*2,data);
return;
}
m_spritesinit = 0;
// 0x30000-0x3ffff used, on Spider it's 0x20000-0x2ffff
offset &= 0x7fff;
UINT8 *src = m_rom8;
if (m_port10 & 2) // NO, wrong for the portraits
if (m_rombank)
src += 0x100000;
// printf("%06x: spider_blitter_w %08x %04x %04x (previous data width %d address %08x)\n", space.device().safe_pc(), offset * 2, data, mem_mask, m_spriteswidth, m_spritesaddr);
@ -371,8 +380,10 @@ static ADDRESS_MAP_START( ttchamp_map, AS_PROGRAM, 16, ttchamp_state )
AM_RANGE(0x00000, 0xfffff) AM_READWRITE(ttchamp_mem_r, ttchamp_mem_w)
ADDRESS_MAP_END
/* Re-use same parameters as before (one-shot) */
READ16_MEMBER(ttchamp_state::port1e_r)
{
m_spritesinit = 3;
return 0xff;
}
@ -401,26 +412,22 @@ WRITE16_MEMBER(ttchamp_state::port10_w)
printf("Check me, i/o 0x10 used with %02x\n",res);
}
/* selects upper bank for the blitter */
WRITE16_MEMBER(ttchamp_state::port20_w)
{
printf("%06x: port20_w %04x %04x\n", space.device().safe_pc(), data, mem_mask);
// seems to somehow be tied to layer clear
// might also depend on layer selected with 0x10 tho? written after it
/*for (int i = 0; i < 0x8000; i++)
{
// m_videoram0[i] = 0x0000;
m_videoram2[i] = 0x0000;
}*/
m_rombank = 1;
}
/* selects lower bank for the blitter */
WRITE16_MEMBER(ttchamp_state::port62_w)
{
printf("%06x: port62_w %04x %04x\n", space.device().safe_pc(), data, mem_mask);
m_rombank = 0;
}
static ADDRESS_MAP_START( ttchamp_io, AS_IO, 16, ttchamp_state )
AM_RANGE(0x0000, 0x0001) AM_WRITENOP // startup only
AM_RANGE(0x0000, 0x0001) AM_WRITENOP // startup only, nmi enable?
AM_RANGE(0x0002, 0x0003) AM_READ_PORT("SYSTEM")
AM_RANGE(0x0004, 0x0005) AM_READ_PORT("P1_P2")