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a few changes to the 3d buffer code.. no improvements, but might make development easier.

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This commit is contained in:
davidhay 2009-05-03 18:36:52 +00:00
parent cae3430d26
commit cc5f71a1be
1 changed files with 24 additions and 12 deletions
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36
src/mame/drivers/hng64.c
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@ -806,6 +806,8 @@ static WRITE32_HANDLER( hng64_3d_2_w )
// The 3d 'display list'
// is it a fifo?
// sams64 / sams64_2 access it in a very different way to fatal fury...
static WRITE32_HANDLER( dl_w )
{
COMBINE_DATA (&hng64_dl[offset]) ;
@ -816,15 +818,7 @@ static WRITE32_HANDLER( dl_w )
// the problem is when there are a lot of things to be drawn (more than what can fit in 2*0x80)
// the list doesn't fit anymore, and parts aren't drawn every frame.
if (offset == 0x85)
{
// Only if it's VALID
if ((INT32)hng64_dl[offset] == 1 || (INT32)hng64_dl[offset] == 2)
activeBuffer = (INT32)hng64_dl[offset] - 1 ; // Subtract 1 to fit into my array...
}
if (offset <= 0x80)
hng64_dls[activeBuffer][offset] = hng64_dl[offset] ;
// For some reason, if the value at 0x86 and'ed with 0x02 is non-zero, the software just keeps
// checking 0x86 until and'ing it with 2 returns 0... What could change 0x86 if cpu0 is in this infinite loop?
@ -840,14 +834,31 @@ static WRITE32_HANDLER( dl_w )
static READ32_HANDLER( dl_r )
{
// A read of 0x86 ONLY happens if there are more display lists than what are readily available.
// (PC = 8006fe1c)
// mame_printf_debug("dl R (%08x) : %x %x\n", cpu_get_pc(space->cpu), offset, hng64_dl[offset]) ;
// usrintf_showmessage("dl R (%08x) : %x %x", cpu_get_pc(space->cpu), offset, hng64_dl[offset]) ;
return hng64_dl[offset] ;
}
// A read at 0x20300217 ONLY happens if there are more display lists than what are readily available.
static WRITE32_HANDLER( dl_control_w )
{
if (activeBuffer==0 || activeBuffer==1)
memcpy(&hng64_dls[activeBuffer][0],&hng64_dl[0],0x200);
// Only if it's VALID
if (data == 1 || data == 2)
activeBuffer = data - 1;
// if (offset <= 0x80)
// hng64_dls[activeBuffer][offset] = hng64_dl[offset] ;
}
#ifdef UNUSED_FUNCTION
WRITE32_HANDLER( activate_3d_buffer )
{
@ -950,8 +961,9 @@ static ADDRESS_MAP_START( hng_map, ADDRESS_SPACE_PROGRAM, 32 )
AM_RANGE(0x20190000, 0x20190037) AM_RAM AM_BASE(&hng64_videoregs) // Video Registers
AM_RANGE(0x20200000, 0x20203fff) AM_READWRITE(SMH_RAM,hng64_pal_w) AM_BASE(&paletteram32) // Palette
AM_RANGE(0x20208000, 0x2020805f) AM_READWRITE(tcram_r, tcram_w) AM_BASE(&hng64_tcram) // Transition Control
AM_RANGE(0x20300000, 0x2030ffff) AM_READWRITE(dl_r, dl_w) AM_BASE(&hng64_dl) // 3d Display List
AM_RANGE(0x20300000, 0x203001ff) AM_WRITE(dl_w) AM_BASE(&hng64_dl) // 3d Display List
AM_RANGE(0x20300214, 0x20300217) AM_WRITE(dl_control_w)
// 3d?
// AM_RANGE(0x30000000, 0x3000002f) AM_READWRITE(q2_r, q2_w) AM_BASE(&hng64_q2)
AM_RANGE(0x30100000, 0x3015ffff) AM_READWRITE(hng64_3d_1_r,hng64_3d_2_w) AM_BASE(&hng64_3d_1) // 3D Display Buffer A