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- TMS34010: Use the CONVSP/CONVDP registers to adjust source and destination addresses when window clipping or y-reverse is applied [Phil Bennett]

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This commit is contained in:
Phil Bennett 2014-04-23 08:18:34 +00:00
parent 31bed06699
commit 9ca8643f32
1 changed files with 9 additions and 9 deletions
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18
src/emu/cpu/tms34010/34010gfx.c
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@ -111,11 +111,9 @@ static int apply_window(tms34010_state *tms, const char *inst_name,int srcbpp, U
diff = WSTART_Y(tms) - sy;
if (diff > 0)
{
#if 1
if (sy>=0) // littlerb and megaphx need this check for many items leaving / entering the top of the playfield with negative sy coordinates eg. jam jars, keys in littlerb, player shots, stage 2/3 birds in megaphx. battletoads requires the code to execute for positive sy co-ordinates eg. screen after player select
if (srcaddr)
*srcaddr += diff * SPTCH(tms);
#endif
if (srcaddr)
*srcaddr += diff * tms->convsp;
sy += diff;
SET_V_LOG(tms, 1);
}
@ -1099,11 +1097,13 @@ static void FUNCTION_NAME(pixblt)(tms34010_state *tms, int src_is_linear, int ds
/* handle flipping the addresses */
yreverse = (IOREG(tms, REG_CONTROL) >> 9) & 1;
if (!src_is_linear || !dst_is_linear)
{
if (yreverse)
{
saddr += (dy - 1) * SPTCH(tms);
daddr += (dy - 1) * DPTCH(tms);
saddr += (dy - 1) * tms->convsp;
daddr += (dy - 1) * tms->convdp;
}
}
tms->st |= STBIT_P;
@ -1453,8 +1453,8 @@ if ((daddr & (BITS_PER_PIXEL - 1)) != 0) osd_printf_debug("PIXBLT_R%d with odd d
daddr += dx * BITS_PER_PIXEL;
if (yreverse)
{
saddr += (dy - 1) * SPTCH(tms);
daddr += (dy - 1) * DPTCH(tms);
saddr += (dy - 1) * tms->convsp;
daddr += (dy - 1) * tms->convdp;
}
}