void TMS9928APostLoad()
{
for (int i = 0; i < 8; i++)
change_register(i, tms.Regs[i]);
if (tms.INTCallback) tms.INTCallback(tms.INT);
}
void TMS9928A_post_load (running_machine &machine) {
int i;
/* all registers need to be re-written, so tables are recalculated */
for (i=0;i<8;i++)
change_register (machine, i, tms.Regs[i]);
/* make sure the interrupt request is set properly */
if (tms.INTCallback) tms.INTCallback (machine, tms.INT);
}
unsigned char TMS9928AReadRegs()
{
int b = tms.StatusReg;
tms.StatusReg = 0x1f;
if (tms.INT) {
tms.INT = 0;
if (tms.INTCallback) tms.INTCallback (tms.INT);
}
tms.latch = 0;
return b;
}
void TMS9928A_post_load (void) {
int i;
/* mark the screen as dirty */
_TMS9928A_set_dirty (1);
/* all registers need to be re-written, so tables are recalculated */
for (i=0;i<8;i++)
_TMS9928A_change_register (i, tms.Regs[i]);
/* make sure the back ground colour is reset */
tms.BackColour = -1;
/* make sure the interrupt request is set properly */
if (tms.INTCallback) tms.INTCallback (tms.INT);
}
int TMS9928A_interrupt(running_machine &machine) {
int b;
/* when skipping frames, calculate sprite collision */
if (machine.video().skip_this_frame()) {
if (TMS_SPRITES_ENABLED) {
draw_sprites (machine.primary_screen, NULL, NULL);
}
}
tms.StatusReg |= 0x80;
b = (tms.Regs[1] & 0x20) != 0;
if (b != tms.INT) {
tms.INT = b;
if (tms.INTCallback) tms.INTCallback (machine, tms.INT);
}
return b;
}
static void change_register(int reg, unsigned char val)
{
static const unsigned char Mask[8] = { 0x03, 0xfb, 0x0f, 0xff, 0x07, 0x7f, 0x07, 0xff };
val &= Mask[reg];
if(tms.Regs[reg] != val)
{
tms.Regs[reg] = val;
switch (reg)
{
case 0:
{
if (val & 2) {
tms.colour = ((tms.Regs[3] & 0x80) * 64) & (tms.vramsize - 1);
tms.colourmask = (tms.Regs[3] & 0x7f) * 8 | 7;
tms.pattern = ((tms.Regs[4] & 4) * 2048) & (tms.vramsize - 1);
tms.patternmask = (tms.Regs[4] & 3) * 256 | (tms.colourmask & 255);
} else {
tms.colour = (tms.Regs[3] * 64) & (tms.vramsize - 1);
tms.pattern = (tms.Regs[4] * 2048) & (tms.vramsize - 1);
}
}
break;
case 1:
{
int b = (val & 0x20) && (tms.StatusReg & 0x80);
if (b != tms.INT) {
tms.INT = b;
if (tms.INTCallback) tms.INTCallback (tms.INT);
}
}
break;
case 2:
tms.nametbl = (val * 1024) & (tms.vramsize - 1);
break;
case 3:
{
if (tms.Regs[0] & 2) {
tms.colour = ((val & 0x80) * 64) & (tms.vramsize - 1);
tms.colourmask = (val & 0x7f) * 8 | 7;
} else {
tms.colour = (val * 64) & (tms.vramsize - 1);
}
tms.patternmask = (tms.Regs[4] & 3) * 256 | (tms.colourmask & 255);
}
break;
case 4:
{
if (tms.Regs[0] & 2) {
tms.pattern = ((val & 4) * 2048) & (tms.vramsize - 1);
tms.patternmask = (val & 3) * 256 | 255;
} else {
tms.pattern = (val * 2048) & (tms.vramsize - 1);
}
}
break;
case 5:
tms.spriteattribute = (val * 128) & (tms.vramsize - 1);
break;
case 6:
tms.spritepattern = (val * 2048) & (tms.vramsize - 1);
break;
case 7:
/* The backdrop is updated at TMS9928A_refresh() */
break;
}
}
}
static void change_register (running_machine &machine, int reg, UINT8 val) {
static const UINT8 Mask[8] =
{ 0x03, 0xfb, 0x0f, 0xff, 0x07, 0x7f, 0x07, 0xff };
static const char *const modes[] = {
"Mode 0 (GRAPHIC 1)", "Mode 1 (TEXT 1)", "Mode 2 (GRAPHIC 2)",
"Mode 1+2 (TEXT 1 variation)", "Mode 3 (MULTICOLOR)",
"Mode 1+3 (BOGUS)", "Mode 2+3 (MULTICOLOR variation)",
"Mode 1+2+3 (BOGUS)"
};
UINT8 b;
val &= Mask[reg];
tms.Regs[reg] = val;
logerror("TMS9928A: Reg %d = %02xh\n", reg, (int)val);
switch (reg) {
case 0:
/* re-calculate masks and pattern generator & colour */
if (val & 2) {
tms.colour = ((tms.Regs[3] & 0x80) * 64) & (tms.vramsize - 1);
tms.colourmask = (tms.Regs[3] & 0x7f) * 8 | 7;
tms.pattern = ((tms.Regs[4] & 4) * 2048) & (tms.vramsize - 1);
tms.patternmask = (tms.Regs[4] & 3) * 256 |
(tms.colourmask & 255);
} else {
tms.colour = (tms.Regs[3] * 64) & (tms.vramsize - 1);
tms.pattern = (tms.Regs[4] * 2048) & (tms.vramsize - 1);
}
logerror("TMS9928A: %s\n", modes[TMS_MODE]);
break;
case 1:
/* check for changes in the INT line */
b = (val & 0x20) && (tms.StatusReg & 0x80) ;
if (b != tms.INT) {
tms.INT = b;
if (tms.INTCallback) tms.INTCallback (machine, tms.INT);
}
logerror("TMS9928A: %s\n", modes[TMS_MODE]);
break;
case 2:
tms.nametbl = (val * 1024) & (tms.vramsize - 1);
break;
case 3:
if (tms.Regs[0] & 2) {
tms.colour = ((val & 0x80) * 64) & (tms.vramsize - 1);
tms.colourmask = (val & 0x7f) * 8 | 7;
} else {
tms.colour = (val * 64) & (tms.vramsize - 1);
}
tms.patternmask = (tms.Regs[4] & 3) * 256 | (tms.colourmask & 255);
break;
case 4:
if (tms.Regs[0] & 2) {
tms.pattern = ((val & 4) * 2048) & (tms.vramsize - 1);
tms.patternmask = (val & 3) * 256 | 255;
} else {
tms.pattern = (val * 2048) & (tms.vramsize - 1);
}
break;
case 5:
tms.spriteattribute = (val * 128) & (tms.vramsize - 1);
break;
case 6:
tms.spritepattern = (val * 2048) & (tms.vramsize - 1);
break;
case 7:
/* The backdrop is updated at TMS9928A_refresh() */
break;
}
}