struct PicoVideo *pv = &Pico.video;
unsigned char d;
+ z80_int_assert(0);
d = pv->status | (pv->pending_ints << 7);
pv->pending = pv->pending_ints = 0;
pv->status = 0;
pv->pending = 0;
}
-static void vdp_ctl_write(unsigned char d)
+static NOINLINE void vdp_reg_write(struct PicoVideo *pv, u8 a, u8 d)
+{
+ int l;
+
+ pv->reg[a] = d;
+ switch (a) {
+ case 0:
+ l = pv->pending_ints & (d >> 3) & 2;
+ elprintf(EL_INTS, "hint %d", l);
+ z80_int_assert(l);
+ break;
+ case 1:
+ l = pv->pending_ints & (d >> 5) & 1;
+ elprintf(EL_INTS, "vint %d", l);
+ z80_int_assert(l);
+ break;
+ }
+}
+
+static void vdp_ctl_write(u8 d)
{
struct PicoVideo *pv = &Pico.video;
if (pv->pending) {
if ((d >> 6) == 2) {
- pv->reg[d & 0x0f] = pv->addr;
elprintf(EL_IO, " VDP r%02x=%02x", d & 0x0f, pv->addr & 0xff);
+ if (pv->reg[d & 0x0f] != (u8)pv->addr)
+ vdp_reg_write(pv, d & 0x0f, pv->addr);
}
pv->type = d >> 6;
pv->addr &= 0x00ff;
pv->pending_ints |= 2;
if (pv->reg[0] & 0x10) {
elprintf(EL_INTS, "hint");
- z80_int();
+ z80_int_assert(1);
}
}
}
pv->pending_ints |= 1;
if (pv->reg[1] & 0x20) {
elprintf(EL_INTS, "vint");
- z80_int();
+ z80_int_assert(1);
}
}