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@@ -32,6 +32,7 @@ static unsigned char vdp_ctl_read(void)
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struct PicoVideo *pv = &Pico.video;
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unsigned char d;
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+ z80_int_assert(0);
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d = pv->status | (pv->pending_ints << 7);
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pv->pending = pv->pending_ints = 0;
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pv->status = 0;
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@@ -55,14 +56,34 @@ static void vdp_data_write(unsigned char d)
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pv->pending = 0;
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}
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-static void vdp_ctl_write(unsigned char d)
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+static NOINLINE void vdp_reg_write(struct PicoVideo *pv, u8 a, u8 d)
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+{
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+ int l;
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+
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+ pv->reg[a] = d;
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+ switch (a) {
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+ case 0:
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+ l = pv->pending_ints & (d >> 3) & 2;
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+ elprintf(EL_INTS, "hint %d", l);
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+ z80_int_assert(l);
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+ break;
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+ case 1:
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+ l = pv->pending_ints & (d >> 5) & 1;
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+ elprintf(EL_INTS, "vint %d", l);
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+ z80_int_assert(l);
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+ break;
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+ }
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+}
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+
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+static void vdp_ctl_write(u8 d)
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{
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struct PicoVideo *pv = &Pico.video;
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if (pv->pending) {
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if ((d >> 6) == 2) {
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- pv->reg[d & 0x0f] = pv->addr;
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elprintf(EL_IO, " VDP r%02x=%02x", d & 0x0f, pv->addr & 0xff);
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+ if (pv->reg[d & 0x0f] != (u8)pv->addr)
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+ vdp_reg_write(pv, d & 0x0f, pv->addr);
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}
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pv->type = d >> 6;
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pv->addr &= 0x00ff;
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@@ -287,7 +308,7 @@ void PicoFrameMS(void)
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pv->pending_ints |= 2;
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if (pv->reg[0] & 0x10) {
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elprintf(EL_INTS, "hint");
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- z80_int();
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+ z80_int_assert(1);
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}
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}
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}
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@@ -295,7 +316,7 @@ void PicoFrameMS(void)
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pv->pending_ints |= 1;
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if (pv->reg[1] & 0x20) {
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elprintf(EL_INTS, "vint");
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- z80_int();
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+ z80_int_assert(1);
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}
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}
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