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vdp, kludge for z80 access

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This commit is contained in:
kub 2020-12-12 17:27:30 +01:00
parent a20300bf1e
commit 1613ec6c30
3 changed files with 28 additions and 27 deletions
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23
pico/videoport.c
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@ -362,13 +362,14 @@ static void VideoWrite(u16 d)
AutoIncrement();
}
static unsigned int VideoRead(void)
static unsigned int VideoRead(int is_from_z80)
{
unsigned int a, d = VdpFIFO.fifo_data[(VdpFIFO.fifo_dx+1)&3];
a=Pico.video.addr; a>>=1;
SekCyclesBurnRun(PicoVideoFIFORead());
if (!is_from_z80)
SekCyclesBurnRun(PicoVideoFIFORead());
switch (Pico.video.type)
{
case 0: d=PicoMem.vram [a & 0x7fff]; break;
@ -940,23 +941,23 @@ PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a)
if (a==0x00) // data port
{
return VideoRead();
return VideoRead(0);
}
return 0;
}
unsigned char PicoVideoRead8DataH(void)
unsigned char PicoVideoRead8DataH(int is_from_z80)
{
return VideoRead() >> 8;
return VideoRead(is_from_z80) >> 8;
}
unsigned char PicoVideoRead8DataL(void)
unsigned char PicoVideoRead8DataL(int is_from_z80)
{
return VideoRead();
return VideoRead(is_from_z80);
}
unsigned char PicoVideoRead8CtlH(void)
unsigned char PicoVideoRead8CtlH(int is_from_z80)
{
struct PicoVideo *pv = &Pico.video;
u8 d = VideoSr(pv) >> 8;
@ -968,7 +969,7 @@ unsigned char PicoVideoRead8CtlH(void)
return d;
}
unsigned char PicoVideoRead8CtlL(void)
unsigned char PicoVideoRead8CtlL(int is_from_z80)
{
struct PicoVideo *pv = &Pico.video;
u8 d = VideoSr(pv);
@ -980,14 +981,14 @@ unsigned char PicoVideoRead8CtlL(void)
return d;
}
unsigned char PicoVideoRead8HV_H(void)
unsigned char PicoVideoRead8HV_H(int is_from_z80)
{
elprintf(EL_HVCNT, "vcounter: %02x [%u] @ %06x", Pico.video.v_counter, SekCyclesDone(), SekPc);
return Pico.video.v_counter;
}
// FIXME: broken
unsigned char PicoVideoRead8HV_L(void)
unsigned char PicoVideoRead8HV_L(int is_from_z80)
{
u32 d = (SekCyclesDone() - Pico.t.m68c_line_start) & 0x1ff; // FIXME
if (Pico.video.reg[0]&2)