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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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20
pico/memory.c
View file

@ -696,14 +696,14 @@ u32 PicoRead8_vdp(u32 a)
if ((a & 0x00f0) == 0x0000) {
switch (a & 0x0d)
{
case 0x00: return PicoVideoRead8DataH();
case 0x01: return PicoVideoRead8DataL();
case 0x04: return PicoVideoRead8CtlH();
case 0x05: return PicoVideoRead8CtlL();
case 0x00: return PicoVideoRead8DataH(0);
case 0x01: return PicoVideoRead8DataL(0);
case 0x04: return PicoVideoRead8CtlH(0);
case 0x05: return PicoVideoRead8CtlL(0);
case 0x08:
case 0x0c: return PicoVideoRead8HV_H();
case 0x0c: return PicoVideoRead8HV_H(0);
case 0x09:
case 0x0d: return PicoVideoRead8HV_L();
case 0x0d: return PicoVideoRead8HV_L(0);
}
}
@ -1195,10 +1195,10 @@ static unsigned char z80_md_vdp_read(unsigned short a)
if ((a & 0x00f0) == 0x0000) {
switch (a & 0x0d)
{
case 0x00: return PicoVideoRead8DataH();
case 0x01: return PicoVideoRead8DataL();
case 0x04: return PicoVideoRead8CtlH();
case 0x05: return PicoVideoRead8CtlL();
case 0x00: return PicoVideoRead8DataH(1);
case 0x01: return PicoVideoRead8DataL(1);
case 0x04: return PicoVideoRead8CtlH(1);
case 0x05: return PicoVideoRead8CtlL(1);
case 0x08:
case 0x0c: return get_scanline(1); // FIXME: make it proper
case 0x09:

12
pico/pico_int.h
View file

@ -864,12 +864,12 @@ static __inline void VideoWriteVRAM(u32 a, u16 d)
PICO_INTERNAL_ASM void PicoVideoWrite(unsigned int a,unsigned short d);
PICO_INTERNAL_ASM unsigned int PicoVideoRead(unsigned int a);
unsigned char PicoVideoRead8DataH(void);
unsigned char PicoVideoRead8DataL(void);
unsigned char PicoVideoRead8CtlH(void);
unsigned char PicoVideoRead8CtlL(void);
unsigned char PicoVideoRead8HV_H(void);
unsigned char PicoVideoRead8HV_L(void);
unsigned char PicoVideoRead8DataH(int is_from_z80);
unsigned char PicoVideoRead8DataL(int is_from_z80);
unsigned char PicoVideoRead8CtlH(int is_from_z80);
unsigned char PicoVideoRead8CtlL(int is_from_z80);
unsigned char PicoVideoRead8HV_H(int is_from_z80);
unsigned char PicoVideoRead8HV_L(int is_from_z80);
extern int (*PicoDmaHook)(unsigned int source, int len, unsigned short **base, unsigned int *mask);
void PicoVideoFIFOSync(int cycles);
int PicoVideoFIFOHint(void);

21
pico/videoport.c
View file

@ -362,12 +362,13 @@ 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;
if (!is_from_z80)
SekCyclesBurnRun(PicoVideoFIFORead());
switch (Pico.video.type)
{
@ -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)