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some poor timing improvement attempts

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This commit is contained in:
notaz 2017-10-01 01:29:08 +03:00
parent 75b84e4b7c
commit d1b8bcc634
2 changed files with 8 additions and 2 deletions
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6
pico/memory.c
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@ -1195,6 +1195,8 @@ void PicoWrite16_32x(u32 a, u32 d) {}
static unsigned char z80_md_vdp_read(unsigned short a) static unsigned char z80_md_vdp_read(unsigned short a)
{ {
z80_subCLeft(2);
if ((a & 0x00f0) == 0x0000) { if ((a & 0x00f0) == 0x0000) {
switch (a & 0x0d) switch (a & 0x0d)
{ {
@ -1218,8 +1220,10 @@ static unsigned char z80_md_bank_read(unsigned short a)
unsigned int addr68k; unsigned int addr68k;
unsigned char ret; unsigned char ret;
z80_subCLeft(3);
addr68k = Pico.m.z80_bank68k << 15; addr68k = Pico.m.z80_bank68k << 15;
addr68k += a & 0x7fff; addr68k |= a & 0x7fff;
ret = m68k_read8(addr68k); ret = m68k_read8(addr68k);

2
pico/pico_int.h
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@ -185,6 +185,7 @@ extern struct DrZ80 drZ80;
#define z80_nmi() drZ80.Z80IF |= 8 #define z80_nmi() drZ80.Z80IF |= 8
#define z80_cyclesLeft drZ80.cycles #define z80_cyclesLeft drZ80.cycles
#define z80_subCLeft(c) drZ80.cycles -= c
#define z80_pc() (drZ80.Z80PC - drZ80.Z80PC_BASE) #define z80_pc() (drZ80.Z80PC - drZ80.Z80PC_BASE)
#elif defined(_USE_CZ80) #elif defined(_USE_CZ80)
@ -196,6 +197,7 @@ extern struct DrZ80 drZ80;
#define z80_nmi() Cz80_Set_IRQ(&CZ80, IRQ_LINE_NMI, 0) #define z80_nmi() Cz80_Set_IRQ(&CZ80, IRQ_LINE_NMI, 0)
#define z80_cyclesLeft (CZ80.ICount - CZ80.ExtraCycles) #define z80_cyclesLeft (CZ80.ICount - CZ80.ExtraCycles)
#define z80_subCLeft(c) CZ80.ICount -= c
#define z80_pc() Cz80_Get_Reg(&CZ80, CZ80_PC) #define z80_pc() Cz80_Get_Reg(&CZ80, CZ80_PC)
#else #else