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24 lines
614 B
C++
24 lines
614 B
C++
#ifdef SA1_CPP
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//ROM, I-RAM and MMIO registers are accessed at ~10.74MHz (2 clock ticks)
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//BW-RAM is accessed at ~5.37MHz (4 clock ticks)
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//tick() == 2 clock ticks
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//note: bus conflict delays are not emulated at this time
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void SA1::op_io() {
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tick();
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}
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uint8 SA1::op_read(unsigned addr) {
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tick();
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if(((addr & 0x40e000) == 0x006000) || ((addr & 0xd00000) == 0x400000)) tick();
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return regs.mdr = sa1bus.read(addr);
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}
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void SA1::op_write(unsigned addr, uint8 data) {
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tick();
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if(((addr & 0x40e000) == 0x006000) || ((addr & 0xd00000) == 0x400000)) tick();
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sa1bus.write(addr, regs.mdr = data);
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}
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#endif
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