mirror of https://github.com/bsnes-emu/bsnes.git
55 lines
1011 B
C++
55 lines
1011 B
C++
auto VCE::read(uint3 addr) -> uint8 {
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if(addr == 0x04) {
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//CTR
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uint8 data = cram.read(cram.address).bits(0,7);
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return data;
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}
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if(addr == 0x05) {
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//CTR
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uint1 data = cram.read(cram.address).bit(8);
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cram.address++;
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return 0xfe | data;
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}
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return 0xff;
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}
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auto VCE::write(uint3 addr, uint8 data) -> void {
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if(addr == 0x00) {
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//CR
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if(data.bits(0,1) == 0) io.clock = 4;
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if(data.bits(0,1) == 1) io.clock = 3;
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if(data.bits(0,1) == 2) io.clock = 2;
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if(data.bits(0,1) == 3) io.clock = 2;
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io.extraLine = data.bit(2);
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io.grayscale = data.bit(7);
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return;
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}
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if(addr == 0x02) {
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//CTA
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cram.address.bits(0,7) = data.bits(0,7);
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return;
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}
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if(addr == 0x03) {
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//CTA
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cram.address.bit(8) = data.bit(0);
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return;
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}
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if(addr == 0x04) {
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//CTW
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cram.write(cram.address, 0, data.bits(0,7));
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return;
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}
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if(addr == 0x05) {
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//CTW
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cram.write(cram.address, 1, data.bit(0));
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cram.address++;
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return;
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}
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}
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