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MMR0 in byte mode

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folkert van heusden 2023-03-23 09:14:50 +01:00
parent 8a3594ec47
commit 45890daf75
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
1 changed files with 20 additions and 2 deletions
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22
bus.cpp
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@ -246,6 +246,15 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev,
if (!peek_only) DOLOG(debug, false, "readb micropgrogram break register (high: %03o)", microprogram_break_register >> 8);
return microprogram_break_register >> 8;
}
if (a == ADDR_MMR0) {
if (!peek_only) DOLOG(debug, false, "read MMR0 LO");
return MMR0 & 255;
}
if (a == ADDR_MMR0 + 1) {
if (!peek_only) DOLOG(debug, false, "read MMR0 HI");
return MMR0 >> 8;
}
}
else {
if (a == ADDR_MMR0) {
@ -680,6 +689,17 @@ void bus::write(const uint16_t a, const bool word_mode, uint16_t value, const bo
microprogram_break_register = (microprogram_break_register & 0x00ff) | (value << 8);
return;
}
if (a == ADDR_MMR0) { // MMR0
DOLOG(debug, true, "write set MMR0: %o", value);
MMR0 = (MMR0 & 0xff00) | value;
return;
}
if (a == ADDR_MMR0 + 1) { // MMR0
DOLOG(debug, true, "write set MMR0: %o", value);
MMR0 = (MMR0 & 0x00ff) | (value << 8);
return;
}
}
else {
if (a == ADDR_PSW) { // PSW
@ -746,9 +766,7 @@ void bus::write(const uint16_t a, const bool word_mode, uint16_t value, const bo
if (a == ADDR_MMR0) { // MMR0
DOLOG(debug, true, "write set MMR0: %o", value);
setMMR0(value);
return;
}