New answers tagged 6800
6
votes
about flag changes in 16-bit calculations on the MC6800
You may find it confusing, because different MCUs do it differently.
The old M6800 MCUs do it as two unrelated 8-bit operations, but newer M6801 MCUs do it as a real 16-bit operation, and so do the ...
- 35.6k
10
votes
Accepted
about flag changes in 16-bit calculations on the MC6800
A quick web research revealed the Motorola "M6800 PROGRAMMING REFERENCE MANUAL" at the Internet Archive.
For CPX it says:
That leaves little to be desired.
Just for completeness, for LDX it ...
- 1,393
4
votes
about flag changes in 16-bit calculations on the MC6800
While I myself has very little knowledge of MC6800, I can recommend using this netlist-level emulator http://visual6502.org/JSSim/expert-6800.html as the ultimate reference. It emulates real ...
- 10.9k
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