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Tagged with instruction-set emulation
3
questions
4
votes
1
answer
170
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Are there any CHIP-8 games that break if `SAVE` / `RESTORE` *doesn't* change the pointer register?
The CHIP-8 instructions SAVE Vx (Fx55) and RESTORE Vx (Fx65) are originally specified to increment the pointer register I as each register is saved/loaded, so by the end of the instruction, the value ...
- 2,760
-4
votes
4
answers
952
views
Operating systems which have non-x86 instruction set architecture [closed]
What are the most famous operating systems for non-x86 computers? I mean, most famous OS which have different instruction set architecture.
Background (to better understand my task):
I ask this ...
- 263
9
votes
3
answers
2k
views
Intel 8080 - Behaviour of the carry bit when comparing a value with 0
I'm in the process of writing an emulator for the Intel 8080.
The description of the CMP instruction from Intel's 8080 programming manual (see page 20) says the following:
The specified byte is ...
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