Emulator Status LEDs
I was playing with Rich Cini's Altair32 emulator and noticed that the status LEDs change when I single step. According to the theory of operations manual, the Altair stops and steps only at instruction fetch cycles. So the status LEDs should always be the same after a step, reflecting the status for an instruction fetch: MEMR is on, M1 is on, WO is on.
This video shows this behavior: http://www.youtube.com/watch?v=vAhp_LzvSWk It looks like the emulator doesn't handle the status LEDs correctly. Anyone with a working Altair care to confirm this? |
Quote:
Geoff. |
That explains it.
Actually, from the point of view of understanding how the 8080 CPU works and looking at the status lines, stepping one machine cycle at a time is better. I agree the emulator is a great tool. It's also great that he's collected so much of the original software ready to run on an Altair into one package. |
All times are GMT. The time now is 03:57 AM. |
Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.