Corey986
Administrator
Ok here is the dilemma, I’m working on hooking up an OP-80A to an ALTAIR. The challenge I have is the IO card on this machine is a 3P+S configured to look like an SIO-2 at ports 20/21. The problem is that the parallel ports are now at 22/23 and I can’t change them to be anything else without losing the SIO-2 compatibility.
So here is my question so I can use the parallel input on the 3P+S which is at port 23 and 24. Does anyone know the memory locations to bootstrap either 4K or 8K basic CLOAD commands. I know that deRamp has patched an SSM card’s parallel to port 6 to use CLOAD with basic, but I can’t do that so I need to modify/patch basic in memory itself to get mine working without adding another card to the system.
Anyone have MITS basic 4.0 patching information?
Thanks,
Corey
So here is my question so I can use the parallel input on the 3P+S which is at port 23 and 24. Does anyone know the memory locations to bootstrap either 4K or 8K basic CLOAD commands. I know that deRamp has patched an SSM card’s parallel to port 6 to use CLOAD with basic, but I can’t do that so I need to modify/patch basic in memory itself to get mine working without adding another card to the system.
Anyone have MITS basic 4.0 patching information?
Thanks,
Corey