Hello, > Yes, I have posted it here: Thanks! >> No! The ipc code ends in a endlees jump loop. The 8088 do it when >> the dram bus is give up. The only way out of this loop is an irq. So >> i think the 6509 triggers the 8088 over an interrupt. > > Where do you see this endless loop? Please look at Ruud's disassembly. > IPC is handled by the "rqster" procedure, I don't see any endless loop > there. It just sends the IRQ request to 6509, sends parameter bytes, > then receives the answer bytes and returns. Or when the ipc command byte has a highest bit set, there is a loop at > rqstlp: > jmp short rqstlp Greetings Martin Message was sent through the cbm-hackers mailing listReceived on 2011-01-25 22:00:13
Archive generated by hypermail 2.2.0.