Hello! Today I noticed something strange with the KERNAL /CS line of the C64. Normally this line should go low only when KERNAL is accessed. But I am seeing very short low pulses (about 50ns) at the beginning of many clock cycles. These pulses mess up with my Flash handling circuit so I need to get rid of them. I thought of a simple RC filter for this purpose, but my first question is why they occur at all? Is that some artifact which happens when the VIC handles the bus back to the CPU? There is no such phenomenon on respective CS lines of BASIC and CHAROM. Regards, Michau. Message was sent through the cbm-hackers mailing listReceived on 2013-05-26 20:03:45
Archive generated by hypermail 2.2.0.