On 08/14/2011 11:15 PM, Wolfgang Moser wrote: > > Anders, as far as I remember sometime in the past you told that the well > known dumper programs from William, Olaf and Marko are not able to dump > the RRIOT ROM and probably the DOS ROMs too from your DOS-1 equipped > floppy. Did you ever find out what cases this inability? I am willing to > try to fix my dumper to get this job done as long as we can find out > that there is a way that will work in the end. After reading the datasheet for the 6530 I am wondering if no one ever has built a small circuit to hook up to the user port of a C64 and dump the ROM of a 6530 that way. The circuit could be relatively simple, using a MC14040 (12bit binary counter) as the counter for the address lines plus maybe some glue logic to adjust polarity of the reset signal for the counter and control of the chip selects for the 6530. The data lines of the 6530 would be connected to PB0-PB7 on the user port and the clock input for the counter to PA2. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2011-08-15 13:00:18
Archive generated by hypermail 2.2.0.