Hi Marko, >The way I did it was that I piggy-backed another MMU on top of the >original one and added some glue logic that swapped some data pins on the >second MMU (I think D6 and D7) when the memory configuration registers >were addressed. The RAM bank selection signals (those that are connected >to -CAS on the RAM chips) from the new MMU were wired to RAM banks 2 and 3. Thanks, I have seen your schematics for going all the way to 1Mb. I assume then that there was never an official CBM way to make the expansion even though they design protected signal names? PLEASE TAKE NOTE: The contents of this email (including any attachments) may be privileged and confidential. Any unauthorised use of the contents is expressly prohibited. If you have received this email in error, please advise us immediately (you can contact us by telephone on +61 8 9441 2311 by reverse charge) and then permanently delete this email together with any attachments. We appreciate your co-operation. Whilst Orbital endeavours to take reasonable care to ensure that this email and any attachments are free from viruses or other defects, Orbital does not represent or warrant that such is explicitly the case (C) 2000: Orbital Engine Company (Australia) PTY LTD and its affiliates - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tml.hut.fi.
Archive generated by hypermail 2.1.1.