>> When configured for games running in Ultimax mode, the /IO2 line is often >> found to be connected to the EXROM line. I can only decipher this to mean >So, I'd guess that such a configuration maps the external ROM at >$9f00-$9fff to $df00-$dfff in the I/O area. Ok, thanks Marko, but I assume the program is trying to do something like this, sta $DFFF (this activates /IO2 and in turn pulls EXROM low) jmp $8xxx (run code from ROM) The FastLoad Cart uses a capacitor ensure that the EXROM signal stays low for the 3us between the store and jump. Is this not necessary due to some "internal" or circuit delay? 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 Message was sent through the cbm-hackers mailing list
Archive generated by hypermail 2.1.1.