Hi All, I have noticed something I cannot understand when I tried to reverse engineer the schematic for a couple of CBM cartridges. The cartridges have jumpers which are either soldered or not depending which memory config is needed. 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 that access to $DF00 will map in the ROM to $8000. But what holds it there?? Would it not disappear without a capacitor or something to hold the EXROM line low? - Nick 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
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