> If this construction works or not, the fact that they used a 6510 in this > way > completely suprised me. I wonder how you feel. > [COPLIN, Nicholas.] Its very interesting indeed. I've often wondered how an external device could write to the C64's RAM.... I figured reading is easy enough as you just latch on the edge of the Phi2, but putting data on the bus and writing it has always confused me... if you pull DMA low and monitor the BA you can work out when to put data on the bus during Phi2, but how does one delay the Write=low signal? The circuit still seems to use the internal R/W line... is there a wait to avoid it... ---------------------------------------------------------------- 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 cooperation. 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 are free from computer viruses or other defects. (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.tcm.hut.fi.
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