Hello Ruud, It must be that I write in Australian and not English :) >A core-emulator just emulates the 6502, not the C64, yes? Yes, a core emulator only emulates the CPU and memory, but none of the I/O which is handled by the real CBM hardware. The CPU core I have used emulates the 6510 so that it also supports the undocumented commands (which the 65816 doesn't, but it has 16bit modes etc) >Here I am confused as well. Talking about mirroring regarding the >SCPU your cor-emulator emulates a SCPU? These are the mirror specs for my core emulator as an example of the gains which can be made if you limit the amount of memory which has to be mirrored.... the gains are very significant, but actual values will be different on a SCPU because of the following. All writes on the SCPU take at least 1us. The writes to the CIA's take 3us as there are additional wait-states used to prevent reads until...... (i forget, something regarding pull-up response) - 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 - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail firstname.lastname@example.org.
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