On 03/07/2012 10:10 AM, Gábor Lénárt wrote: > For C64 as far as I can guess, an unrolled LDA/STA sequence can cause > something like 7 cycles (for LDA/STA), so on 1MHz it should be > around 140kbyte/sec. Maybe the double with C128 in 2MHz mode (can run CIAs > in C128 with 2MHz clock?). The CIAs in a C128 are 1MHz models and as far as I understand it, even if the CPU runs at 2MHz, the CIAs still run at 1MHz and the CPU clock is 'stretched' to a 1MHz cycle if a CIA (and SID?) access is detected. So running the C128 at 2MHz will make the copy loop faster, but not quite twice as fast. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2012-03-07 18:00:24
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