On 2013-06-18, at 19:21, Nicolas Welte wrote: > The same PCB was also used in the 1570 and 1571 versions of DD3, and even in the C128DCR version. The DCR drive has no free I/O lines at all, and the 1570/71 has only free lines on the CIA chip. To avoid having a different PCB for each 1541 version, and also for each 1570/1571/C128D/C128DCR version, they used the approach with the 6821 PIA. Do you know why they tapped on the A1-A4? Is there something peculiar in any of those other drives that would require this? -- SD! Message was sent through the cbm-hackers mailing listReceived on 2013-07-07 19:02:04
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