On Dec 11, 2011, at 12:40 PM, Segher Boessenkool wrote: >>>> Supposedly they also did an 852x that has only the low four ports (or >>>> the rest is not functional, anyway), i.e. the two parallel ports only; >>>> it was called something like 5210 (I forgot the exact name, and cannot >>>> find it anymore). >>> >>> 5710 if I remember right. >> >> The 5710 from the 128DCR (and 1571CR)? > > That's the one. Pretty obvious how they came up with that chip name, > heh :-) > >> That's more than a stripped-down >> 6526, as it also contains "an equivalent" (well, or so...) of the >> WD1770/1772 for MFM access. > > Ah, that makes a lot more sense, thanks for the info. This reminds me. Has anyone tested the 1571CR in a 128DCR with the ZoomFloppy? In particular, I'm wondering if the fast serial nibbling mode (nibread -s) works with that drive. This is important because this drive can't support the normal parallel port because that part of the 6526 was removed. But it should work with the 2 Mhz SRQ burst mode if that part of the chip wasn't limited during cost reduction. Let me know if you have any test results. -Nate Message was sent through the cbm-hackers mailing listReceived on 2011-12-11 22:01:44
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