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- David Gahris <dgahris@eece.maine.edu> provided the following information:
-
- > Are you sure about the hardware differences?
-
- Yes.
-
- * I have looked inside my 128DCR and inside stand-alone 1571s.
-
- * There is no 6526 or 8521 in the drive section of the 128DCR. I believe the
- 5710 handles fast serial because the 5710 is a Commodore custom chip and
- 128 fast serial is a Commodore custom protocol. [Ed's note: Commodore lists
- NTE229, ECG229, SK3246A/229, and 121-Z9021 as substitutes of the 5710.]
-
- * There is no 177x or heat-shrink-wrapped daughterboard in the drive section
- of the 128DCR. I believe the Motorola plastic quad flat-pack chip handles
- MFM because I am pretty sure that I have seen this chip in IBM PC drive
- mechanisms.
-
- * The 1571cr ROM works great in 1541 mode but not at all in 1571 mode in a
- standalone 1571.
-
- * Olaf Seibert informed me that the 1571cr ROM contains a string to the
- effect of "5710 (c) 1986 by c. hauck"
-