DASD Module P/N 00F5538
CR1 Run/Check
CR2 Drive 1 Check
CR3 Drive 2 Check
CR4 Drive 1
CR5 Drive 2
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J4,7 Molex power conn
J2,5 Drive controller
J3,4 Drive Controller
J1 40 pin floppy header
U24 FDC Controller
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U24 I think there are two revisions
of FDC - The older one, used with the 720K floppy is P8272A, the newer
one, used with the 1.44MB floppies is the NEC D765AC. I have two DASD modules,
both boards appear identical, have identical P/Ns, but use different FDCs.
I have a 1.44MB floppy in one (with the 765 FDC). Uses the 8580 style floppy
with the big button below and to the right of the slot. ALPS DFL713A01A,
P/N 90X6766
Hard Drive in my toy is a WD-325M2, MFM for all I can tell.
The 7552 uses the same U channel drive rails that the 7568 does. The floppy
mount is the same (faceplate and rails).
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