Ardent Tool of Capitalism

The go-to place for all PS/2 and Micro Channel addicts. MAD Edition!
Reference
Material		 Software
& Drivers		 IBM
Systems		 Non-IBM
Systems		 MCA
Adapters		 Parts &
Technology		 Setup &
Config

7552 DASD

DASD Module P/N 00F5538

CR1 Run/Check LED
CR2 Drive 1 Check LED
CR3 Drive 2 Check LED
CR4 Drive 1 LED
CR5 Drive 2 LED
 J4,7 Molex power connector
J2,5 Drive connectors
J3,4 Drive connectors
J1 40-pin floppy header
U24 FDC controller

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).

Content created and/or provided by:
Louis F. Ohland, Peter H. Wendt, David L. Beem, William R. Walsh, Tatsuo Sunagawa, Tomáš Slavotínek, Jim Shorney, Tim N. Clarke, Kevin Bowling, and many others.

Ardent Tool of Capitalism - MAD Edition! is maintained by Tomáš Slavotínek.
Last update: 07 Dec 2023 - Changelog | Legal Info & Contact