>Amongst the things which I saved from the skip I have 4 >IBM 8" floppies,
>the labels say:
>
>MAP ENTRY DISKETTE **M.T.=5412**
>P/N=4410338 E.C.=571989 DIAGN.DISK. 1
>--------------------------------------------------------
>CONTENTS, 0D0-FFB-FFF-FD6-143-FC0,DD6,D44,
> FC2,DD9,C17-FA0,FA6,FA7
>--------------------------------------------------------
>
>
>
>STAND ALONE DISKETTE **M.T.=5412**
>P/N=4247991 E.C.=571931 DIAGN.DISK. 2
>--------------------------------------------------------
>CONTENTS, LDR-FC0,LD5-FA0,E0A
>
>--------------------------------------------------------
>
>
>3340 MICRO DIAGNOSTIC DISKETTE **M.T.=5412**
>P/N=4247992 E.C.=571989 DIAGN.DISK. 3
>
>--------------------------------------------------------
>CONTENTS, C16-FA1-FA2-FA3-FA4-FA5
>
>--------------------------------------------------------
>
>
>3340 DIAGNOSTIC DISKETTE **M.T.=5412**
>P/N=4247993 E.C.=571931 DIAGN.DISK. 4
>
>--------------------------------------------------------
>CONTENTS, C11,C12,C14,C15,C17-FA0,C18,C19,
> C1A,C1B,C1F
>--------------------------------------------------------
>
>Can anyone tell me what these are and what they were for?
>
>I realise that they were for diagnostics of some sort >and assume that the
>**M.T.=5412** is probably a machine >type, but I am not familiar with IBM's
>designation >numbers.
>
>At the bottom of the label is what I assume is a date in >the format
>77/01/05 - if my assumption is correct then >these must be 30 years old.
>
>--
>Regards
>Pete
Someting else intresting about those disks: The "CONTENTS" section is
actually a *directory*! Many IBM minis & mainframes that used FDD's did not
have an FAT on the disk! The result: you had to provide the track & sector
location on every disk access! a similar scheme was used in the prototypical
(and unreleased) Commodore 900 workstation.
____________________________________________________________
David Vohs, Digital Archaeologist & Computer Historian.
Computer Collection:
"Triumph": Commodore 64C, 1802, 1541, FSD-1, GeoRAM 512, Okimate 20.
"Leela": Macintosh 128 (Plus upgrade), Nova SCSI HDD, Imagewriter II.
"Delorean": TI-99/4A.
"Monolith": Apple Macintosh Portable.
"Spectrum": Tandy Color Computer 3.
"Boombox": Sharp PC-7000.
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Received on Fri Apr 28 2000 - 19:26:24 BST