see imbedded comments below, please.
Dick
-----Original Message-----
From: Arfon Gryffydd <arfonrg_at_texas.net>
To: Discussion re-collecting of classic computers
<classiccmp_at_u.washington.edu>
Date: Friday, April 09, 1999 7:59 AM
Subject: Floppy and Hard disc questions....
>I have just gotten an old GRiDCase 1530 running and now I need to rig some
>things.
>
>First the harddisc:
>
>1) The manual says that it uses an IBM AT compatible harddisc. What's the
>difference between an IBM AT style harddisc and an IDE? Is there anyway to
>rig an adapter?
The PC/AT disk drive used the ST-506 interface (20-conductor data cable,
34-conductor control cable) and what was essentially a WD-1002 WAH
controller. The IDE interface is, from a software perspective, essentially
the same interface as what was used with the WD controller card. The
controller hardware has simply been migrated to the drive. Now, EIDE is
another bird. It has enhancements which make it less compatible with that
old firmware. It's advisable you try your Grid machine with an old disk
drive first before you fiddle with the drive adapter hardware.
>2) There's a floppy expansion plug on the back but I do not know the
>signals needed for a generic floppy. Is there a web page with the pinouts,
>signal directions and a signal description?
>
What you have to find out is what the pinout of that particular connector
is. There are lots of sources for standard FDD interface cable pinout.
>
>Thanks,
>
>Arfon
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Received on Fri Apr 09 1999 - 10:29:14 BST