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MaTel
September 2nd, 2008, 07:36 AM
Hello,

I own a IBM 62x0786 MFM Controller ( Xebec ). Unfortunately I have no manual for it. There is a Dip-Switch ( S1 ) with 4 Switches 1 - 4. How I have configure that controller for a ST-412 10MB harddisk? And how I can lowlevel format the harddisk on a IBM XT-5160?

regards
M. Volkmann

modem7
September 3rd, 2008, 12:36 AM
I own a IBM 62x0786 MFM Controller ( Xebec ). Unfortunately I have no manual for it. There is a Dip-Switch ( S1 ) with 4 Switches 1 - 4. How I have configure that controller for a ST-412 10MB harddisk?

Switches 1 & 2 configure drive 0 (C:)
Switches 3 & 4 configure drive 1 (D:)

0 0 = Type 13 (e.g. WD25)
0 1 = Type 2 (e.g. ST-225)
1 0 = Type 16
1 1 = Type 1 (e.g. ST-412)

Therefore, because you just have the one ST-412 drive, all you need to adjust is switches 1 and 2 - both set to ON.

Source: Upgrading & Repairing PC's (Mueller), 5th Edition, page 763



And how I can lowlevel format the harddisk on a IBM XT-5160?
I assume you're speaking of the forementioned IBM 62x0786 controller in an IBM XT-5160.
The standard G=C800:x method won't work on that card.

You can use the 'IBM Advanced Diagnostics Disk'.

You can use SpeedStor 6.03 - available from http://members.dodo.com.au/~slappanel555/software.htm
On running, choose 'ManualSetup' then 'Initialize' then 'StandardInit'.

In the following earlier thread, some other alternatives are discussed: http://www.vintage-computer.com/vcforum/showthread.php?t=10112

In case you are unaware, the drive needs to have warmed up before you low-level format. 10 minutes should be enough time.

MaTel
September 11th, 2008, 06:38 AM
Today I have used the SpeedStor-Tool. It works fine with my IBM-Controller and ST-412 harddisk.

Thanks!