15 Aug
2013
15 Aug
'13
10:22 a.m.
----- Original Message -----
From: "Al Kossow" <aek at bitsavers.org>
To: <cctalk at classiccmp.org>
Sent: Thursday, August 15, 2013 3:09 PM
Subject: Re: IBM 5440
On 8/15/13 3:26 AM, Nico de Jong wrote:
Well, when I look at the product specification, it is specified that ibm
5444 cartridges are used. The way I read the hardwaredocumentation, the
Philips machine takes the raw data, which could/should mean that no
logic/pre-handling is done in the drive. Of course I could be wrong.
I'll take a look at the p800 docs.
Camiel, should there be an IBM label besides the X12.. drives you have? Or
maybe something else indicating where the drive came from?
Nico
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Hi all
Would anyone know where I can find a IBM 5440 diskdrive, or even better :
a Philips 6875? They both use IBM 5444 cassettes, although with a
different number of segments per track
Nico
There were many, many companies that made OEM 5440-style disk drives, most
had slightly incompatible
interfaces or cabling from each other. Are you sure what you are looking
for are real IBM drives?
Looking at the X121x drive service manuals at
http://p800.wikispaces.com/Docs those drives are clearly European
designs at quite unlike IBMs (TTL logic and different head positioning
technology). The 2.5 vs 5 Mb difference
will be 200 vs 400 tracks.