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- Newsgroups: comp.os.linux
- Path: sparky!uunet!mcsun!Germany.EU.net!isaak.isa.de!newton.isa.de!schuster
- From: schuster@isa.de (Thilo Schuster)
- Subject: Re: Linux on a PS/2
- Message-ID: <1992Dec16.080943.23723@isa.de>
- Sender: usenet@isa.de
- Nntp-Posting-Host: newton
- Organization: ISA Gmbh, Stuttgart, FRG
- References: <RRUSK.92Dec10113516@rcx1.ssd.csd.harris.com> <Bz2D9w.Fru@constellation.ecn.uoknor.edu> <1992Dec11.164954.11705@novell.com>
- Date: Wed, 16 Dec 1992 08:09:43 GMT
- Lines: 53
-
-
- Hello Linux people,
-
- I've got a PS/2 Mod. 60 upgraded with a Kingston SX now 386 SX CPU
- replacement. Now I'am trying to get Linux working. I had a quick
- look at the kernel sources and I saw some things which are not
- fully compatible with the PS/2 architecture. There are actually
- two types of PS/2 Mod. 60: Type 8560-041 equiped with a MFM controller
- and 8560-071 comming with an ESDI controller (these are the
- configurations shiped in germany). I've got a 8560-041. One
- problem is to compile a kernel (well, I could compile it with
- a gcc under OS/2 which is capable to produce a.out format but
- there are some problems to replace the kernel on the a1 disk).
- The main architecture problems which I have found so far:
-
- 1. PS/2 use level triggered int's, not edge triggered ones. In
- my view are level triggered int's a nice feature because it
- allows interrupt sharing. But: Each device has to release it's
- int request, no auto end of interrupt mode is possible.
- 2. The devices (like the MFM controller) are not fully register
- compatible which requires some minor patches.
- 3. Some patches have to be done to the keyboard driver (Eh, by
- the way: Why does Linux switch bit 7 on port 0x61, as far as I
- know this has only to be done on XTs. Please correct me... ? )
- 4. PS/2 mouse (but this is fixed so far)
-
- All the information needed to get Linux running can be found in
- two books:
-
- IBM PS/2 Adapters and I/O Technical Reference (for the Mod 50 and 60)
- IBM PS/2 Technical Reference
-
- The main prob: I've got not very much time to do the changes. Perhaps
- after cristmas.
-
- And, by the way: It requires only a few byte patch with debug in
- llformat.com to get a non-IBM ESDI drive low level formatted. Ok,
- not ALL drives will work because of the transfer rate, but...
-
-
- greets,
-
-
- Thilo
-
-
-
-
-
- --
- Thilo Schuster, ISA GmbH
- E-Mail: schuster@isa.de
- UUCP: ...!{uunet!unido,pyramid}!isaak!schuster
-