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- Newsgroups: comp.sys.ibm.ps2.hardware
- Subject: Need to know about ROM holes in PS/2 Model 90 XP 486
- Message-ID: <1992Sep4.032058.4827@massey.ac.nz>
- From: L.Chisholm@massey.ac.nz (Len Chisholm)
- Date: Fri, 4 Sep 92 03:20:58 GMT
- Organization: Massey University, Palmerston North, New Zealand
- Keywords: PS/2 486 ROM UMB BIOS
- Summary: I want to know the unused areas in the PS/2 Model 90 XP 486 ROM
- X-Reader: NETNEWS/PC Version 2c
- Lines: 19
-
- We have a number of IBM PS/2 Model 90 XP 486 computers , and they have an
- astounding 128k of ROM BIOS etc. I understand that there is software about
- which 'knows' the areas of the ROM it is safe to map RAM over for UMBs
- in DOS5 to get network drivers out of low DOS memory ( I believe there is
- a protected mode BIOS which is not used by normal DOS which can be mapped ).
-
- The ROM starts at E000:0 with 91F7224 and is dated 10/01/90.
-
- If anybody can tell me which are the unused regions I will be very grateful.
-
- Thanks in anticipation
-
- --
- -------------------------------------------------------------------------
- | LEN CHISHOLM , Systems programmer | EMail: L.Chisholm@massey.ac.nz |
- | Department of Production Technology | Phone: +64 6 3505262 |
- | Massey University | FAX: +64 6 3505604 |
- | Palmerston North, New Zealand | |
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