IBM PS2 Model P70 HITR Supplement
The IBM PS/2 Model P70 Supplement for the Hardware Interface and BIOS Interface Technical References, dated 20 March 1990, part number 15F2150, form number S15F-2150-00. 110 pages — the largest of the three supplements hosted here.
What it contains
IBM's instructions are shorter than for the other two models:
- Use the Personal System/2 Model P70 Technical Reference with the Hardware Interface Technical Reference.
- Use the PS/2 Model P70 BIOS Supplement, at the back of the package, with the BIOS Interface Technical Reference.
The bulk of the package is the Model P70 technical reference pages — the same material as the bound April 1989 edition — plus a BIOS supplement specific to the P70, which the Model 55 and 65 SX packages do not have in the same form.
What it does not contain
No text layer — an image-only scan.
This is a loose-leaf update package, not a book. It has no contents page, no index and no standalone narrative: the first pages are IBM's filing instructions, followed by hard-tab separator sheets that say "Insert the hard tab labeled ... here, then discard this page", followed by the replacement pages themselves. Read it knowing that structure, or the first few pages look like a scanning error.
It contains no FRU numbers, no removal procedures, no component values and no schematics.
Download it here: IBM PS2 Model P70 HITR Supplement.pdf