| Name | Size | Description |
| 550doc.zip | 7555 | Fast Serial Ports (Technical Note by Michael Spalter) |
| 640xtmod.zip | 2565 | Put 640K on an IBM 256K motherboard |
| allsea.zip | 141082 | All Seagate hard drive + controller specs (good) |
| cardg20.zip | 283645 | Informational Utility for I/O Card Jumper Setup, K.Noble |
| cdromsum.zip | 11132 | Nice intro to CD technology; CD summary |
| copro16a.zip | 82656 | Huge amount of info on math coprocessors for PCs, N. Juffa |
| cpucmp14.zip | 13044 | Performance comparison 386DX, 38600DX, 486DLC, RapidCAD |
| faxg3.zip | 4831 | FAX Group III definition (CCITT) |
| harddisk.zip | 9476 | List of hard disk data (9 Apr 1990) (great) |
| ibmerrs.zip | 2277 | Listing of 'IBM' diagnostic error codes (+ meaning) |
| pcdiag.zip | 3079 | Listing of IBM PC diagnostic error codes |
| pins.zip | 2253 | Text shows RS232C + parallel pins layout |
| theref43.zip | 191742 | Drive and controller technical guide, R.Falbo (impressive) |
| vgadoc4b.zip | 578476 | (S)VGA programming info+test utility, w/TP, F.Thoegersen |
| vintro.zip | 33631 | Intro + tutorial to NEC V20/30 - c/g req'd |