IBM PS2 Model 30 Technical Reference (January 1987)
The IBM Personal System/2 Model 30 Technical Reference is IBM's 348-page technical reference for the 8086 PS/2 Model 30 (8530), part number 80X0661 (cover), First Edition, January 1987. Like the Model 25 book it is a single volume covering the system board, power supply, keyboard, BIOS and instruction set. The preface lists the Model 30 Guide to Operations as a prerequisite and the Hardware Maintenance Service and Hardware Maintenance Reference manuals as related publications.
Contents
[edit | edit source]From the contents pages:
- Section 1, System Board (p. 1-1): the 8086 and its system support and I/O support gate arrays, DMA, interrupts and interrupt sharing, memory and ROM, the I/O channel with connectors, signals and timings (p. 1-23), the video subsystem (p. 1-36), the diskette drive interface, serial port, parallel port (p. 1-123), beeper (p. 1-127), connectors (p. 1-128) and specifications (p. 1-130).
- Section 2, Coprocessor (p. 2-1): the 8087.
- Section 3, Power Supply (p. 3-1): description, input and output power, overvoltage and overcurrent protection, power good signal and connectors.
- Section 4, Keyboard (p. 4-1): the 101/102-key keyboards.
- Section 5, System BIOS (p. 5-1): interrupt listing including interrupt 1AH, system and real-time clock services (p. 5-64), BIOS data areas, the fixed disk parameter table (p. 5-73) and model byte (p. 5-76).
- Section 6, Instruction Set (p. 6-1), Section 7, Characters and Keystrokes, glossary, bibliography and index.
What this manual does not contain
[edit | edit source]There are no FRU part numbers, removal procedures, symptom-to-FRU index, schematics or component values. Third-party logic drawings of the same board are at IBM PS2 Model 30 Schematics.
What it settles
[edit | edit source]The supply is a single-phase 70 W unit with four output levels, internal to the system unit, handling 120 V or 220/240 V input through an internal fuse; it shuts down on DC overcurrent or undervoltage until the condition is corrected. It provides 9.0 A at +5 V, 1.8 A at +12 V, 110 mA at −5 V and 300 mA at −12 V. The system board and storage take about 5 A of +5 V, leaving about 4 A for adapters, and all four levels are bussed across the three expansion slots (p. 3-3).
| Output | Load current | Regulation | Ripple | Minimum |
|---|---|---|---|---|
| +5 V | 1.5-9.0 A | +5 % / −4 % | 50 mV p-p | +4.5 V |
| −5 V | 0.0-0.11 A | +10 % / −8 % | 100 mV p-p | −4.3 V |
| +12 V | 0.0-1.8 A | +5 % / −4 % | 80 mV p-p | +10.8 V |
| −12 V | 0.0-0.30 A | +10 % / −9 % | 250 mV p-p | −10.2 V |
AC input is 90-137 V at 2.0 A maximum (110 V nominal) or 180-265 V at 1.0 A (220 V nominal) (Figure 3-1). Power Good is TTL-compatible, active at 2.4-5.25 V and inactive at 0.0-0.4 V, with a turn-on delay of 100-500 ms (p. 3-5). The supply connects to the system board through two 6-pin connectors, P3 and P4 (p. 3-6).
The −5 V output distinguishes the Model 30, like the Model 25, from the Micro Channel PS/2 models, whose technical references list only +5, +12 and −12 V.
Pages that cite this document
[edit | edit source]- IBM PS/2 Model 30, IBM PS/2 Model 30 Maintenance Guide, IBM PS/2 Model 30 Troubleshooting Guide and IBM PS/2 Model 30 Capacitor Replacement Guide cite it for the supply ratings, sense levels and system board details.
- IBM PS/2 Model 25 Troubleshooting Guide compares its sense levels with the Model 25's.
- IBM PS2 Model 25 Technical Reference (June 1987), IBM PS2 Model 30 286 Guide to Operations, IBM PS2 Model 30 286 Hardware Maintenance Reference and IBM PS2 Model 30 Schematics list it as related.