Front view with IBM Color Photo Graphic VGA display
Rear panel (EMEA model)
Year of introduction: 1990
| Processor | 80286 10MHz Intel Processor |
| Bus Type | ISA Bus |
| Memory | 512 KB Memory – 2.5 MB Maximum |
| Floppy Drive | 3.5″ 1.44 MB Diskette Drive |
| HDD Controller | Modified RLL |
| Video Memory | 256 KB (256 KB Maximum) VGA |
| Expansion Slots | None |
| Bays | 2 |
| Power Supply | 65 Watt (In Monitor) |
| Parallel Ports | PS/2 Bidirectional |
| Modem | 2400 bps Hayes Compatible (US model) None (International models) |
| Serial Ports | None (US model) 19,200 baud RS-232C interface (International models) |
| Keyboard | 101 Key Selectric Touch Keyboard (US and Canada English models) 102 Key Selectric Touch Keyboard (International models) |
| Mouse | IBM Mouse (PS/2 style connection) |
| Operating System | IBM DOS R4.01 DOS Kernel and User Interface in ROM |
2011-C01 & M01 did not come with a Hard Drive
2011-C34 & M34 include a 30MB Modified RLL Hard Drive
2011-NEA included special educational software (Grade 2, Express Publisher & Linkway)
2011-U35 & T35 included ACIS software package (Windows 3.0, MS-Word)
The C01, C34, NEA and U35 came with a color VGA monitor. The M01, M34 and T35 came with a monochrome VGA monitor.
Planar
IBM PS/1 2011 planar
Components:
U1: Intel N822077AA, Floppy Disk Controller
U2: VLSI VL82C304-QC
U3: Intel P8042AH, universal peripheral interface 8-bit slave microcontroller
U6: VLSI VL16C451A-QC
U7: VLSI VL82C304-QC
U8: AMD N80L286-10/S, 80286 10MHz CPU
U9: VLSI VL82C300-PSFCP
U14: Samsung KM41C464J-10, 64Kx4 (32KB) Fast Page RAM (VGA)
U16: IBM 90X8941, VGA
U17: TI TMS44C256DJ-12, 256Kx4 (128KB) Fast Page RAM (system)
U18: 27C010-200 1M ROM (128KB), system ROM 256KB mapped at 0xF80000, odd bytes, ROM drive for non-US models
U19: ??? (anybody with a 2011 willing to remove the label that covers the chip?)
U21: Samsung KM41C464J-10, 64Kx4 (32KB) Fast Page RAM (VGA)
U22: TI TMS44C256DJ-12, 256Kx4 (128KB) Fast Page RAM (system)
U23: 27C010-200 1M ROM (128KB), system ROM 256KB mapped at 0xFC0000, even bytes, BIOS and ROM drive
U24: Samsung KM41C464J-10, 64Kx4 (32KB) Fast Page RAM (VGA)
U25: Samsung KM41C464J-10, 64Kx4 (32KB) Fast Page RAM (VGA)
U26: Samsung KM41C464J-10, 64Kx4 (32KB) Fast Page RAM (VGA)
U27: TI TMS44C256DJ-12, 256Kx4 (128KB) Fast Page RAM (system)
U28: 27C010-200 1M ROM (128KB), system ROM 256KB mapped at 0xFC0000, odd bytes, BIOS and ROM drive
U29: Samsung KM41C464J-10, 64Kx4 (32KB) Fast Page RAM (VGA)
U34: Samsung KM41C464J-10, 64Kx4 (32KB) Fast Page RAM (VGA)
U35: TI TMS44C256DJ-12, 256Kx4 (128KB) Fast Page RAM (system)
U36: 27C010-200 1M ROM (128KB), system ROM 256KB mapped at 0xF80000, even bytes, ROM drive for non-US models
U37: DALLAS DS1287, RTC
U38: Samsung KM41C464J-10, 64Kx4 (32KB) Fast Page RAM (VGA)
U39: inmos IMSG171P-35, color LUT
Y1: 24AKS012
Y2: 14AKS017
Y3: CK1100MC 48.00000MHz
Y4: 25.175MHz (VGA pixel clock)
Y5: 28.322MHz (VGA pixel clock)
Y6: TD308C/TD1100C 40.0MHz
J1: 34-pin Floppy drive connector (with power, don’t connect a standard floppy drive!)
J2: 20-pin Serial port connector
J5: RAM expansion port
J7: 34-pin connector for the PS/1 Audio/Joystick card option
J8: Adapter Card Unit (ACU) port
J9: DC-DC power converter card
J11: 44-pin HDD connector (XTA with power pins)
AMD N80L286-10/S CPU, Intel N82077AA floppy controller, and a couple VLSI support chips
IBM 90X8941 VGA, INMOS IMSG171P-35 color LUT, and 256KB of VRAM
512KB on-board RAM, 512KB system ROM, DALLAS DS1287 RTC (with bodge wires to an external battery)
512KB RAM expansion module .
PS/1 Audio/Joystick Card
Serial port
Technical Reference for PS/1 Computer (P/N 57F1970)
Almost every detail about the hardware can be found inside this book.
Complete book (532 pages), 1st edition 1990
searchable and indexed (there’s some mistake in the OCRred text, notably some 0 -zero- mistaken for O or C, 3 for B, etc, so consider this when searching for text)
Technical Reference for PS1 Computer – PN 57F1970.pdf
Single sections
Preface.pdf
TOC.pdf
Section 1. System Description.pdf
Section 2. System Board.pdf
Section 3. System Board IO Controllers.pdf
Section 4. Power Supply.pdf
Section 5. Keyboard.pdf
Section 6. Mouse.pdf
Section 7. Displays.pdf
Section 8. Drives.pdf
Section 9. Modem RS-232C Interface Cards.pdf
Section 10. 80286 Instruction Set.pdf
Section 11. Characters and Keystrokes.pdf
Section 12. Compatibility.pdf
Appendix. Options.pdf
BIOS error codes
| 101 | Interrupt failure |
| 102 | Timer failure |
| 103 | Timer interrupt failure |
| 104 | Protected mode failure |
| 105 | Last 8042 command not accepted |
| 107 | NMI error |
| 108 | Timer bus test |
| 109 | Protected mode test error |
| 111 | Memory parity error |
| 114 | Adapter card ROM CRC error |
| 161 | RTC power fail |
| 162 | Configuration error (run CONFIGUR) |
| 163 | Time & date not set (run CONFIGUR) / RTC error |
| 164 | Memory size error |
| 190 | System ROM CRC error |
| 201 | Memory test failed |
| 203 | Memory address error or refresh failure (Lines 16-23) |
| 301 | Keyboard error: key stuck or keyboard plugged into the mouse port |
| 303 | Keyboard or board controller error |
| 304 | Keyboard controller error |
| 305 | Keyboard +5v error (bad fuse?) |
| 601 | Floppy drive 0 error / not present |
| 603 | Floppy drive controller error |
| 1101 | Serial port internal error |
| 1180 | ??? |
| 1308 | Audio/joystick card error |
| 1701 | HDD controller error |
| 1790 | No HDD – Data cable off – Format not recognized |
| 2401 | Display error (with 1 long beep and 2 short beeps) |
| 8601 | System board error or mouse error |
| 8602 | Mouse error |
| 8603 | Mouse self-test error |
