IBM PS/1 Model 2011

ps1_2011_unit

Front view with IBM Color Photo Graphic VGA display

Rear panel

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

ps1_2011_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)

ps1_2011_cpu

AMD N80L286-10/S CPU, Intel N82077AA floppy controller, and a couple VLSI support chips

IBM 90X8941 VGA, INMOS IMSG171P-35 color LUT, and 256K of VRAM

IBM 90X8941 VGA, INMOS IMSG171P-35 color LUT, and 256KB of VRAM

512K on-board RAM, 512K system ROM, and DALLAS DS1287 RTC (with bodge wires connected to a retrofitted external battery holder)

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

PS/1 Audio/Joystick Card

Serial port

Serial port

Technical Reference for PS/1 Computer (P/N 57F1970)

Almost every detail about the hardware can be found inside this book.

ps1_tech_ref

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
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