IBM PS/2 Model 85 T2

Chipset parts: IBM 10G4672 (I/O controller) IBM 10G7808 (DMA Controller) IBM 69G1212 IBM 69G1204

Description
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Release date:  1993-09-20      [see all boards with this chipset]

Overview

This chipset is found on the Model 85 type 2 motherboard. It operates at 33MHz. Two of the chip's function is unknown.

10G4672 I/O controller

No datasheet exists for this chip. It is found in many later PS/2s. It includes the following functions:

  • Micro Channel interface for internal peripherals (incl. POS)
  • Interrupt controller
  • Timers
  • Keyboard and mouse controller
  • Real time clock (RTC) and CMOS logic control (external)
  • 2x Serial interface
  • 1x Parallel interface
  • 82077 floppy disk controller (FDC) support (external)
  • EEPROM controller (external)

Further Info: https://www.ardent-tool.com/tech/ASIC_Info.html#10G4672

10G7808 DMA Controller

No datasheet exists for this chip. It is only found in the model 85.

69G1212

No datasheet exists for this chip. It is only found in the model 85 type 2 motherboard.

69G1204

No datasheet exists for this chip. It is only found in the model 85 type 2 motherboard.

Drivers: not available
Documentation: not available
Other files: not available