Type 6381-MY0
Serial GZ5500AY3HR
Manufacturer IBM corp. United Kingdom Ltd.
Date March 1994

Physical description

Type Desktop (29 MAR 1994 print on top cover)
Dimensions (HxWxD) 128 x 360 x 464 mm
Weigth Approx. 8,1 Kg.
Drive bays 2 x 3.5" (1 internal), 1 x 5.25" half-height
Power supply 100W, 100-125/200-240 V, manual voltage switch (WK 38/94) REPLACEMENT

Main board

BIOS IBM (rev. L9ET40AIT), 21 Apr. 1994
Chipset SiS
Processor Intel 80486DX-33 MHz (32-bit), PGA
Coprocessor Integrated on 486DX
Memory 4 sockets for 70ns or 80ns 72-pin SIMMs
Std memory One 4 Mb SIMM
Max on system board 64 Mb (4 x 16 Mb)
External cache 0 Kb (exp. to 128 or 256 Kb), write-through, 15ns
Bus ISA 16-bit
Expansion slots 3 x 16-bit ISA (on riser card), all available
Interface IDE/ATA (2 units), FDD (2 units)
Video Integrated Tseng Labs ET4000-W32 super-VGA display adapter (chip 9413) w. 1 Mb of memory (orig. had 512 Kb) UPGRADE
Ports PS/2 keyboard, PS/2 mouse, 2 serial (UART 16550A), parallel, VGA


Installed RAM 4 x 4 Mb 70ns SIMMs (9453, 9370, 9510, 03-05-96) ADDITION
Audio Sound Blaster 16 Value (chip CT1745A, 18-94) w. CD-ROM interface ADDITION
Ethernet SMC 8216C (3395) ADDITION


Diskette drive 1.44 Mb, 3.5" slim (unk.)
Hard disk Western Digital WDAC-1210 (210 Mb), IDE/ATA, 3.5" slim (24 JAN 94) UPGRADE (*)
CD-ROM Matsushita-Panasonic CR-562-B, propr. interface (double-speed, DECEMBER 1993) ADDITION


Acquisition Sept. 99, paid a few $ together w. some other appliances
Condition Good, but not working
Installed O.S. None
Repairs/modifications Replaced power supply, added ethernet and audio cards, CD-ROM drive, all memory SIMMs
Current status All hw working
Current O.S. MS-DOS 6.22, MS Windows 3.1 (Italian)
Spare parts Drives, accessories


(*) According to submodel number (-MY0), this system unit originally had a 120 Mb HDD unit. Most other 486DX-33-based 6381 models have a 212 Mb HDD.


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This page was first published on the web on Nov. 11, 2001
Last revised May 24, 2004