Cyrix 66MHz PC
A 486DX2-based PC from ca. 1994. It has HOT-409 2.2
mainboard wih Cyrix processor, 8MB of RAM and sound card with CD-ROM.
Contains quite high-end Trident VLB graphics board and Artisoft network
card I haven't managed to get working. Its hard disk is 540MB, WD
Caviar. Graphics board allows to get 800x600 with 16-bit color and
because it's VLB its speed is quite high comparing to typical Trident on
The computer runs with MS-DOS 6.22 and Windows 3.11. It theoretically can run Windows 95, but amount of RAM is relatively small for it.
|RAM||8MB (8x1MB, SIMM30)|
|Mainboard||Shuttle HOT-409 2.2 (TH99)
|Graphics||Trident TVGA9200CXr, 1MB, VLB, as bus master.|
|Sound||Labsound 503 (TH99) with game port and IDE controller. ES1688-based.|
|Ports I/O||Unknown, similar to Prime 2C MKIII (TH99), 16-bit ISA|
|Network||Artisoft, BNC, based on Artisoft ALICE chip, 16-bit ISA|
|System expansion bus||16-bit ISA
(2 VLB slots)
|Floppy/removable media drives||1x 3.5" 1.44MB floppy disk drive|
|Hard disks/ATA devices:||
WD Caviar 540MB, ATA.
Quad-speed CD-ROM drive.
Peripherals in collection:
|Casing||Standard small AT tower|
|Operating system(s):||MS-DOS 6.22 + Windows 3.11 For Workgroups|
The mainboard has 256kB of cache. In Setup, its timing can be set to the best one (0WS, 2-1-1-1) without problem if CPU is 66MHz. Graphics board - TVGA9200CXr - must be set to clock lower than 33MHz.
There are no other problems or caveats during installation
|ES1688 for Windows 3.x and 95 (if Win95 has no drivers)|
|TVGA9200CXr for DOS, Windows 3.x and 95 - DOS tools on 3.x disk.|
http://stephan.win31.de/hot409.htm - Shuttle HOT-409 page.
Unfortunately manual inaccessible.