[Unknown] McPlus (286 HT Single Chip)
Chipset
Sockets 
FSB speeds 6MHz8MHz10MHz12.5MHz16MHz
Form factorBaby AT (max 220 x 330 mm)
Dimensions220mm x 220mm
Cache
None/Integrated in the CPU
Max RAM size
4MB
RAM type 30-pin SIMM
PSU connector
I/O ports1x
AT Keyboard
Expansion slots6x
16-bit ISA
1x
8-bit ISA
Known issues
- Leaky Ni-Cd clock battery
The Ni-Cd battery may be leaking, risking damage to PCB layers & nearby components. Promptly remove the battery & clean corrosion/alkaline salts from the board. Use white vinegar to dissolve salts, but exercise caution as vinegar can corrode exposed metals. A thorough examination & repair may be needed. Replace battery with guide: https://github.com/wiretap-retro/Not-A-Varta
Notes
JP8's purpose is the clock input to the NPU socket. 1-2 is to use OSC from Y2 as is. 2-3 is to enable the CKM divider on the NPU (so OSC / 3 on a 80287, OSC / 2 on an 80287XL). Removal of the jumper disables the NPU.
Last updated 2025-03-30T01:31:38Z
Board info score is 8.9/10
Chips
-> Chipset part
-> Human Interface
-> Real-Time Clock
3 BIOS files available
AMI - 3 entries
POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
20-0000-ZZ1573-00101111-031591-HT12
Note
Core version
03/15/91
BIOS version
Logs
1 driver available
Name
Version
OS support
Arch
Size
Filename
Name
Version
3.01
OS support
MS-DOS
Arch
Size
56.4KB
Filename
2 board documents available
Release date
File
Logs
Chip
Release date
File
Logs
Chip
Release date
1995-11-30
File
Logs
Chip
Release date
1995-11-22
File
Logs
Chip
Release date
1994-07
File
Logs
Chip
Release date
1996-01
File
Logs
Image 1 of 3 (Microhouse)
Image 2 of 3 (Malvineous)
Image 3 of 3 (computerguy096)
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