Impression 786 ACIO VESA MOTHERBOARD
Chipset
Sockets 
FSB speeds 25MHz33MHz40MHz50MHz
Form factorBaby AT (max 220 x 330 mm)
Dimensions254mm x 218mm
Cache
64KB128KB256KB
Max RAM size
32MB
RAM type 30-pin SIMM
PSU connector
Multi CPU supportno
Also known as
- Impression 786 AIO
- ATRONICS INTERNATIONAL MASTER REV.A
- ATRONICS INTERNATIONAL ATI-MASTER REV.A
- Unknown 604031A
- P&Q 612-
I/O ports1x
AT Keyboard
Expansion slots7x
16-bit ISA
2x
32-bit VLB
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
this is a later version of the MASTER REV.B
Last updated 2025-04-10T10:26:18Z
Board info score is 9.1/10
Chips
-
Chipset part
1 BIOS file available
AMI - 2 entries
POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
40-1200-001805-00101111-060692-USA-9204
Note
Core version
060692
BIOS version
Logs
POST string
40-1200-00156-00101111-060692-USA-9204-H
Note
Core version
060692
BIOS version
Logs
No drivers available
1 board document available
Release date
File
Logs
Chip
Release date
File
Logs
Family
Release date
File
Logs
Image 1 of 4 (Microhouse)
Image 2 of 4 (InfiniXDerg)
Image 3 of 4 (crazytiti)
Image 4 of 4 (InfiniXDerg)
Disclaimer
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