HEDAKA HED-986 (DIP version)
Logs
chipChipset
cpuSockets
DIP40 PLCC68
speedFSB speeds
12.5MHz16MHz20MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
330mm x 218mm
chipCache
None/Integrated in the CPU
ramMax RAM size
2MB
ramRAM types
DIP-20 (4bit)DIP-16 (1bit)
pwrPSU connector
AT (6-pin P8 + 6-pin P9)
tag Also known as
connI/O ports
1x 
AT Keyboard
cardExpansion slots
5x 
16-bit ISA
3x 
8-bit ISA
wrench 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 Notes
  • Similar but slightly different than the PC Chips M205 and PCMATE TD60 motherboards. Examine area between the TD60 chip and the edge of the board
  • Has internal clock generator in the chipset running at fixed 12.5MHz and the connector for external clock is not connected to anything except on the 20Mhz board. J15 does nothing without the second ocillator.
  • Works with MRBIOS 1.65 Bios for Hedaka when arranged 32KB Even then 32KB Odd
  • Works with TD60 BIOS. PC Chips M205 is possibly organized differently.
  • The DIP-14 parity chips are only necessary if you enable parity in the BIOS
Last updated 2025-07-22T15:27:32Z
Board info score is 9.5/10
chip Chips
-> Chipset part
City Gate D60
cpufam CPU family support
bios 2 BIOS files available

vendor AMI - 1 entry

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
S286-6181-10159
Note
Arranged 32K Even then 32K Odd
Core version
2.2
BIOS version
Logs

vendor Mr. BIOS - 1 entry

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
HDK_210
Note
Arranged 32K Even then 32K Odd
Core version
1.65
BIOS version
Logs
drv 2 drivers available
Name
Version
OS support
Arch
Size
Filename
Name
Version
4.30
OS support
MS-DOS
Arch
Size
8.9KB
Filename
Name
Version
2.27
OS support
MS-DOS
Arch
Size
Empty
Filename
doc 2 board documents available
Release date
File
Logs
Release date
1990
File
Logs
Release date
File
Logs
image1 Image 1 of 13 (Microhouse)
image2 Image 2 of 13
image3 Image 3 of 13 (Maciej Przepiorka)
image4 Image 4 of 13 (anp-hsw)
image5 Image 5 of 13 (krivulak)
image6 Image 6 of 13 (Douglar)
image7 Image 7 of 13 (ThisOldTech)
image8 Image 8 of 13 (Maciej Przepiorka)
image9 Image 9 of 13 (anp-hsw)
image10 Image 10 of 13 (krivulak)
image11 Image 11 of 13 (Douglar)
image12 Image 12 of 13 (ThisOldTech)
image13 Image 13 of 13 (Douglar)

Disclaimer

The info found in this page might not be entirely correct. Check out this guide to learn how you can improve it.