First post, by dekkit
Updated - with links to mapped out Information (last updated 22/04/2023)
This turned into quite a project that began around April 2022. While this has been quite a learning curve, I intended to update this first post in case anyone finds this via google and would like to know more information about this SBC and turn it back into a usable 486 system.
KEY SECTIONS - Index
VIDEO - VGA Socket
Link to VIDEO DRIVERS
KEYBOARD - PS/2 Keyboard socket
HDD IDE sockets (CF Card Adapter)
CF Card Recommendations
SERIAL PORTS socket + RESET Button pins
PS/2 MOUSE to SERIAL MOUSE - DIY using Ardunino Nano
PARALLEL PORT Socket
FLOPPY DRIVE Socket
CMOS BATTERY - DIY Adapter (3v coin holder)
PC104 Socket and link to PC104 to ISA - DIY Adapter
PC104 Network Card Add on
BIOS - Original Video (32KB)
BIOS - Original System BIOS (128KB)
BIOS - Modified System BIOS for CRT mode (128KB)
Using a 12v PSU - ATX Breakout board and PICO PSU
Near Finished - Perspex Case + Plastic Stand-offs + Power Buttons
...and lastly
VIDEO DRIVERS & BIOS BACKUP PACKAGE
Background - Original Post
A few months ago I acquired the following neatly sized 486dx2-80 and SBC motherboard off a local market place advert but unfortunately couldn't find much user information at all on it online.
I have slowly been going through studying the ICs - ie reading through 'Chips' datasheets for pin outs and application examples, then using a multi-meter to trace key chip pins . Also comparing it to other service docs for SBC, 486 chips, socket 3 mainboards of similar era etc to help speed the process.
While its been fun journey mapping out something made 27 years ago for an eventual dos mini rig, I'm keen to see if anyone else has see one before and/ or have any docs in their inventory that could help verify?
Single Board Computer (SBC) - 486-DX2-80 - Innovative Technologies, Houston, Texas - 1995
It also came with PC104 socket and a custom PC104 network card + IDC socket (which looks to map through a few sockets into a single interface)
On the back of the pcb, it has the following markings
(C) 1995
Innovative technologies
Houston, Texas
it / 486
REV C
SN: C-004-xxx-1-0
I found someone asking the same question here (with no real answer either) dated Oct 5, 2016 (https://forums.overclockers.com.au/threads/wh … -board.1206509/)
If no one has any documentation that can help, i'll continue to map out the ports from the datasheets and post my progress and results here (hopefully i can still continue to edit the first post)
dekkit