Thanks ! Figures it it being the odd one compared to the others, to bad we cannot find the manual.
Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun
It's used in a Furuno "FELCOM 12" GPS something system. Currently seeing if there's any useful info in the technical manual.
Well much time has passed and some interesting life events happened but I pulled this whole project back out to keep working on it.
Imagine my surprise as I discovered some pages describing my exact weird setup - only to realize it was me. I had this whole conversation here. And while I remember having it, I’d completely forgotten that we’d figured out the model name and found some docs.
Anyhow, I thought I’d pop in here… 900 days later… to say thank you to everyone who helped me earlier.
I DO have a new problem though - adding more RAM. I’ll start a new thread for that. I figured folks here would get a laugh out of my strange circular rediscovery .
• Never pay premium price for things people are throwing away. • Currently deciphering 80s Seagate HDDs to create replacement control electronics. • https://github.com/eparadis/HardDriveInfo • https://notruespaceman.com/ •
I've got the same SBC with mem-sockets filled.
It's like a Floppy drive.
You make a floppy image, cut it every 512k and burn it on AT29C040A (in my case).
First one goes to MEM1, second to MEM2, third to MEM3.
I found out while reading the flashs part by part and looking what's on them.
Jumpersettings on my board are: M2 A+B 2/3, C 1/2
M3 same. (AB 2+3 C 1+2)
Still not sure what the battery does as the RTC is a Benchmarq with integrated battery here.
LeFlash wrote on 2025-12-14, 15:20:I've got the same SBC with mem-sockets filled. It's like a Floppy drive. You make a floppy image, cut it every 512k and burn it […]
I've got the same SBC with mem-sockets filled.
It's like a Floppy drive.
You make a floppy image, cut it every 512k and burn it on AT29C040A (in my case).
First one goes to MEM1, second to MEM2, third to MEM3.
I found out while reading the flashs part by part and looking what's on them.
Jumpersettings on my board are: M2 A+B 2/3, C 1/2
M3 same. (AB 2+3 C 1+2)
Still not sure what the battery does as the RTC is a Benchmarq with integrated battery here.
OP mentioned an SRAM.
It seems safe to assume the battery is there to make the SRAM non-volatile when the power to the computer is turned off.
Right to repair is fundamental. You own it, you're allowed to fix it.
How To Ask Questions The Smart Way
Do not ask Why !
https://www.vogonswiki.com/index.php/Serial_port
