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This must be disassembled! Every PCB must be photographed in high resolution and all ROMs must be dumped. For science and preservation!

Hello! Thanks for interest! Emulator. So far It somehow boots from bubble memory, but with visual artifacts. Probably because I have wrong CCOS version for my 1101 emulator. Fixed some bugs related to RTC and timing emulations, But... I stalled emulator development. Need to finish GPiB...

Without dedicated software, it is not possible.

Can anybody help with small reverse engineering on Compass/Compass II main board? Can you beep connections on main board from following ICs? For Compass 1101: 1) U25 Intel 7220 bubble memory controller. Where goes/is connected pin 7 !DACK 2) U25 Intel 7220 bubble memory controller. Where goes/is...

@tschak909 you are welcome to improve and fix problems. Remember that both me and @usernameak don't have any physical GRiD Computer (No compass series and no GRiDcase series). We know one youtuber who own broken physical Compass 1139. From time to time wee bombard him and ask for small reaserch...

As far as I know @usernameak is researching 1139 ROM dump and trying to figure out how works 512x256 screen stuff. Can you show command line arguments for MAME when compiling gridcomp? Is it possible to get 1129 ROM dump from alternative source (best source: take ROM ICs out from 1129 and...

Still no files. It is really weird that 10 MB image is compressed to 46 kb ZIP file. After unzipping and examine image with hex editor I see that whole hard disk contains UUU characters. Something wrong with ZIP? Can you try 7zip compression on image and or share/upload on external web page...

Emulator is still in early development stage. Bubble and GPIB not working yet (top priority). 1101 ROM dump is running. Getting message: "Cannot boot: Storage medium error" Video subsystem for 320x240 is working. 512x256 not tested yet. I need some help on hardware research. Like beeping some...

Sounds interesting. I am working on GRiD Compass emulator. We can share knowledge.

Can you make high resolution pictures for 1107? Both external and internal (motherboard)? Can you dump ROMs for 1107?

According to attached .PDF, there was 9 GRiD compass models. Newer hear about 1103 and 1107 models. Do you have more information about these 2 models?

The same famous HDD310.img Yesteday i tried to extract files, but GRiDISKCOM_Qt5_GUI crashing when opening partition1. I already contancted author. I promised, that will check and fix problem.

Looks like there are something related to BASIC on 10 MB HDD image. I can extract it later.