Anyone want to work together to find out the omni entertainment system's inner workings?

[ziqiangao]

Anyone want to work together to find out the omni entertainment system's inner workings?
Its hardware is listed here as not working and got inspired by Techmoan's video to reverse engineer it.
However, I don't have the physical hardware, so wonder anyone can help test stuff on it?

[stonedDiscord]

are you talking about hh_tms1k.cpp?
I don't see a dump for the OMNI there.
Nor do I see any code to handle 8-track tapes.
The video in question:
https://www.youtube.com/watch?v=zyOKgLtUxto

[ziqiangao]

No, just to reverse engineer the data format and maybe implement an emulator for it

…

On Sun, 3 Aug 2025, 15:34 stonedDiscord, ***@***.***> wrote: are you talking about hh_tms1k.cpp? I don't see a dump for the OMNI there. Nor do I see any code to handle 8-track tapes. The video in question: https://www.youtube.com/watch?v=zyOKgLtUxto — Reply to this email directly, view it on GitHub <#212 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AVBRBMYPWUKBS2Q6D3KL7I33LYMVXAVCNFSM6AAAAACC77BTP6VHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTGOJXG42TSMQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[happppp]

The two MCUs are not dumped yet. They're Rev E TMS1100, which means the only known method to dump the full contents is by decapping.
Here are PCB photos from Sean Riddle:

[ziqiangao]

Do you have any pictures of the keyboard and one of the 7 segment displays?

[ziqiangao]

what value are these

[happppp]

The big one: it is visible in the youtube video, 2200uf
The violet one: same one nearby, 1uf
The black one: ?

I don't have photos of the keypad or 7seg.

[ziqiangao]

Someone help me identify this chip?

[cuavas]

National Semiconductor LM382N low noise dual preamplifier, manufactured week 17 of 1981.

[ziqiangao]

I have this

https://github.com/ziqiangao/OnmiData/blob/master/OnBoardDecal.svg