Hugo Holden
Veteran Member
I picked up a very interesting Yang single board computer on ebay in a lovely briefcase complete with power supplies, with a unique S-100 32k static memory card which has a backup battery on board. I'm going to try that in my SOL-20. (If I outbid anyone on this forum I apologize)
See attached photos. Fortunately it came with the manuals for both the computer and card. It was made in Laurel MD, around 1983/4.
Clearly it was an educational tool for the Z80, but also it acts as a ROM emulator to assist software development. It has parallel and serial ports as well as a cassette tape interface and a monitor ROM programmed by Yang and on board RAM. I'm still studying it.
Does anyone know about "YES" Yang Electronic Systems, Inc ? It looks to me that a lot of effort went into it and the design of the memory board looks really well thought out.
See attached photos. Fortunately it came with the manuals for both the computer and card. It was made in Laurel MD, around 1983/4.
Clearly it was an educational tool for the Z80, but also it acts as a ROM emulator to assist software development. It has parallel and serial ports as well as a cassette tape interface and a monitor ROM programmed by Yang and on board RAM. I'm still studying it.
Does anyone know about "YES" Yang Electronic Systems, Inc ? It looks to me that a lot of effort went into it and the design of the memory board looks really well thought out.
