On 10/21/22 19:44, Stephen A Edwards via vcf-midatlantic wrote:
These appear to be Nabu network PCs ( https://en.wikipedia.org/wiki/NABU_Network) that were, indeed, meant to be intelligent set-top boxes and had little to no firmware or mass storage since their software was meant to come over the cable network.
Inside, they're little Z80 systems that might actually be able to run CP/M, but the home versions (of which these almost certainly are) didn't have the disk interface that would enable this
If there is (or can be) RAM at address 0, CP/M is certainly a possibility.
At the very least, some of the bigger chips (possibly the TMS9918 GPU and AY-3-8910) may be socketed and thus easy to recover.
Heck, just those two ICs are worth the purchase price. -Dave -- Dave McGuire, AK4HZ New Kensington, PA