First post, by Kubik
Folks, I have purchased relatively cheap Tandon 7488, that was sold as non-functional. First, it was obvious it won't work as it had no memory which was clearly visible on eBay picture - that's why I decided to buy it, hoping it might be relatively easy to fix. However, after the thing arrived, it turned out it misses more than just RAM. The CPU is missing as well 😀
Now for the fun part - what CPU is actually supposed to go there? 😀
The mainboard consist of two boards, in fact. The bottom board has PLCC-68 socket that looks like being meant for numeric coprocessor. The upper, smaller board (with a number of PALs) has traditional PGA-168 socket, which suggests 486.
There are some oscillators missing on the board as well, including one empty DIL-14 socket. That makes me nervous as well...
Before experimenting with this stuff: is there any Tandon owner who could shed a bit more light on this strange beast?