i have newly bought a lambda pc 8300 computer but unfortunately when i put the power jack of 12 V to the computer socket the red light turns on and a beep sound heard but only black display there is no cursor. i compared the motherboard i have with some pc 8300 motherboards on the net and realised that there are four 2114 ram chip slots on the board but there is none of them. i want to know if there should be those chips on the board to have it work properly.
Looking at this http://www.museo8bits.com/lambda.htm it looks like either there is 4 small chip OR 1 big.
Unfortunately these are custom made chips. And this version is custom made for the Lambda 8300.
I was hoping in the future to create a ULA clone for the ZX81 in a CPLD, and when that is working, maybe modify it to work on the Lambda 8300. The custom ULA in the Lambda 8300 includes a ROM with the characters as well (and not like the ZX81, where the characters are stored in the BASIC ROM).