Lab-Volt (348?) cpu trainer

I noticed in a post from 2007 that 'Ren' had one of the afore mentioned trainers. I was wondering if he or anyone can answer three and a half quick questions?
1) Is the cpu a 6502? (nmos or cmos)(it's missing)

2) What was the supply voltage (I may yet work this out from the regulator circuit but it would be nice to know for sure)

3) There may be a chip missing beside and between the reset and halt/step switches. The is an empty socket between the 74ls14 Schmitt and the 74s04 inverter.

Hoping like crazy that no-one has played musical chairs with the chips. They're all socketed.

Thanks in advance
peter walker

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