L ast May my Vicky Twenty (Vic-20 clone) was progressing nicely. I claimed that all parts were new . At that point I had fitted a W65C02. A CMOS version of the 6502 which is still made today. The computer didn't work when I first switched it on, and it turns out that the W65C02 is not a drop-in replacement for the 6502 in a Vic-20*. A couple of connections are different, a pull-up resistor is required on one line, and most importantly, the logic levels on the Vic-20 board aren't high enough for the CMOS processor which requires a good strong high. The Byte Attic has worked on this problem and developed a circuit. He has been very open with this and it's now tried and tested. His board uses through-hole components, so it's large, needs sockets to raise it and then overhangs the Kernal ROM. I was proud of the looks of my Vicky Twenty and wished for something more discreet. I found that the transceiver was available in a surface-mount package and wondered whether the comp...