OT: But for the vintage CPU guys: Intel 8008 clock

Ethan Dicks wrote: I did roughly as much when I built up my 6502 board. If memory serves, I had a GAL16V8AQ PLD (address decoder), 28C64 EEPROM, and a RAM chip on one chunk of breadboard, a W65C02A (WDC CMOS 6502) on another, and a TI 16C550 UART on the third. I don't think I got the breadboarded version stable at much more than 2MHz, but the Eurocard version runs quite nicely at 10MHz, with a full complement of I/O cards (CPU/RAM/ROM, UART, SP0256A-AL2 speech synthesizer). I've never plucked up the courage to put a scope on the backplane, though. Phi-0 and Phi-2 are probably rather messy, and I suspect SEL0 thru SEL3 aren't in much better shape... Schematics (hand drawn with a Rapidograph, no less!) are at http://www.philpem.me.uk/elec/6502/ if anyone wants to have a look. Ultimately, I got to the point where I could make it run EhBASIC and speak, then more or less ran out of things to do with it. At some point, I really should tie a MOS 6581 "SID" sound chip to the bus and see what happens... Or maybe a disk controller... -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/