Finally got round to a quick test of the PAL-1 serial i/f (here in its ttl form) ... sadly a simple loopback test fails, and worse, I won't have time to look at it again in detail until Monday. #pal1 #mc6850 #fail #retrocompting

Lookie here ... the PAL-1 Serial Interface Adapter boards have arrived at last. These can be built with either a DB9 RS-232 or 5v TTL connector.
#pal1 #mos6502 #mc6850 #retrocomputer

Managed to eliminate some of the vias, so a little happier now. #pal1 #mc6850 #retrocomputing

Finished routing the PAL-1 Serial Interface Adapter. More vias than a swiss cheese ... well, more than I'd like anyway.
Can be built with either an RS232 DB9 connector or a TTL header.
#pal1 #mc6850 #mos6502 #retrocomputing

Hello from PAL-1! Made some progress with the serial interface today. 300 to 38400 baud with hardware flow-control. #pal1 #mc6850