Still waiting for the 6850 UART, and the crystal for it, and I'm not sure where I've put my 74HCT100's? - I'm also sure I've got some right angles 0.1 header socket strips as well (for the FTDI board to plug in), but those are also proving elusive
Quick edit, I found my 74HCT100's - I checked where I'd ordered them from, and it was Farnell not RS, so they were in different packaging. The 28C256 from Aliexpress seems fine, I've programmed it with two different 16K files, which you can select with the jumpers, and it verifies fine. I got the T48 EPROM/EEPROM programmer from Aliexpress as well, I've never had one before