Oops! I did ib [sic] again!

So many hobbies, so little time.

Like the video says, I just found a 36-year-old Heathkit Microprocessor Trainer for sale on eBay. Its major functions appear to work fine, but the Motorola MPU gets downright toasty. If memory serves, I noticed the same thing when I built one of these back in the early 1980s. Wish I still had it.

512 bytes of RAM. Yep, that’s right. Not GIGA, not MEGA, not even KILO. That’s — what? — 3-plus tweets?

Interaction is via the hexadecimal keyboard at bottom right. You enter each instruction and its operands one byte at a time. Correcting mistakes involves finding the defective entry, EXAMining its address, and CHANging to the correct byte value.

Built-in output is via the six seven-segment displays at top right. Unlike LCD displays, these are pretty limited in the characters they can display.

A lower-case “t”?

Nope, not happening.

PS: The audio is from my DotCom synthesizer, using the new Q119 sequential controller.