I worked at a computer store in college and sold Kaypro Luggables that ran CP/M - the predecessor to DOS. The keboard would latch over the monitor for transport. They ran a single floppy that you'd boot it up with, then swap floppies to the program disk. 8-bit processors and no more than 64 kilobytes of memory. No hard drives as they were huge and a fortune. Winchester Hard drives, they were called back then as the model was to have 2 disks 30-30 MB!
We used to repair them at the chip- level using logic probes as DIP chips would be socketed. This was back in '85 and at the end of lifecycle. My personal first was a Ti 99/4a in late 70's. Then the Timex Sinclair.
We used to repair them at the chip- level using logic probes as DIP chips would be socketed. This was back in '85 and at the end of lifecycle. My personal first was a Ti 99/4a in late 70's. Then the Timex Sinclair.