| TRS-80 Model 4 from 1983 | |
| CPU: | Z80A @ 4MHz |
| RAM: | 128KB |
| Floppy Drives: | 2 half height DSDD |
| Display: | 12" amber CRT |
| Ports: | serial, Centronics parallel, cassette, system bus, external floppy |
| OS: | Level II BASIC in ROM, Montezuma Micro CP/M 2.2 |
| Catalog Price: | $1400 |
| Notes: | I purchased this system in 1984 from a 3rd party vendor, and it contains non-Tandy diskette drives. I also hated the flickering white screen, so I replaced the tube with a long persistence amber screen from Langley St. Clair. A problem arose during power off, when the shrinking spot on the display eventually burned the phospor at the center of the display. I ended up adding a second power switch to kill power to the monitor before shutting off power to the CPU. |
