Control Program/Monitor - CP/M
![](https://loadzx.com/timexcomputerworld/wp-content/uploads/2023/03/disk-cpm-910x1024.jpg)
CP/M is a very basic disk operating system developed by Digital Research that predates Microsoft MS-DOS and was available for the Intel 8080 CPU with which the Zilog Z80 is fully compatible. Timex of Portugal paid 400.000$ (about 2000 Euros) for the license and by that time it was a lot of money.
Professional software would not be necessary to be recompiled so a lot of software would be readily available with very minor changes.
![](https://loadzx.com/timexcomputerworld/wp-content/uploads/2023/03/disk-cpm-emulator-878x1024.jpg)
Since the Timex FDD3000 can boot any OS, Timex wrote the BIOS for FDD3000, made the Terminal Emulator program so users can use CP/M with a normal Timex Computer/ZX Spectrum, and developed the Timex Terminal 3000 (TT3000) keyboard to use CP/M directly on the FDD3000. The Timex Computer 3256 would also be able to be used as a CP/M terminal keyboard just like TT3000.
![](https://loadzx.com/timexcomputerworld/wp-content/uploads/2023/03/cpm-monitor-boot-e1679087155197.gif)
![](https://loadzx.com/timexcomputerworld/wp-content/uploads/2023/03/cpm-booted-e1679087171178.gif)
Those screenshots show the Terminal Emulator program waiting for the CP/M to be booted on the FDD3000.