Digital Research CP/M

Boots the Digital Research CCP to the CP/M 2.2 A> prompt. Type CP/M commands directly: DIR lists the disk, TEST and 8080PRE run the bundled 8080 CPU diagnostics. Add ?debug, or open the debugger, to single-step the 8080, set breakpoints and inspect memory. Click the screen first so it captures the keyboard.

Boots the Amstrad PCW to the CP/M A> prompt. Type CP/M commands directly: DIR lists the disk, HELLO greets you, TEST and 8080PRE run the bundled CPU diagnostics. Open the debugger to single-step the Z80, read and write registers, set breakpoints and inspect memory. Click the screen first so it captures the keyboard; on mobile use the on-screen keyboard.