Cloud CP/M

M80 Macro Assembler

Drive A : User 4 • by DJ Sures

Created 2026-05-03 • Updated 2026-05-03

Microsoft M80 macro assembler for writing optimized Z80 assembly code on CP/M with full macro support.

M80.COM program is located on the A: drive in user area 4. To run this, look in the Internet Adapter or Headless menu and select Cloud CPM. After CPM loads and you are presented with a A:0> prompt, type the drive (A:), and then type the user area (user 4). If you type DIR, look for the COM file (M80.COM). Enter that filename at the prompt to execute the M80 Macro Assembler.

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M80 Macro Assembler
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