- Activate Cassette/Disk module.
- Key in 01 (Format Disk).
- The display will ask 'Disk Number to Format'.
- Enter a number from 0 to 3.
- Press ENTER.
Source: SP-12 — e-mu-sp-12-user-guide (manual)
Symptoms this guide addresses
Source: SP-12 — e-mu-sp-12-user-guide (manual)