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- ; Micro Cornucopia Magazine Issue #45 Figure 3
- ; DEBUG session to alter floppy step rate
-
- C>debug
- -a ; invoke DEBUG's assembler
- ????:0100 xor ax,ax ; zero the AX register
- ????:0102 mov ds,ax ; DS = 0
- ????:0104 mov bx,522 ; offset of DPT
- ????:0107 mov byte ptr [bx],ef ; new step rate (ef = 4 msec) to DPT
- ????:010A int 13 ; reset FDC (AH still = 0 from above)
- ????:010C int 20 ; return to DOS
- ????:010E ; <cr> here exits assembler
- -nfaststep.com ; name file and set up FCB
- -rcx ; cx register gets file length
- CX 0000 ; current value of cx
- :e ; change to e, length of file
- -w ; write the file to disk
- Writing 000E bytes
- -q ; quit DEBUG