home *** CD-ROM | disk | FTP | other *** search
- TITLE TurboDOS formater for M-Drive/H
- ; Assemble with M80 or compatible assembler.
- .Z80
-
- ; This program formats a 2 Megabyte M-Drive/H to all E5Hs. It is optimized
- ; primarily for speed since the whole thing is easily less than 1 allocation
- ; block long anyway.
-
- ; 09/11/87 Rev 0 Bob Clyne Initial coding.
-
- ; M-Drive ports. Set for whatever ports you are using.
-
- HBASE EQU 040H
- HDATA EQU HBASE ;M-drive data port.
- HADDR EQU HBASE+1 ;M-drive address port.
-
- ASEG
-
- ORG 100H
-
- START: XOR A ;Zero the accumulator.
- OUT (HADDR),A ;Send to M-drive address port to tell drive
- OUT (HADDR),A ;to start at address 0.
- OUT (HADDR),A
- LD B,A ;Set B to 0.
- LD C,HDATA ;Set C to M-drive data port.
- LD E,250 ;Setup E as loop counter.
- LD HL,BUFFER ;Point to buffer.
- FMTLP: ;Format loop.
- REPT 16 ;Each of the following 2 instructions formats
-
- OTIR ;256 bytes, by repeating them 16 times we
- OTDR ;format 8K each time through the loop.
-
- ENDM
-
- DEC E ;Decrement the loop counter.
- JR NZ,FMTLP ;Loop if not done.
- JP 0 ;Reset system if done.
-
- ; Buffer contains the format bytes.
-
- BUFFER:
- REPT 258
-
- DB 0E5H ;Value to format to.
-
- ENDM
-
- END