Commodore Amiga A500 Technical Reference Manual page 163

J-FREEMEM equ
3
J-SET-PARAM equ
4
J-SET-SERVICE equ 5
J-STOP-SERVICE equ
6
J-CALLAMIGA equ 7
J-WAITAMIGA equ 8
J-CHECKAMIGA equ 9
Status Returns:
J-NO-SERVICE equ Offh
J-PENDING equ
0
J-FINISHED equ
1
J-0 K equ
0
J-NO-MEMORY equ
3
J-ILLFNCTN equ 4
;
no service available
;
after J-CALLAMIGA and
J-CHECKAMIGA
;
after J-CALLAMIGA and
J-CHECKAMIGA
;
general good return
;
requested memory not available
;
Illegal function code used in AH
Disk request structure for higher level Amiga file request from 8086:
AmigaDskReq STRUC
adr-Fnctn DW ? function code (see below)
adr-File DW
?
file number
adr-Offseth DW
?
byte offset into file high
adr-Offset
l
DW
?
byte offset into file low
adr-Counth DW
?
number of bytes t o transfer high
adr-Countl DW
?
number of bytes t o transfer low
adr-BufferAddr DW
?
offset into MEMF-BUFFER memory
for buffer
adr-Err DW
?
return code,
0
if all OK
AmigaDskReq ENDS
Function codes for AmigaDskReq adr-Fnctn word
ADRFNCTN-INIT EQU
0
currently not used
ADRFNCTN-READ EQU 1 given file, offset, count, buffer
ADRFNCTN-WRITE EQU 2 given file, offset, count, buffer
ADRFNCTN-SEEK EQU 3 given file, offset
ADRFNCTN-INFO EQU 4 currently not used
ADRFNCTN-OPEN-OLD EQU 5 given ASCllZ pathname in buffer
ADRFNCTN-OPEN-NEW EQU 6 given ASCllZ pathname in buffer
ADRFNCTN-CLOSE EQU 7 given file
ADRFNCTN-DELETE EQU 8 given ASCllZ pathname in buffer
Error codes for adr-Err, returned in low byte
ADRERROK EQU 0 no error
ADRERROFFSET EQU 1 not used
ADRERRCOUNT EQU 2 not used
ADRERRFILE EQU 3 file does not exist
ADRERRFNCT EQU 4 illegal function code
ADRERREOF EQU
5
offset past end of file
ADRERRMULPL EQU 6 not used
ADRERRFILELCOUNT EQU 7 too many open files