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CL = function number (see #04019,#04020) DS,DX contain parameter(s): DL = byte parameter DX = word parameter DS:DX -> structure
Return:
As appropriate for function: AL = byte result AX = word ES:AX -> structure (and BX=ES) CX is often the error code (see #04021)
Notes: Several functions are covered in more detail in following entries. Most of these calls are also supported by Digital Research's DOS Plus v2.1; the unsupported functions are 26h,29h-2Bh,3Ah,3Dh-62h,71h-8Ch, 90h-92h,94h-97h,9Bh-ABh, and AEh-FFh
See Also: INT 21/AX=4459h - INT 21/AH=E0h"DOS Plus" - INT E6"CP/M-86"
(Table 04019) Values for CP/M-86,DR Multiuser DOS function number: 00h terminate calling process (see INT E0/CL=00h) 01h read a character (see INT E0/CL=01h) 02h write character to default console (see INT E0/CL=02h) 03h read character from default AUX (see INT E0/CL=03h) 04h write character to default AUX (see INT E0/CL=04h) 05h write character to default list device (see INT E0/CL=05h) 06h perform raw I/O on default console (see INT E0/CL=06h) 07h return default AUX input status (see INT E0/CL=07h) 08h return default AUX output status (see INT E0/CL=08h) 09h write string to default console (see INT E0/CL=09h) 0Ah read string from default console (see INT E0/CL=0Ah) 0Bh return default console input status (see INT E0/CL=0Bh) 0Ch get BDOS release ID (see INT E0/CL=0Ch) 0Dh reset all disk drives (see also INT 21/AH=0Dh) 0Eh set default drive (see also INT 21/AH=0Eh"DOS 1+") 0Fh open file via FCB (see also INT 21/AH=0Fh,#01345) 10h close file via FCB (see also INT 21/AH=10h) 11h search for first matching file with FCB (see also INT 21/AH=11h) 12h search for next matching file with FCB (see also INT 21/AH=12h) 13h delete file via FCB (see also INT 21/AH=13h) 14h sequential read via FCB (see also INT 21/AH=14h) 15h sequential write via FCB (see also INT 21/AH=15h) 16h create file via FCB (see also INT 21/AH=16h) 17h rename file via FCB (see also INT 21/AH=17h) 18h get bit map of logged drives 19h get default drive (see also INT 21/AH=19h) 1Ah set DMA address offset 1Bh get default disk allocation vector (see also INT 21/AH=1Bh) 1Ch set default drive to read-only 1Dh get bit map of read-only drives 1Eh set file attributes via FCB (see also INT 21/AX=4301h) 1Fh get address of disk parameter block (see also INT 21/AH=1Fh) 20h get/set default user number 21h read random record via FCB (see also INT 21/AH=21h) 22h write random record via FCB (see also INT 21/AH=22h) 23h compute file size with FCB (see also INT 21/AH=23h) 24h get FCB random record number (see also INT 21/AH=24h) 25h reset specified drives 26h access specified drives (not in DR DOS Plus v2.1) 27h free specified drives 28h write random with FCB, zero fill (see also INT 21/AH=28h) 2Ah lock records in FCB file (see also INT 21/AH=5Ch) 2Bh unlock records in FCB file (see also INT 21/AH=5Ch) 2Ch set BDOS multisector count 2Dh set BDOS error mode 2Eh get free space on disk 2Fh load, initialize, and jump to process ("chain process"). (see INT E0/CL=2Fh,INT 21/AH=4Bh) 30h flush write-deferred buffers 31h get/set system variable (DOS Plus v2.1) 32h call BIOS (XIOS) character routine (see #04020) 33h set DMA address segment 34h get DMA buffer address 35h CP/M-86 allocate maximum memory (see INT E0/CL=35h) 36h allocate maximum memory at specified segment (see INT E0/CL=36h) 37h CP/M-86 allocate memory segment (see INT E0/CL=37h,INT 21/AH=48h) 38h allocate memory at specified segment (see INT E0/CL=38h) 39h CP/M-86 free specified memory segment (see INT E0/CL=39h,INT 21/AH=49h) 3Ah CP/M-86 free all memory (not in DOS Plus v2.1) (see INT E0/CL=3Ah) 3Bh load .CMD file into memory (see INT E0/CL=3Bh) 3Ch (DOS Plus v2.1) call RSX program 40h (DR-NET, REAL/32) log on a server (see INT E0/CL=40h) 41h (DR-NET, REAL/32) log off a server (see INT E0/CL=41h) 42h (DR-NET) send a message 43h (DR-NET) receive a message 44h (DR-NET, REAL/32) get network status (see INT E0/CL=44h) 45h (DR-NET, REAL/32) get requestor config table (see INT E0/CL=45h) 46h (DR-NET) set compatibility attributes 47h (DR-NET, REAL/32) get server configuration table (see INT E0/CL=47h) 48h (DR-NET, REAL/32) set network error mode (see INT E0/CL=48h) 49h (DR-NET, REAL/32) attach network 4Ah (DR-NET, REAL/32) detach network 4Bh (DR-NET, REAL/32) set default password 4Ch (DR-NET, REAL/32) get-set long timeout 4Dh (DR-NET, REAL/32) get parameter table 4Fh (REAL/32) get extended network error 50h (DR-NET, REAL/32) get network information 53h get current time (see also INT 21/AH=2Ch) 54h set current time (see also INT 21/AH=2Dh) 55h get binary system date (see also INT 21/AH=2Ah) 56h set system date (see also INT 21/AH=2Bh"DATE") 57h allocate system flag 58h deallocate system flag 59h reserve memory in global area (see INT E0/CL=59h) 5Ah lock physical drive 5Bh unlock physical drive 5Ch search path for executable file (see INT E0/CL=5Ch) 5Dh load and execute command (see INT E0/CL=5Dh) 5Eh get/set process exit code (see INT E0/CL=5Eh) 5Fh set country information 60h get country information 63h truncate FCB file (see also INT 21/AH=28h) 64h create/update directory label 65h get directory label 66h get FCB date stamp and password mode 67h write extended FCB 68h set system date and time 69h get system date and time in binary 6Ah establish password for file access 6Bh get OS serial number (see INT E0/CL=6Bh) 6Ch (DOS Plus v2.1) get/set program return code 6Dh get/set console mode (see INT E0/CL=6Dh) 6Eh get/set string delimiter (see INT E0/CL=6Eh) 6Fh write block to default console (see INT E0/CL=6Fh) 70h write block to default list device (see INT E0/CL=70h) 71h execute DOS-compatible function (see INT E0/CL=71h) 74h set FCB time and date stamps 80h allocate memory (see INT E0/CL=80h) 82h deallocate memory (see INT E0/CL=81h) 83h poll I/O device 84h wait on system flag (see INT E0/CL=84h) 85h set system flag (see INT E0/CL=85h) 86h create message queue (see INT E0/CL=86h) 87h open message queue (see INT E0/CL=87h) 88h delete message queue (see INT E0/CL=88h) 89h read from message queue (see INT E0/CL=89h) 8Ah conditionally read from message queue (see INT E0/CL=8Ah) 8Bh write to message queue (see INT E0/CL=8Bh) 8Ch conditionally write to message queue (see INT E0/CL=8Ch) 8Dh delay calling process (see INT E0/CL=8Dh) 8Eh call process dispatcher (yield CPU) (see INT E0/CL=8Eh) 8Fh terminate calling process (same as func 00h) (see INT E0/CL=8Fh) 90h create a process (see INT E0/CL=90h) 91h set calling process' priority (see INT E0/CL=91h) 92h attach to default console (see INT E0/CL=92h) 93h detach from default console (see INT E0/CL=93h) 94h (REAL/32) set the process' default console (see INT E0/CL=94h) 95h assign default console to process (see INT E0/CL=95h) 96h interpret and execute commandline (see INT E0/CL=96h) 97h resident procedure library 98h parse ASCII string into FCB (see also INT 21/AH=29h) 99h return default console (see INT E0/CL=99h) 9Ah get address of system data (SYSDAT) (see INT E0/CL=9Ah) 9Bh get system time and date 9Ch return calling process' descriptor (see INT E0/CL=9Ch) 9Dh terminate process by name or PD address (see INT E0/CL=9Dh) 9Eh attach to default list device (see INT E0/CL=9Eh) 9Fh detach from default list device (see INT E0/CL=9Fh) A0h select default list device (see INT E0/CL=A0h) A1h conditionally attach to default list device (see INT E0/CL=A1h) A2h conditionally attach to default console (see INT E0/CL=A2h) A3h get OS version number (see INT E0/CL=A3h) A4h get default list device (see INT E0/CL=A4h) A5h attach to default AUX (see INT E0/CL=A5h) A6h detach from default AUX (see INT E0/CL=A6h) A7h conditionally attach to default AUX (see INT E0/CL=A7h) A8h set default AUX (see INT E0/CL=A8h) A9h return default AUX (see INT E0/CL=A9h) ACh read block from default AUX (see INT E0/CL=ACh) ADh (DOS Plus v2.1) write block to default AUX (see INT E0/CL=ADh) B0h configure default AUX (see INT E0/CL=B0h) B1h get/set device control parameters (see INT E0/CL=B1h) B2h send Break through default AUX (see INT E0/CL=B2h) B3h allocate physical memory (see INT E0/CL=B3h) B4h free physical memory (see INT E0/CL=B4h) B5h map physical memory (see INT E0/CL=B5h) B6h nondestructive conditional message queue read (see INT E0/CL=B6h) B7h timed wait on system flag (see INT E0/CL=B7h) B8h get/set I/O port mapping (see INT E0/CL=B8h) B9h set list device timeout (see INT E0/CL=B9h) BAh set AUX timeout value (see INT E0/CL=BAh) BBh execute XIOS service BDh (DR Multiuser DOS) delay (see INT E0/CL=BDh) FFh return 80386 to native mode
See Also: #04020 - #04021
(Table 04020) Values for DOS Plus v2.1 XIOS functions: 00h terminate program 01h ??? 02h check for console input status 03h read character from console 04h write character to console 05h write character to list device 06h write character to auxiliary device 07h read character from auxiliary device 0Fh get list device status 10h-14h reserved 15h device initialization 16h check console output status 17h-7Fh reserved ---BBC Acorn--- 80h get XIOS version 81h get Tube semaphore 82h release Tube semaphore 83h select text/graphics 84h update B&W graphics rectangle 85h update color graphics rectangle 86h get/release/update mouse 87h get system error info 88h entry in CLOCK called by WatchDog RSP 89h BBC OSBYTE function 8Ah BBC OSWORD function
See Also: #04019
(Table 04021) Values for DR Multiuser DOS Error Return Code: 00h no error 01h system call not implemented 02h illegal system call number 03h cannot find memory 04h illegal flag number 05h flag overrun 06h flag underrun 07h no unused Queue Descriptors 08h no free queue buffer 09h cannot find queue 0Ah queue in use 0Ch no free Process Descriptors 0Dh no queue access 0Eh empty queue 0Fh full queue 10h CLI queue missing 11h no 8087 in system 12h no unused Memory Descriptors 13h illegal console number 14h no Process Descriptor match 15h no console match 16h no CLI process 17h illegal disk number 18h illegal filename 19h illegal filetype 1Ah character not ready 1Bh illegal Memory Descriptor 1Ch bad return from BDOS load 1Dh bad return from BDOS read 1Eh bad return from BDOS open 1Fh null command 20h not owner of resource 21h no CSEG in load file 22h process Descriptor exists on Thread Root 23h could not terminate process 24h cannot attach to process 25h illegal list device number 26h illegal password 28h external termination occurred 29h fixup error upon load 2Ah flag set ignored 2Bh illegal auxilliary device number
See Also: #04019
Category: Other Operating Systems - Int E0h - C
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