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AX = D102h BL = first character of the interpreter command BH = last character of the interpreter command (or blank) DS:SI -> parameter for the interpreter command as ASCIZ string DS:DI -> MDEBUG data structure (see #03078)
Return:
AL = FFh CF set on error AH = error number (see #03077) DS:SI -> ASCIZ error message (max 30 characters) if AH=0Ch CF clear if successful AH = return code 00h continue processing the command line 01h leave MDEBUG popup session 02h leave MDEBUG popup session and automatically popup again if the InDOS flag is zero 03h not used (same as 00h) 04h not used (same as 00h) 05h put new command line into the input buffer, DS:SI -> new command line (ASCIZ string, max 66 chars) 06h process new command line DS:SI -> new command line (ASCIZ string, max 66 chars) else unknown status, but continue processing commmand line
Note: This function must end with a far call to the old INT 2F handler (with registers unchanged) if the driver does not support the interpreter command in BX. Otherwise, the driver must not chain to the old INT 2F.
(Table 03077) Values for MDEBUG error number: 01h syntax error 02h first shell of the command.com is activ 03h Esc pressed 04h break pressed 05h DOS is busy 06h command ended 07h division by zero 08h invalid display driver 09h invalid command driver 0Ah error 8 and 9 0Bh unknown error 0Ch new error else unknown error
Format of MDEBUG data structure: Offset Size Description (Table 03078) 00h WORD register SE 02h WORD register OF 04h WORD register FS 06h WORD register FO 08h WORD register AX 0Ah WORD register BX 0Ch WORD register CX 0Eh WORD register DX 10h WORD register SI 12h WORD register DI 14h WORD register DS 16h WORD register ES 18h WORD register BP 1Ah WORD register SS 1Ch WORD register SP 1Eh WORD register FL (flags) 20h WORD register R0 22h WORD register R1 24h WORD register R2 26h WORD register R3 28h WORD register R4 2Ah WORD register R5 2Ch WORD register R6 2Eh WORD register R7 30h WORD register R8 32h WORD register CS, return-address 34h WORD register IP, return-address 36h DWORD saved pointer to data for key
(v1.60) saved monitor address (v1.70) 3Ah 12 WORDs saved register values on last popup entry (for key) (original register values at popup entry of MDEBUG) AX, BX, CX, DX, SI, DI, DS, ES, BP, SS, SP, flags 52h 12 WORDs saved register values on last popup exit (for key) AX, BX, CX, DX, SI, DI, DS, ES, BP, SS, SP, flags 6Ah DWORD address of the DOS-invars-table 6Eh DWORD address of the InDOS flag 72h WORD offset of the register which is used for the segment of the first monitor window 74h WORD offset of the register which is used for the offset of the first monitor window 76h WORD name of the register which is used for the segment of the first monitor segment 78h WORD name of the register which is used for the offset of the first monitor window 7Ah WORD pseudo register 1 7Ch WORD pseudo register 2
Category: Debuggers/Debugging Tools - Int 2Fh - M
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