| 104,6 → 104,34 |
|---|
| unsigned short argoffset; |
| char cmdbuff[256]; |
| |
| /* special case: is this a drive change? (like "E:") */ |
| if ((cmdline[0] != 0) && (cmdline[1] == ':') && ((cmdline[2] == ' ') || (cmdline[2] == 0))) { |
| if (((cmdline[0] >= 'a') && (cmdline[0] <= 'z')) || ((cmdline[0] >= 'A') && (cmdline[0] <= 'Z'))) { |
| unsigned char drive = cmdline[0]; |
| unsigned char curdrive = 0; |
| if (drive >= 'a') { |
| drive -= 'a'; |
| } else { |
| drive -= 'A'; |
| } |
| _asm { |
| push ax |
| push dx |
| mov ah, 0x0e /* DOS 1+ - SELECT DEFAULT DRIVE */ |
| mov dl, drive /* DL = new default drive (00h = A:, 01h = B:, etc) */ |
| int 0x21 |
| mov ah, 0x19 /* DOS 1+ - GET CURRENT DRIVE */ |
| int 0x21 |
| mov curdrive, al /* cur drive (0=A, 1=B, etc) */ |
| pop dx |
| pop ax |
| } |
| if (curdrive != drive) puts(doserr(0x0f)); |
| return(-1); |
| } |
| } |
| |
| /* try matching an internal command */ |
| cmdptr = cmd_match(cmdline, &argoffset); |
| if (cmdptr == NULL) return(-2); /* command is not recognized as internal */ |
| |