| 0,0 → 1,66 |
|---|
| /* |
| * break |
| */ |
| |
| static int cmd_break(struct cmd_funcparam *p) { |
| unsigned char brkflag = 0; |
| |
| if (cmd_ishlp(p)) { |
| outputnl("Sets or clears extended CTRL+C checking"); |
| outputnl(""); |
| outputnl("BREAK [ON | OFF]"); |
| outputnl(""); |
| outputnl("Type BREAK without a parameter to display the current BREAK setting."); |
| return(-1); |
| } |
| |
| /* no params: display current break state */ |
| if (p->argc == 0) { |
| _asm { |
| push ax |
| push dx |
| |
| mov ax, 0x3300 /* query break-check flag */ |
| int 0x21 /* status (0=OFF, 1=ON) in DL */ |
| mov [brkflag], dl |
| |
| pop dx |
| pop ax |
| } |
| if (brkflag == 0) { |
| outputnl("BREAK is off"); |
| } else { |
| outputnl("BREAK is on"); |
| } |
| return(-1); |
| } |
| |
| /* too many params? */ |
| if (p->argc > 1) { |
| outputnl("Too many parameters"); |
| return(-1); |
| } |
| |
| /* exactly 1 parameter - "on" or "off" */ |
| if (imatch(p->argv[0], "on")) { |
| brkflag = 1; |
| } else if (!imatch(p->argv[0], "off")) { |
| outputnl("Invalid parameter"); |
| return(-1); |
| } |
| |
| /* set break accordingly to brkflag */ |
| _asm { |
| push ax |
| push dx |
| |
| mov ax, 0x3301 /* set break-check level */ |
| mov dl, [brkflag] /* 0=OFF 1=ON */ |
| int 0x21 |
| |
| pop dx |
| pop ax |
| } |
| |
| return(-1); |
| } |