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Thread: DOS: cold boot / warm boot

  1. #1

    Default DOS: cold boot / warm boot

    One should actually think that the key combination CTRL+ALT+DEL triggers a warm start. On all my DOS computers it's so; it always was, but ... However, I have an IBM PC 5150 motherboard where this is not the case. The key combination always triggers a cold start! Also a mini program created with DEBUG, which should trigger a warm boot, creates only a cold start. Does anyone have an idea why?

  2. #2

    Default

    Quote Originally Posted by haglebu View Post
    Also a mini program created with DEBUG, which should trigger a warm boot, creates only a cold start. Does anyone have an idea why?
    I use this one:


    goto begin

    e 40:72 34 12
    rcs
    ffff
    rip
    0000
    g

    :begin
    debug<c:\reboot.bat


    See what that does.

    I also have a 16 byte com file (reboot.com) that does the same thing if you'd like to try that one.
    PM me if you're looking for 3" or 5" floppy disks. EMail For everything else, Take Another Step

  3. #3

    Default

    I tested your batch file. But it also only triggers a cold start. It would also have surprised me, because your DEBUG instructions correspond to mine. The following code is from Scott Mueller (URP, 2nd Ed., p. 828):
    Code:
    DEBUG
    -N WARMBOOT.COM
    -A 100
    MOV AX,0040
    MOV DS,AX
    MOV WORD PTR [0072],1234
    JMP FFFF:0
    
    -R CX
    10
    -W
    -Q
    I use WARMBOOT.COM on all my PC's and it works otherwise perfectly.

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