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Typo fix that caused the value 0x1234 to be written to a random memory

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location.  Also, instead of jumping ot the CPU's restart vector, just
call int 0x19 to reboot.  (Writing hte 0x1234 was a little useless
otherwise.)

PR:		bin/4901
Submitted by:	Jonathan Mini <mini@d198-232.uoregon.edu>
This commit is contained in:
Joerg Wunsch 1997-11-07 00:12:55 +00:00
parent 8518c081b4
commit 5e90d58311
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=31002
2 changed files with 21 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
usr.sbin/mkdosfs/bootcode.asm
View File

@ -11,7 +11,7 @@
;;; (This is written in as86 syntax. as86 is part of Bruce Evans'
;;; bcc package.)
;;;
;;; $Id$
;;; $Id: bootcode.asm,v 1.3 1997/02/22 16:06:36 peter Exp $
;;;
;;; This code must be linked to address 0x7c00 in order to function
;;; correctly (the BIOS boot address).
@ -66,9 +66,9 @@ lp2: xorb ah, ah ; int 0x16, fnc 0x00 -- wait for keystroke
int 0x16
mov ax, *0x40 ; write 0x1234 to address 0x472 --
push ax ; tell the BIOS that this is a warm boot
pop dx
pop ds
mov 0x72, *0x1234
jmpf 0xfff0,0xf000 ; jump to CPU initialization code
int 0x19 ; jump to CPU initialization code
message:
.byte 7
@ -99,4 +99,3 @@ message:
.byte 0x55, 0xaa ; yes, we are bootable (cheating :)
end

36
usr.sbin/mkdosfs/bootcode.h
View File

@ -12,31 +12,31 @@ static unsigned char bootcode[512] = {
0x09, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x46, 0x41, 0x54, 0x31, 0x32, 0x20,
0x20, 0x20, 0xbe, 0x65, 0x7c, 0x2e, 0x8a, 0x04, 0x46, 0x84, 0xc0, 0x74,
0x20, 0x20, 0xbe, 0x62, 0x7c, 0x2e, 0x8a, 0x04, 0x46, 0x84, 0xc0, 0x74,
0x08, 0xb3, 0x07, 0xb4, 0x0e, 0xcd, 0x10, 0xeb, 0xf0, 0x30, 0xe4, 0xcd,
0x16, 0xb8, 0x40, 0x00, 0x50, 0x5a, 0xc7, 0x06, 0x72, 0x00, 0x34, 0x12,
0xea, 0xf0, 0xff, 0x00, 0xf0, 0x07, 0xc9, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
0x16, 0xb8, 0x40, 0x00, 0x50, 0x1f, 0xc7, 0x06, 0x72, 0x00, 0x34, 0x12,
0xcd, 0x19, 0x07, 0xc9, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xbb, 0x0d, 0x0a, 0xba, 0x20, 0x20, 0x53,
0x6f, 0x72, 0x72, 0x79, 0x2c, 0x20, 0x74, 0x68, 0x69, 0x73, 0x20, 0x64,
0x69, 0x73, 0x63, 0x20, 0x64, 0x6f, 0x65, 0x73, 0x20, 0x61, 0x63, 0x74,
0x75, 0x61, 0x6c, 0x6c, 0x79, 0x20, 0x6e, 0x6f, 0x74, 0x20, 0x63, 0x6f,
0x6e, 0x74, 0x61, 0x69, 0x6e, 0x20, 0x20, 0xba, 0x0d, 0x0a, 0xba, 0x20,
0x20, 0x61, 0x20, 0x62, 0x6f, 0x6f, 0x74, 0x61, 0x62, 0x6c, 0x65, 0x20,
0x73, 0x79, 0x73, 0x74, 0x65, 0x6d, 0x2e, 0x20, 0x20, 0x20, 0x20, 0x20,
0xcd, 0xcd, 0xbb, 0x0d, 0x0a, 0xba, 0x20, 0x20, 0x53, 0x6f, 0x72, 0x72,
0x79, 0x2c, 0x20, 0x74, 0x68, 0x69, 0x73, 0x20, 0x64, 0x69, 0x73, 0x63,
0x20, 0x64, 0x6f, 0x65, 0x73, 0x20, 0x61, 0x63, 0x74, 0x75, 0x61, 0x6c,
0x6c, 0x79, 0x20, 0x6e, 0x6f, 0x74, 0x20, 0x63, 0x6f, 0x6e, 0x74, 0x61,
0x69, 0x6e, 0x20, 0x20, 0xba, 0x0d, 0x0a, 0xba, 0x20, 0x20, 0x61, 0x20,
0x62, 0x6f, 0x6f, 0x74, 0x61, 0x62, 0x6c, 0x65, 0x20, 0x73, 0x79, 0x73,
0x74, 0x65, 0x6d, 0x2e, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xba, 0x0d, 0x0a,
0xba, 0x20, 0x20, 0x50, 0x72, 0x65, 0x73, 0x73, 0x20, 0x61, 0x6e, 0x79,
0x20, 0x6b, 0x65, 0x79, 0x20, 0x74, 0x6f, 0x20, 0x72, 0x65, 0x62, 0x6f,
0x6f, 0x74, 0x2e, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xba,
0x0d, 0x0a, 0xc8, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xba, 0x0d, 0x0a, 0xba, 0x20, 0x20,
0x50, 0x72, 0x65, 0x73, 0x73, 0x20, 0x61, 0x6e, 0x79, 0x20, 0x6b, 0x65,
0x79, 0x20, 0x74, 0x6f, 0x20, 0x72, 0x65, 0x62, 0x6f, 0x6f, 0x74, 0x2e,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xba, 0x0d, 0x0a, 0xc8,
0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd,
0xcd, 0xbc, 0x0d, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xbc, 0x0d,
0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@ -49,6 +49,6 @@ static unsigned char bootcode[512] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55, 0xaa, };
0x00, 0x00, 0x00, 0x55, 0xaa, 0x00, 0x00, 0x00, };
#endif /* BOOTCODE_H */