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| author | rnordier <rnordier@FreeBSD.org> | 1999-02-26 14:51:14 +0000 |
|---|---|---|
| committer | rnordier <rnordier@FreeBSD.org> | 1999-02-26 14:51:14 +0000 |
| commit | c17b4c476c5727a6c2b93447d3ea72b73468846a (patch) | |
| tree | 740f3760b92f885353814b0584c01eedb90b5827 /sys/boot/i386/boot0 | |
| parent | 910c87343a87703c9bfa36c0136ea1509d009b5a (diff) | |
| download | FreeBSD-src-c17b4c476c5727a6c2b93447d3ea72b73468846a.zip FreeBSD-src-c17b4c476c5727a6c2b93447d3ea72b73468846a.tar.gz | |
Implement "setdrv" option
Diffstat (limited to 'sys/boot/i386/boot0')
| -rw-r--r-- | sys/boot/i386/boot0/boot0.s | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/sys/boot/i386/boot0/boot0.s b/sys/boot/i386/boot0/boot0.s index 08a8d6b..fcbd155 100644 --- a/sys/boot/i386/boot0/boot0.s +++ b/sys/boot/i386/boot0/boot0.s @@ -13,7 +13,7 @@ # purpose. # -# $Id: boot0.s,v 1.5 1998/11/29 14:09:00 rnordier Exp $ +# $Id: boot0.s,v 1.6 1998/12/05 11:58:33 rnordier Exp $ # A 512-byte boot manager. @@ -33,8 +33,9 @@ .set KEY_ENTER,0x1c # Enter key scan code .set KEY_F1,0x3b # F1 key scan code - .set _NXTDRV,-0x47 # Drive number - .set _OPT,-0x46 # Default option + .set _NXTDRV,-0x48 # Next drive + .set _OPT,-0x47 # Default option + .set _SETDRV,-0x46 # Drive to force .set _FLAGS,-0x45 # Flags .set _TICKS,-0x44 # Timeout ticks .set _FAKE,0x10 # Fake partition entry @@ -60,7 +61,10 @@ start: cld # String ops inc incb1(-0xe,_di_) # Sector number jmpnwi(main-LOAD+ORIGIN) # To relocated code -main: movbr1(_dl,_FAKE,_bp_) # Save drive number +main: tstbi1(0x20,_FLAGS,_bp_) # Set drive? + jz main.0 # No + movb1r(_SETDRV,_bp_,_dl) # Drive to force +main.0: movbr1(_dl,_FAKE,_bp_) # Save drive number callwi(putn) # To new line movwir(partbl,_bx) # Partition table xorl %edx,%edx # Item @@ -240,11 +244,12 @@ os_linux: .ascii "Linu"; .byte 'x'|0x80 os_freebsd: .ascii "Free" os_bsd: .ascii "BS"; .byte 'D'|0x80 - .org PRT_OFF-0xb,0x90 + .org PRT_OFF-0xc,0x90 drive: .ascii "Drive " nxtdrv: .byte 0x0 # Next drive number opt: .byte 0x0 # Option +setdrv: .byte 0x80 # Drive to force flags: .byte FLAGS # Flags ticks: .word TICKS # Delay |
