diff options
| author | hpa <hpa> | 2001-02-07 21:11:53 +0000 |
|---|---|---|
| committer | hpa <hpa> | 2001-02-07 21:11:53 +0000 |
| commit | 3f8124c63cfcbb9022e4aeab0840b26625e216b7 (patch) | |
| tree | d91c98ba51e98ae11ed4681d42dfd5101f74a1e8 /pxelinux.asm | |
| parent | ebec67004782a5a6bb3ed497cd851de5ff958e9b (diff) | |
| download | syslinux-3f8124c63cfcbb9022e4aeab0840b26625e216b7.tar.gz | |
Don't rely on SS -> zero_seg, since that will NOT be true in general forsyslinux-1.52-pre1
PXELINUX.
Diffstat (limited to 'pxelinux.asm')
| -rw-r--r-- | pxelinux.asm | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/pxelinux.asm b/pxelinux.asm index e6765ac7..ae5bacf4 100644 --- a/pxelinux.asm +++ b/pxelinux.asm @@ -2133,7 +2133,7 @@ _io_delay: out IO_DELAY_PORT,al enable_a20: pushad - mov byte [ss:A20Tries],255 ; Times to try to make this work + mov byte [cs:A20Tries],255 ; Times to try to make this work try_enable_a20: ; @@ -2144,16 +2144,16 @@ try_enable_a20: ; ; If the A20 type is known, jump straight to type ; - mov bp,[ss:A20Type] + mov bp,[cs:A20Type] add bp,bp ; Convert to word offset - jmp word [bp+A20List] ; Implicit ss: because of bp + jmp word [cs:bp+A20List] ; ; First, see if we are on a system with no A20 gate ; a20_dunno: a20_none: - mov byte [ss:A20Type], A20_NONE + mov byte [cs:A20Type], A20_NONE call a20_test jnz a20_done @@ -2161,7 +2161,7 @@ a20_none: ; Next, try the BIOS (INT 15h AX=2401h) ; a20_bios: - mov byte [ss:A20Type], A20_BIOS + mov byte [cs:A20Type], A20_BIOS mov ax,2401h pushf ; Some BIOSes muck with IF int 15h @@ -2178,7 +2178,7 @@ a20_kbc: call empty_8042 jnz a20_done ; A20 live, no need to use KBC - mov byte [ss:A20Type], A20_KBC ; Starting KBC command sequence + mov byte [cs:A20Type], A20_KBC ; Starting KBC command sequence mov al,0D1h ; Command write out 064h, al @@ -2206,7 +2206,7 @@ a20_kbc: ; Running out of options here. Final attempt: enable the "fast A20 gate" ; a20_fast: - mov byte [ss:A20Type], A20_FAST ; Haven't used the KBC yet + mov byte [cs:A20Type], A20_FAST ; Haven't used the KBC yet in al, 092h or al,02h and al,~01h ; Don't accidentally reset the machine! @@ -2227,7 +2227,7 @@ a20_fast: ; - dec byte [ss:A20Tries] + dec byte [cs:A20Tries] jnz try_enable_a20 mov si, err_a20 @@ -2250,9 +2250,9 @@ a20_test: mov cx,0FFFFh ; HMA = segment 0FFFFh mov es,cx mov cx,32 ; Loop count - mov ax,[ss:A20Test] + mov ax,[cs:A20Test] .a20_wait: inc ax - mov [ss:A20Test],ax + mov [cs:A20Test],ax io_delay ; Serialize, and fix delay cmp ax,[es:A20Test+10h] loopz .a20_wait @@ -2268,9 +2268,9 @@ disable_a20: ; ; call try_wbinvd - mov bp,[ss:A20Type] + mov bp,[cs:A20Type] add bp,bp ; Convert to word offset - jmp word [bp+A20DList] ; Implicit ss: because of bp + jmp word [cs:bp+A20DList] a20d_bios: mov ax,2400h |