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| author | hpa <hpa> | 2001-01-21 00:21:51 +0000 |
|---|---|---|
| committer | hpa <hpa> | 2001-01-21 00:21:51 +0000 |
| commit | e9a9fa70273dd61b043555a3926ce82b9729416a (patch) | |
| tree | 7529d4087dff44872dac5b4ccffc9e108a96b7a2 | |
| parent | cf00b640236d57184a9b9d10eb78af60b365a595 (diff) | |
| download | syslinux-e9a9fa70273dd61b043555a3926ce82b9729416a.tar.gz syslinux-e9a9fa70273dd61b043555a3926ce82b9729416a.tar.xz syslinux-e9a9fa70273dd61b043555a3926ce82b9729416a.zip | |
Try to make the A20 delay loops a bit more consistent.
| -rw-r--r-- | ldlinux.asm | 6 | ||||
| -rw-r--r-- | pxelinux.asm | 6 |
2 files changed, 6 insertions, 6 deletions
diff --git a/ldlinux.asm b/ldlinux.asm index bfb483d1..84d47285 100644 --- a/ldlinux.asm +++ b/ldlinux.asm @@ -2535,7 +2535,7 @@ bcopy: push eax ; %define io_delay call _io_delay %define IO_DELAY_PORT 80h ; Invalid port (we hope!) -%define disable_wait 256 ; How long to wait for a disable +%define disable_wait 32 ; How long to wait for a disable %define A20_DUNNO 0 ; A20 type unknown %define A20_NONE 1 ; A20 always on? @@ -2669,11 +2669,11 @@ a20_test: push ax mov cx,0FFFFh ; HMA = segment 0FFFFh mov es,cx - mov cx,0100h ; Loop count + mov cx,32 ; Loop count mov ax,[ss:A20Test] .a20_wait: inc ax mov [ss:A20Test],ax -; call try_wbinvd + io_delay ; Serialize, and fix delay cmp ax,[es:A20Test+10h] loopz .a20_wait .a20_done: pop ax diff --git a/pxelinux.asm b/pxelinux.asm index 96143781..164e4727 100644 --- a/pxelinux.asm +++ b/pxelinux.asm @@ -2116,7 +2116,7 @@ bcopy: push eax ; %define io_delay call _io_delay %define IO_DELAY_PORT 80h ; Invalid port (we hope!) -%define disable_wait 256 ; How long to wait for a disable +%define disable_wait 32 ; How long to wait for a disable %define A20_DUNNO 0 ; A20 type unknown %define A20_NONE 1 ; A20 always on? @@ -2250,11 +2250,11 @@ a20_test: push ax mov cx,0FFFFh ; HMA = segment 0FFFFh mov es,cx - mov cx,0100h ; Loop count + mov cx,32 ; Loop count mov ax,[ss:A20Test] .a20_wait: inc ax mov [ss:A20Test],ax -; call try_wbinvd + io_delay ; Serialize, and fix delay cmp ax,[es:A20Test+10h] loopz .a20_wait .a20_done: pop ax |