diff options
| author | hpa <hpa> | 2005-08-30 00:05:26 +0000 |
|---|---|---|
| committer | hpa <hpa> | 2005-08-30 00:05:26 +0000 |
| commit | deec9eeabdb560545f94198686b2f93ec6d20839 (patch) | |
| tree | 5ce2c5f0aeee40bdb5b5b2f620f24fb0dfa3f51e /parseconfig.inc | |
| parent | 33dfda973ac3e937afa23c948e62dd90ec3abd94 (diff) | |
| download | syslinux-deec9eeabdb560545f94198686b2f93ec6d20839.tar.gz | |
Correct the enabling of the 16550A FIFOsyslinux-3.11-pre10
Diffstat (limited to 'parseconfig.inc')
| -rw-r--r-- | parseconfig.inc | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/parseconfig.inc b/parseconfig.inc index 09712b9c..450af29a 100644 --- a/parseconfig.inc +++ b/parseconfig.inc @@ -214,29 +214,29 @@ pc_serial: call getint call slow_out mov al,03h ; Disable DLAB - add dx,byte 2 ; DX -> LCR + inc dx ; DX -> LCR + inc dx call slow_out in al,dx ; Read back LCR (detect missing hw) cmp al,03h ; If nothing here we'll read 00 or FF jne .serial_port_bad ; Assume serial port busted - sub dx,byte 2 ; DX -> IER + dec dx + dec dx ; DX -> IER xor al,al ; IRQ disable call slow_out - inc dx - inc dx ; DX -> FCR + inc dx ; DX -> FCR/IIR mov al,01h call slow_out ; Enable FIFOs if present - dec dx ; DX -> IIR in al,dx - inc dx ; DX -> FCR cmp al,0C0h ; FIFOs enabled and usable? jae .fifo_ok xor ax,ax ; Disable FIFO if unusable call slow_out .fifo_ok: + inc dx inc dx ; DX -> MCR in al,dx or al,[FlowOutput] ; Assert bits |