First, a big thanks to Pilot20 for first [post=760083]posting[/post] about this firmware.

This is an official 1633S firmware, BS41, that supports 4x +R DL and 12x -R (features that were previously available only for the 1653S).

Edit: Forgot to mention that BS41 also features improvements to bitsetting. The drive can now remember the booktype setting after reboots. See posts #22 and #24 for more details.

Official download: http://www.liteonamericas.com/us/download.htm

OP-friendly version: http://codeguys.rpc1.org/firmwares.html

Oddly enough, as you can see from OPâ€™s report below, none of the +R9 media codes seem to be set to 4x, although a few -R codes have been upgraded to 12x.

```
OmniPatcher Media Code Report
=============================
OmniPatcher version: 1.3.17-devel
Firmware file name: Bs41win.exe
--------------------------------------------------------------------------------
General Information
--------------------------------------------------------------------------------
Drive type: SOHW-1633S
Vendor string: LITE-ON
Product string: DVDRW SOHW-1633S
Firmware revision: BS41
Firmware timestamp: 2004/10/29 18:28
--------------------------------------------------------------------------------
+R Media Codes (84)
--------------------------------------------------------------------------------
AML /001/00 [ 4x ]
AML /002/00 [ 4x, 6x, 8x ]
BeAll000/P40/00 [ 4x ]
BeAll000/P80/00 [ 4x, 6x, 8x ]
CMC MAG /E01/00 [ 4x, 6x, 8x ]
CMC MAG /F01/00 [ 4x ]
CMC MAG /F01/01 [ 4x, 6x, 8x ]
CMC MAG /M01/00 [ 4x, 6x, 8x, 12x, 16x ]
CMC MAG /R01/00 [ 4x ]
DAXON /AZ1/00 [ 4x ]
DAXON /AZ2/00 [ 4x, 6x ]
DAXON /AZ3/00 [ 4x, 6x, 8x, 12x, 16x ]
DDT 01 /001/01 [ 4x ]
DT-D02 /02 /00 [ 4x ]
DT-D03 /004/00 [ 4x, 6x, 8x ]
EMDP /000/00 [ 4x ]
GSC502 /002/00 [ 4x ]
GSC503 /H01/00 [ 4x ]
INFODISC/R10/02 [ 4x ]
INFODISC/R20/00 [ 4x, 6x, 8x ]
INFOME /R20/00 [ 4x, 6x, 8x ]
ISSM /001/00 [ 4x, 6x, 8x ]
LD /001/00 [ 2.4x ]
LD /A02/00 [ 4x ]
LD /S03/00 [ 4x, 6x, 8x ]
LONGTEN /002/00 [ 4x ]
MAM /M02/00 [ 4x, 6x, 8x ]
MAXELL /001/00 [ 4x ]
MAXELL /002/00 [ 4x, 6x, 8x ]
MAXELL /003/00 [ 4x, 6x, 8x, 12x, 16x ]
MBIPG101/R03/00 [ 4x ]
MBIPG101/R04/01 [ 4x, 6x, 8x ]
MBIPG101/R05/01 [ 4x, 6x, 8x, 12x, 16x ]
MCC /001/00 [ 4x ]
MCC /002/00 [ 4x ]
MCC /003/00 [ 4x, 6x, 8x ]
MCC /004/00 [ 4x, 6x, 8x, 12x, 16x ]
MEDIA ID/001/00 [ 4x ]
MPOMEDIA/001/00 [ 2.4x ]
MPOMEDIA/040/00 [ 4x ]
MPOMEDIA/080/00 [ 4x, 6x, 8x ]
MUST /002/01 [ 4x, 6x, 8x ]
MUST 002/ /02 [ 4x ]
NANYA /CHX/00 [ 4x, 6x, 8x ]
NANYA /CLX/00 [ 4x, 6x, 8x ]
NANYA /DR /00 [ 2.4x ]
NANYA /RJB/00 [ 4x ]
OPTODISC/OP1/00 [ 2.4x ]
OPTODISC/OP2/00 [ 2.4x ]
OPTODISC/OR4/00 [ 4x ]
OPTODISC/OR8/00 [ 4x, 6x, 8x ]
Philips /081/00 [ 4x, 6x, 8x ]
PHILIPS /C08/00 [ 4x, 6x, 8x ]
PHILIPS /C16/01 [ 4x, 6x, 8x, 12x ]
Plasmon /c01/00 [ 4x, 6x, 8x ]
PRODISC /R01/00 [ 2.4x ]
PRODISC /R02/00 [ 4x ]
PRODISC /R03/00 [ 4x, 6x, 8x ]
PRODISC /R04/04 [ 4x, 6x, 8x, 12x, 16x ]
RICOHJPN/R00/00 [ 4x ]
RICOHJPN/R01/02 [ 4x ]
RICOHJPN/R02/03 [ 4x, 6x, 8x ]
RICOHJPN/R03/04 [ 4x, 6x, 8x, 12x, 16x ]
RITEK /M02/01 [ 4x ]
RITEK /R01/00 [ 2.4x ]
RITEK /R02/01 [ 4x ]
RITEK /R03/01 [ 4x, 6x, 8x ]
RITEK /R03/02 [ 4x, 6x, 8x ]
RITEK /R04/01 [ 4x, 6x, 8x, 12x, 16x ]
SKYMEDIA/R01/00 [ 2.4x ]
SONY /D01/00 [ 4x ]
SONY /D11/00 [ 4x, 6x, 8x ]
SONY /D21/00 [ 4x, 6x, 8x, 12x, 16x ]
TDK /001/00 [ 4x ]
TDK /002/00 [ 4x, 6x, 8x ]
TDK /003/00 [ 4x, 6x, 8x, 12x, 16x ]
ULTRAN /202/00 [ 4x ]
VDSPMSAB/001/01 [ 4x ]
WINGSHIN/001/31 [ 4x, 6x, 8x ]
WINGSHIN/G04/00 [ 4x ]
YUDEN000/T01/00 [ 4x ]
YUDEN000/T01/01 [ 4x ]
YUDEN000/T02/00 [ 4x, 6x, 8x ]
YUDEN000/T03/00 [ 4x, 6x, 8x, 12x, 16x ]
--------------------------------------------------------------------------------
+R9 Media Codes (7)
--------------------------------------------------------------------------------
CMC MAG /D01/00 [ 2.4x ]
INFOME /D01/00 [ 2.4x ]
MKM /001/00 [ 2.4x ]
PHILIPS /CD2/00 [ 2.4x ]
PRODISC /D01/00 [ 2.4x ]
RICOHJPN/D00/01 [ 2.4x ]
RITEK /D01/01 [ 2.4x ]
--------------------------------------------------------------------------------
+RW Media Codes (26)
--------------------------------------------------------------------------------
CMC MAG /W01/00 [ 2.4x ]
CMC MAG /W02/00 [ 4x ]
DAXON /D41/00 [ 4x ]
DAXON /D42/00 [ 4x ]
INFODISC/A01/00 [ 2.4x ]
INFODISC/A10/00 [ 4x ]
MBIPG101/W03/00 [ 2.4x ]
MBIPG101/W04/00 [ 4x ]
MCC /A01/00 [ 2.4x ]
MKM /A02/00 [ 4x ]
NANYA /DRW/00 [ 4x ]
NANYASC /DRW/00 [ 2.4x ]
OPTODISC/OP1/00 [ 2.4x ]
OPTODISC/OP4/01 [ 4x ]
PHILIPS /010/02 [ 4x ]
PHILIPS /041/00 [ 4x ]
PRODISC /W01/00 [ 2.4x ]
PRODISC /W02/00 [ 4x ]
RICOHJPN/W01/00 [ 2.4x ]
RICOHJPN/W11/01 [ 4x ]
RITEK /001/01 [ 2.4x ]
RITEK /004/30 [ 4x ]
RITEK /W04/00 [ 4x ]
SENTINEL/W01/00 [ 2.4x ]
SENTINEL/W02/00 [ 4x ]
SONY /S11/00 [ 4x ]
--------------------------------------------------------------------------------
-R Media Codes (95)
--------------------------------------------------------------------------------
4M SYS 202C1/52 [ 4x ]
AML /52 [ 4x ]
AN30 /52 [ 4x ]
AN31 /52 [ 4x ]
AN32 /52 [ 4x ]
Auvistar /50 [ 2x ]
BeAll G00001/50 [ 2x ]
BeAll G40001/52 [ 4x ]
BeAll G80001/52 [ 4x, 6x, 8x ]
CMC MAG. /50 [ 2x ]
CMC MAG. AE1/52 [ 4x, 6x, 8x, 12x ]
CMC MAG. AF1/52 [ 4x ]
DATA TRACK /52 [ 4x ]
DAXON004 /52 [ 4x ]
DAXON008S /52 [ 4x, 6x, 8x, 12x ]
DKM_01 /52 [ 4x ]
Dvsn /52 [ 4x ]
FORNEX001 /50 [ 2x ]
FORNEX101 /52 [ 4x ]
FUJIFILM03 /52 [ 4x, 6x, 8x ]
GSC001 /50 [ 2x ]
GSC001 /52 [ 4x ]
GSC002 /52 [ 4x ]
GSC003 /52 [ 4x, 6x, 8x ]
INFODISC-R01/52 [ 4x ]
INFODISC-R20/52 [ 4x, 6x, 8x ]
ISSM 01 /52 [ 4x ]
LD /50 [ 2x ]
LEADDATA /50 [ 2x ]
LEADDATA S03/52 [ 4x, 6x, 8x ]
LEADDATA01 /52 [ 4x ]
LGE04 /52 [ 4x ]
LGE08 /52 [ 4x, 6x, 8x ]
LONGTEN 001 /52 [ 4x ]
LONGTEN 009 /52 [ 4x ]
MAM4XG01 /52 [ 4x ]
MBI /50 [ 2x ]
MBI 01RG20 /52 [ 4x ]
MBI 03RG30 /52 [ 4x, 6x, 8x ]
MCC 00RG200 /50 [ 2x ]
MCC 01RG20 /52 [ 4x ]
MCC 02RG20 /52 [ 4x, 6x, 8x ]
MCC 03RG20 /00 [ 4x, 6x, 8x, 12x ]
MCI4XG01 /52 [ 4x ]
MCIG01 /50 [ 2x ]
ME 153 /52 [ 4x ]
MEI 00V001 /50 [ 2x ]
MUST 001 /52 [ 4x ]
MXL RG01 /50 [ 2x ]
MXL RG02 /52 [ 4x ]
MXL RG03 /52 [ 4x, 6x, 8x ]
NANYA-JC001 /52 [ 4x ]
ONIDTECH /52 [ 4x ]
OPTODISCK001/50 [ 2x ]
OPTODISCK001/52 [ 4x ]
OPTODISCR004/52 [ 4x ]
OPTODISCR008/52 [ 4x, 6x, 8x ]
Plasmon1A /52 [ 4x, 6x, 8x ]
POSG04 /52 [ 4x ]
POSG06 /52 [ 4x, 6x, 8x ]
POSJ 01 /50 [ 2x ]
PRINCO /50 [ 2x ]
PRINCO /52 [ 4x ]
PRINCO8X01 /52 [ 4x, 6x, 8x ]
PRINCO8X02 /52 [ 4x, 6x, 8x ]
ProdiscF01 /52 [ 4x, 6x, 8x ]
PRODISCG02 /50 [ 2x ]
ProdiscS03 /52 [ 4x ]
ProdiscS04 /52 [ 4x, 6x, 8x ]
PVC001001 /00 [ 2x ]
PVCR001002 /52 [ 4x ]
RITEKG03 /50 [ 2x ]
RITEKG04 /52 [ 4x ]
RITEKG05 /52 [ 4x, 6x, 8x ]
RITEKG06 /52 [ 4x, 6x, 8x ]
RITEKM02 /52 [ 4x ]
SKC Co.,Ltd./52 [ 4x ]
SKC M801 /52 [ 4x, 6x, 8x ]
SONY /50 [ 2x ]
SONY04D1 /52 [ 4x ]
SONY08D1 /52 [ 4x, 6x, 8x, 12x ]
TAIYOYUDEN /50 [ 2x ]
TAROKO-MX4 /52 [ 4x ]
TDKG02000000/50 [ 2x ]
TTG01 /52 [ 4x ]
TTG02 /52 [ 4x, 6x, 8x ]
TTH01 /52 [ 4x, 6x, 8x ]
TTH02 /00 [ 4x, 6x, 8x ]
TYG01 /52 [ 4x ]
TYG02 /52 [ 4x, 6x, 8x ]
UME01 /52 [ 4x, 6x, 8x ]
VANGUARD /52 [ 4x ]
VDSPMSAB 01 /52 [ 4x ]
VDSP*SAB 01 /52 [ 4x ]
Yi Jhan 001 /52 [ 4x ]
--------------------------------------------------------------------------------
-RW Media Codes (28)
--------------------------------------------------------------------------------
CMCW02 /00 [ 2x ]
CMCW03 /00 [ 4x ]
DAXON_RW2X01/00 [ 2x ]
JVC/VictorT7/00 [ 1x ]
JVC0VictorD7/00 [ 4x ]
JVC_VictorW7/00 [ 2x ]
MCC 00RW11N9/00 [ 1x ]
MCC 01RW11n9/00 [ 2x ]
MCC 01RW4X /00 [ 4x ]
OPTODISCK001/20 [ 1x ]
OPTODISCK001/21 [ 2x ]
OPTODISCW002/21 [ 2x ]
OPTODISCW004/21 [ 4x ]
PRINCO /20 [ 1x ]
PRINCO /21 [ 2x ]
PRINCORW0004/31 [ 2x ]
Prodisc DW04/21 [ 2x ]
Prodisc DW06/00 [ 4x ]
ProdiscDVDRW/00 [ 1x ]
PVCW00D002K9/21 [ 2x ]
PVCW00V00245/00 [ 2x ]
RITEK000V11A/00 [ 1x ]
RITEKW01 /00 [ 2x ]
RITEKW04 /00 [ 2x ]
SONY000000U9/00 [ 1x ]
TDK501saku]3/20 [ 1x ]
TDK502sakuM3/00 [ 2x ]
TDK601saku /00 [ 4x ]
```