I could make some progress in my benq firmware research project :). The media codes in this list are extracted from the firmware, the speeds are my best guesses.
To guess the +RW and +DL speeds I need more input. Please post here the selectable burning speeds with these media types. I need to know if 6x burning is available when 8x is available or 6x is the minimal speed and do not know if 1x and 2.4x burning with +R media is supported.
Media Code Speed Edit V 1.0.3.0
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Firmware: BENQ DVD DD DW1620 B7T9
Bootcode: ATAPI DVD DL DW1600 FS02
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Overall supported media types: 248
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DVD+RDL supported media types: 6
DVD+R supported media types: 87
DVD+RW supported media types: 16
DVD-R supported media types: 120
DVD-RW supported media types: 19
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DVD+RDL supported media types: 6
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INFOME D01
MKM 001
PHILIPS CD2
PRODISC D01
RICOHJPN D00
RITEK D01
DVD+R supported media types: 87
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AML 002 12x,8x,4x
AML 003 16x,12x,8x,4x
BeAll000 P80 12x,8x,4x
BeAll000 PG0 16x,12x,8x,4x
CMC MAG E01 8x,4x
CMC MAG F01 8x,4x
CMC MAG M01 16x,12x,8x,4x
DAXON AZ2 16x,12x,8x,4x
DAXON AZ3 16x,12x,8x,4x
DAXON CY3 16x,12x,8x,4x
DDDessau V30 12x,8x,4x
DT-D03 004 12x,8x,4x
EMDP 000 8x,4x
EMDPAZ01 000 16x,12x,8x,4x
GSC503 H01 8x,4x
GSC503 H01 16x,12x,8x,4x
IMC JPN R01 16x,12x,8x,4x
INFODISC R20 12x,8x,4x
INFOME R20 12x,8x,4x
INFOME R30 16x,12x,8x,4x
IS01 002 8x,4x
ISSM 001 8x,4x
ISSM 003 16x,12x,8x,4x
LD M04 16x,12x,8x,4x
LD S03 16x,12x,8x,4x
LD S04 16x,12x,8x,4x
LGEP16 001 16x,12x,8x,4x
LONGTEN 002 8x,4x
MAM M02 8x,4x
MAM M04 16x,12x,8x,4x
MAXELL 001 8x,4x
MAXELL 002 12x,8x,4x
MAXELL 003 16x,12x,8x,4x
MBIPG101 R04 12x,8x,4x
MBIPG101 R05 16x,12x,8x,4x
MCC 002 8x,4x
MCC 003 12x,8x,4x
MCC 004 16x,12x,8x,4x
MJC 003 12x,8x,4x
MPOMEDIA 080 8x,4x
MUST 002 8x,4x
MUST 006 16x,12x,8x,4x
NAN YA FLX 16x,12x,8x,4x
NANYA ALX 16x,12x,8x,4x
NANYA CHX 12x,8x,4x
NANYA CLX 12x,8x,4x
NSD R40 16x,12x,8x,4x
OPTODISC F16 16x,12x,8x,4x
OPTODISC OR8 8x,4x
OPTODISC R16 16x,12x,8x,4x
PHILIPS C08 8x,4x
PHILIPS C16 16x,12x,8x,4x
POS R01 8x,4x
POS R05 16x,12x,8x,4x
PRODISC R03 12x,8x,4x
PRODISC R04 16x,12x,8x,4x
PRODISC R05 16x,12x,8x,4x
Philips 081 12x,8x,4x
Plasmon1 C01 12x,8x,4x
Plasmon2 C01 16x,12x,8x,4x
RICOHJPN R01 8x,4x
RICOHJPN R02 16x,12x,8x,4x
RICOHJPN R03 16x,12x,8x,4x
RITEK M02 8x,4x
RITEK R02 8x,4x
RITEK R03 12x,8x,4x
RITEK R04 16x,12x,8x,4x
SKC P16 16x,12x,8x,4x
SKYMEDIA R03 8x,4x
SONY D01 8x,4x
SONY D11 16x,12x,8x,4x
SONY D21 16x,12x,8x,4x
TDK 001 8x,4x
TDK 002 16x,12x,8x,4x
TDK 003 16x,12x,8x,4x
ULTRAN 202 8x,4x
ULTRAN 212 16x,12x,8x,4x
VANGUARD 001 8x,4x
VDSPMSAB 002 8x,4x
VDSPMSAB 004 16x,12x,8x,4x
VIVA 002 8x,4x
WFKA11 211 8x,4x
WINGSHIN 001 12x,8x,4x
YUDEN000 T01 12x,8x,4x
YUDEN000 T02 16x,12x,8x,4x
YUDEN000 T03 16x,12x,8x,4x
Yi Jhan 004 16x,12x,8x,4x
DVD+RW supported media types: 16
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CMC MAG W01
CMC MAG W02
INFODISC A01
INFODISC A10
MBIPG101 W03
MCC A01
OPTODISC OP4
PRODISC W01
PRODISC W02
RICOHJPN W01
RICOHJPN W11
RITEK 001
RITEK 004
RITEK 004
SENTINEL W02
SONY S11
DVD-R supported media types: 120
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1FUJIFILM 2x
4M SYS 202C1 4x
AML 4x
AN31 4x
AN32 4x
BeAll G00001 2x
BeAll G16001 16x,12x,8x,6x,4x
BeAll G40001 4x,2x
BeAll G80001 12x,8x,6x
CMC MAG. 2x
CMC MAG. AE1 12x,8x,6x,4x,2x
CMC MAG. AF1 4x,2x
CMC MAG. AM3 16x,12x,8x,6x,4x,2x
DATA TRACK 4x,2x
DAXON004 4x,2x
DAXON008S 16x,12x,8x,6x,4x,2x
DAXON016S 16x,12x,8x,6x,4x
DKMZ01 8x,6x,4x
Dvsn A001 4x
Dvsn-80 8x,6x
FORNEX101 2x
FUJIFILM02 4x,2x
FUJIFILM03 8x,6x,4x,2x
FUJIFILM04 12x,8x,6x
GSC001 4x
GSC001 2x
GSC001 2x
GSC002 4x
GSC003 8x,6x,4x,2x
GSC004 8x,6x
IMC JPN 8x,6x
INFODISC-R01 4x
INFODISC-R20 8x,6x
INFOMEDIAR20 4x
INFOSMART01 8x,6x,4x,2x
ISSM 01 4x
ISSM R01 8x,6x
LEADDATA S03 8x,6x,4x
LEADDATA01 4x
LGE08 8x,6x
LONGTEN 001 4x
LONGTEN 003 4x
LONGTEN 009 4x
MAM4XG01 4x,2x
MAM4XG02 4x,2x
MAM8XG01 8x,6x,4x,2x
MBI 2x
MBI 01RG20 4x
MBI 01RG40 16x,12x,8x,6x
MBI 01RG40 16x,12x,8x,6x
MBI 03RG30 8x,6x,4x
MBI 03RG40 16x,12x,8x,6x,4x
MBI03RG30 8x,6x,4x
MCC 00RG200 2x
MCC 01RG20 4x,2x
MCC 02RG20 12x,8x,6x,4x,2x
MCC 03RG20 16x,12x,8x,6x,4x
MCI4XG01 4x
MJC ME 8x,6x
MUST 001 4x
MUST 003 4x
MUST 007 8x,6x
MXL RG01 2x
MXL RG02 2x
MXL RG03 12x,8x,6x,4x,2x
MXL RG04 16x,12x,8x,6x,4x
NAN YA F02 12x,8x,6x,4x,2x
NANYA-JC001 4x
NSDR40 12x,8x,6x
ONIDTECH 4x
OPTODISCK001 4x
OPTODISCK001 2x,1x
OPTODISCR004 4x,2x
OPTODISCR008 8x,6x,4x,2x
OPTODISCR016 16x,12x,8x,6x,4x
POMS3A 8x,6x,4x
POMSI002 8x,6x,4x,2x
POSG04 4x,2x
POSG06 8x,6x
PRINCO 4x
PRINCO8X02 8x,6x
PRODISCG02 2x
Plasmon1A 8x,6x
ProdiscF01 12x,8x,6x,4x,2x
ProdiscF02 16x,12x,8x,6x,4x
ProdiscS03 4x
ProdiscS04 12x,8x,6x,4x,2x
ProdiscS05 16x,12x,8x,6x
RITEKF1 16x,12x,8x,6x,4x
RITEKG03 2x
RITEKG04 4x
RITEKG05 8x,6x,4x,2x
RITEKG06 12x,8x,6x,4x,2x
RITEKM02 4x
SKC Co.,Ltd. 4x
SKC M801 8x,6x,4x
SONY 2x
SONY04D1 4x
SONY08D1 16x,12x,8x,6x,4x
SONY16D1 16x,12x,8x,6x,4x
TAIYOYUDEN 2x
TAROKO-MX4 4x
TAROKO-MX8 8x,6x
TDKG02000000 2x
TTG01 4x
TTG02 8x,6x,4x
TTH01 12x,8x,6x,4x
TTH02 16x,12x,8x,6x,4x
TYG01 4x,2x
TYG02 16x,12x,8x,6x,4x,2x
TYG03 16x,12x,8x,6x,4x,2x
ULTRAN102 8x,6x
UME01 8x,6x,4x,2x
VANGUARD 4x
VDSPMSAB 01 4x
WFI A40001 4x
WINGSHING04 4x
WINGSHING08 8x,6x,4x
Yi Jhan 001 4x
Yi Jhan 003 8x,6x
DVD-RW supported media types: 19
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CMCW02 2x
CMCW03 4x,2x
DAXON_RW2X01 2x
INFOMEDIA 2x
JVC0VictorD7 4x,2x
JVC_VictorW7 2x
MCC 01RW11n9 2x
MCC 01RW4X 4x,2x
OPTODISCW002 2x
OPTODISCW004 4x,2x
PRINCO 2x
PRINCORW0004 4x,2x
PRINCORW2X01 2x
Prodisc DW04 2x
Prodisc DW06 4x,2x
RITEKW01 2x
RITEKW04 4x,2x
TDK502sakuM3 2x
TDK601saku 4x,2x