http://www.semiconductors.philips.c...gine/index.html

我比較好奇的是800a用的4個重要零組件在 Key features並不能支援DVD-R/-RW
當初philips在設計這三個IC一個雷射頭時是否就只考慮DVD+R/+RW,還是有留後路給DVD-R/-RW??讓韌體能去改變它當初在開IC時的Key features.

Nexperia PNX7850 processor,
(PNX7850 can support write speeds of 8x DVD and 48x CD,
(early versions support 4x DVD),
and read speeds of 16x DVD and 56x CD.)
Delivers industry-leading performance as part of the Philips
DVD+RW chipset:
- Writes at 8x DVD+R, 4x DVD+RW, 32x CD-R,
and 24x CD-RW
- Reads at 16x DVD-ROM,DVD+R,DVD+RW,DVD-R,DVD-RW;
and 48x CD-ROM, CD-DA, CD-R, CD-RW

TZA1047 analog processor,
On its own, the TZA1047 can support write performance of 12x
DVD+R/+RW and 48x CD,and read performance of 20x DVD and 56x CD.
When configured with the Philips DVD+RW chipset, the TZA1047
contributes to write performance of 8x DVD+R, 4x DVD+RW, 32x CD-R,
and 24x CD-RW, and read performance of 16x DVD-ROM and 48x CD.

TZA1042 laser power controller,
TZA1042 can support read/write speeds of up to 20x DVD and
56x CD.When configured with the Philips DVD+RW chipset, the
TZA1042 contributes to write performance of 8x DVD+R, 4x
DVD+RW, 32x CD-R, and 24x CD-RW, and read performance of
16x DVD-ROM and 48x CD.

OPU66.20, a Philips-manufactured optical pickup unit (OPU)
Designed and manufactured by Philips, the OPU66.20 is an optical
pickup unit (OPU) for DVD recorders recommended for use with
the Philips DVD+RW chipset. It delivers industry-leading speed
including write performance of 4x DVD+R/+RW, 32x CD-R, and 12x
CD-RW, and read performance of 16x DVD-ROM and 40x CD. The
OPU66.20 is compatible with the DVD+RW standard, and supports
other DVD and CD formats, including DVD-R/RW and DVD-ROM,
as well as CD-ROM and CD-DA.