This page lets you have a peek as to what's inside the Digitrex GK-705 DVD player, disable Macrovision, UOP, CGMS, and change the background picture.

This is an overall look at the guts of the machine.
This is a look at the underneath of the disk drive assembly
This is a closeup of the underneath of the laser assembly
This is a look at the power supply
This is a high resolution look at the main board. (2.1Mb JPG)
Here is the "service manual" for the GK-705, its only redeeming feature is the schematics.

Following, are the ICs on the main processor board that do the more gusty work, not all are listed- glue logic has been left out.

ADV7170     Closeup Datasheet (PDF)       PAL/NTSC Video Encoder
AT49F001    Closeup Datasheet (PDF)       1Mb Flash memory (128K x 8 bit)
AT49F8192  Closeup Datasheet (PDF)       8Mb Flash memory (512K x 16 bit)
BA5954        Closeup Datasheet (PDF)       Four Channel BTL Driver for CDROM
ES4408FD    Closeup Product Brief (PDF)  DVD Processor
IS41C16256  Closeup Datasheet (PDF)       4Mb Dynamic Ram with EDO page mode (256K x 16 bit)
IS42S100      Closeup Datasheet (PDF)       16Mb Synchronous Dynamic Ram (512K x 16 bit x 2 bank)
M12L16161  Closeup Datasheet (PDF)       16Mb Synchronous Dynamic Ram (512K x 16 bit x 2 bank)
MT1366        Closeup Product Description   CD/DVD laser driver/interface
MT1388        Closeup Product Description   DVD Spindle/Servo controller
PCM1602     Closeup Datasheet (PDF)        24bit 192Khz 6 channel A/D converter

The ORIGINAL firmware for this unit is stored within the 8Mb Flash memory IC, and can be downloaded here.
The PATCHED firmware to disable UOP, Macrovision and CGMS is here.

Make sure YOUR player is EXACTLY the same as mine, look at the pictures, have a look inside your player. Make sure all the chips noted above are the same as yours.
If you find your GK-705 is NOT exactly the same as mine, please, help the cause, take some pictures and put them up on the web, or email me first and tell me you're sending me them. DON'T PATCH YOUR DVD PLAYER IF THIS IS THE CASE.  It could turn your DVD player into a fancy paperweight.
As per usual, I will not be responsible for anything that happens to your machine, I can only claim it works for me.

I will not be detailing instructions on how to blow new firmware into the GK-705, I will only outline the 'need to know' differences between this, and 'generic' DVD firmware uploads.
If you've never done this before, you need to either be brave, or stupid. I HIGHLY recommend you have a look at Area 450 ,  this site has lots of helpful information about how to blow new firmware into your DVD player.  MAKE SURE YOU READ AND UNDERSTAND WHAT IS INVOLVED BEFORE PROCEEDING!

Click here to see how to do it.

Thanks to the guys at Area 450, without their assistance, I would not have been able to do it.  Also, many thanks to TonyH who pretty much held my hand the whole way (well, ok, he did it himself).

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