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General Category => Games => Topic started by: dcdrac on 00:43, 25 March 14

Title: Question about the GX4000 Acid chip
Post by: dcdrac on 00:43, 25 March 14
Is it possible to strip the code from an acid chip so you can have it along side an extracted bin file from a Cartridge, and have them saved onto a floppy?
Title: Re: Question about the GX4000 Acid chip
Post by: IanS on 00:59, 25 March 14
The Acid chip is not a rom with code in it. Have you read the Acid wiki page - Amstrad Cartridge Identification Device - CPCWiki (http://www.cpcwiki.eu/index.php/ACID) ?

Title: Re: Question about the GX4000 Acid chip
Post by: TFM on 17:12, 25 March 14
Quote from: dcdrac on 00:43, 25 March 14
Is it possible to strip the code from an acid chip so you can have it along side an extracted bin file from a Cartridge, and have them saved onto a floppy?


This may help you:
ACID Verilog code | The Amstrad CPC news portal (http://www.octoate.de/wp/articles/acid-verilog-code/)

Title: Re: Question about the GX4000 Acid chip
Post by: steve on 17:39, 25 March 14
The program in a cartridge does not interact with the acid chip so you could copy a program to disk, although I do not know what changes may need to be made to make the program run in ram instead of rom.
The acid chip is only there to authorise the plus/GX4000 to execute the program.
Title: Re: Question about the GX4000 Acid chip
Post by: Bryce on 10:01, 27 March 14
The ACID is actually there to make the CPC run at all. Without the ACID chip nothing will work, not even the BASIC prompt would appear.

Bryce.
Title: Re: Question about the GX4000 Acid chip
Post by: arnoldemu on 10:30, 27 March 14
Quote from: dcdrac on 00:43, 25 March 14
Is it possible to strip the code from an acid chip so you can have it along side an extracted bin file from a Cartridge, and have them saved onto a floppy?
I think you are asking:

I want to play cartridge games transferred to disc? Correct?

The problem is these games are written to run from cartridge.

It may be possible to transfer some of them to disc and patch them to work but nobody tried that.
Title: Re: Question about the GX4000 Acid chip
Post by: dcdrac on 21:20, 27 March 14
Quote from: arnoldemu on 10:30, 27 March 14
I think you are asking:

I want to play cartridge games transferred to disc? Correct?

The problem is these games are written to run from cartridge.

It may be possible to transfer some of them to disc and patch them to work but nobody tried that.

Totally correct
Title: Re: Question about the GX4000 Acid chip
Post by: steve on 23:46, 27 March 14
Quote from: Bryce on 10:01, 27 March 14
The ACID is actually there to make the CPC run at all. Without the ACID chip nothing will work, not even the BASIC prompt would appear.

Bryce.

That's what I said, without the acid chip the cartridge software will not run, Basic has the acid chip so it will run.
Title: Re: Question about the GX4000 Acid chip
Post by: BluesBrothers on 05:56, 28 March 14
Any way of fitting the acid somewhere in the CPC and therby circumventing this problem? Though I'm sure if it were that easy someone would have done it by now.
Title: Re: Question about the GX4000 Acid chip
Post by: gerald on 07:34, 28 March 14
Quote from: BluesBrothers on 05:56, 28 March 14
Any way of fitting the acid somewhere in the CPC and therby circumventing this problem? Though I'm sure if it were that easy someone would have done it by now.
AcidInside - CPCWiki (http://www.cpcwiki.eu/index.php/AcidInside) ?
Title: Re: Question about the GX4000 Acid chip
Post by: arnoldemu on 10:35, 28 March 14
Quote from: dcdrac on 21:20, 27 March 14
Totally correct


I haven't tested it yet, but I believe it should be possible to play plus cartridges if you have a ctc-ay and a developer cart.
Title: Re: Question about the GX4000 Acid chip
Post by: Bryce on 10:51, 28 March 14
Quote from: BluesBrothers on 05:56, 28 March 14
Any way of fitting the acid somewhere in the CPC and therby circumventing this problem? Though I'm sure if it were that easy someone would have done it by now.

As you've guessed, it is that easy and it has already been done: AcidInside - CPCWiki (http://www.cpcwiki.eu/index.php/AcidInside) :)

Bryce.
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