Nov 142011

The CPC Wiki needs to move from the server, which was kindly donated by Nurgle, to a new server again. It is aimed to move the Wiki to its new location on wednesday or friday, so don’t be afraid if it isn’t available during that time. You can read more about it in the CPC Wiki forums (if they are available Zwinkerndes Smiley) and I will try to keep you informed about the migration progress. You can find more detailed information during the migration progress when you follow Gryzors Twitter account (@krakout).

[UPDATE-19.11.2011] The Wiki moved to its new server this night and all seems to be working. If there are any problems, please report them in the forums or contact Gryzor.[/UPDATE]

Aug 082011

You might have noticed that the CPC Wiki is currently not accessable. The server will move to a new hosting partner, but here is the original message by Gryzor:

“Hello dear CPCWiki members,As some of you have noticed, there has been some downtime as of lately. The host has said we cannot continue on this server due to the number of connections made, so we’ll probably be moving to a new one. It seems summer is always a period of moving! Anyhow, if you find that the site is gone we will try to keep you updated. You can check out, follow Gryzor on Twitter (username: krakout), or drop by and other CPC-related sites (like Phenix, I’m sure they’ll pick it up sooner or later).

Cross fingers!

The CPCWiki forum Team.”


May 292010

Due to an attack on the host of the CPC Wiki (not the Wiki server itself), the CPC Wiki is currently down. A backup will be uploaded to the server tomorrow. The backup is done every day, so no data will be lost.
Please be patient and wait until the server is up again :).

EDIT: And back again…

Feb 172010

I already wrote a news article about the search on how to decrypt the ACID protection of the Amstrad Plus computers. Now NoCa$h, also known for his No$cpc emulator for DOS, received a Amstrad CPC Plus cartridge by Fano and decrypted the ACID protection of the cartridge within a few days. To do this, he desoldered the ACID protection chip from the cartridge and connected it to the printer port of the PC. With a small program he sent data to the chip and tried to find a way to reproduce the signals of the chip. He found an algorithm which produces the same sequence.
With the decryption of the chip, the last big unknown mystery of the CPC is now resolved. In the future we can produce new cartridges for the CPC Plus and maybe someone will develop a reprogrammable cartridge.

You can find the pseudocode in the thread about the ACID protection in the CPCWiki forums and this information will also be included in the CPCWiki article about the ACID protection in the future, too.

;ACID reverse-engineered 13-16 February 2010 by nocash (Martin Korth)
;below is repeated on every CLK cycle...
CmpVal=13596h, XorVal=0c820h
if PinA0=1 then CmpVal=CmpVal XOR 0000ch, XorVal=XorVal XOR 00004h
if PinA1=1 then CmpVal=CmpVal XOR 06000h, XorVal=XorVal XOR 06000h
if PinA2=1 then CmpVal=CmpVal XOR 000c0h, XorVal=XorVal XOR 00080h
if PinA3=1 then CmpVal=CmpVal XOR 00030h, XorVal=XorVal XOR 00020h
if PinA4=1 then CmpVal=CmpVal XOR 18000h, XorVal=XorVal XOR 08000h
if PinA5=1 then CmpVal=CmpVal XOR 00003h, XorVal=XorVal XOR 00000h
if PinA6=1 then CmpVal=CmpVal XOR 00600h, XorVal=XorVal XOR 00000h
if PinA7=1 then CmpVal=CmpVal XOR 01800h, XorVal=XorVal XOR 00800h
if PinCE=0 AND (ShiftReg OR 100h)=CmpVal then ShiftReg=ShiftReg XOR XorVal
NewBit=ShiftRegBit0 XOR ShiftRegBit9 XOR ShiftRegBit12 XOR ShiftRegBit16
ShiftReg=(ShiftReg SHR 1) + (NewBit SHL 16)
Wait for falling edge on PinCLK
if PinCCLR=0 then ShiftReg=1FFFFh      ;\done at falling CLK edge
PinSIN=ShiftRegBit0                    ;/
;Mind that above is a software example - a hardware solution obviously
;wouldnt require CmpVal and XorVal registers - instead, hardware would
;directly deal with the PinAx (or NOT PinAx) signals.
Sep 192009

The CPC Wiki moves on… The CPC Wiki will be moved to a newer and faster webspace and to a new domain. The Wiki forums now moved first and are now available on the new address Here is the message, which I got from Wiki team:

Dear CPCWiki-forum user,

we moved the forum today to it's new server and domain:

Please update your bookmarks.

The CPCWiki forum Team.

UPDATE: The CPC Wiki moved to the new server, too. Its new address is