Dec 312016
 

As promised, Keith56 released his new bullet hell shooter for the Amstrad CPC 6128 & Plus on the 31st December. In the good old tradition of bullet hell shooters, you are playing a side-scrolling game with enemies, shooting an extreme load of bullets to you, which you have – of course – to avoid. Here is the introduction from the author:

“Chibiko didn’t get any presents from Santa this year… in fact, in the last year she’s been killed by
God, banished from hell, and reincarnated as the enemy of all mankind -so it’s pretty likely she will
never get in his good books again!
Still, she can always do without that ‘gotta-buy-it’ plush doll, and the coal is always useful for
burning ‘leftovers’.
What’s a whole lot less welcome is the strange monsters that have been lurking around the
mountains lately – and now they are infesting HER castle!
Join Chibiko in her unholy battle against the invasion of badly drawn, cliche and generally uninspired
enemies, pummel your way through 4 levels of brainless firepower crazy action – and unleash hell on
the 4 end level boss enemies!”

You can download the game (and its source code) from the website of the game or at the end of this news. Of course, you can also discuss it on the CPCWiki forums.

ChibiAkumas Multidisk
ChibiAkumas Multidisk
ChibiAkumas_Multidisk.7z
Version: v1.06
114.4 KiB
75 Downloads
Details
ChibiAkumas Source With Spritecompiler
ChibiAkumas Source With Spritecompiler
ChibiAkumas_Source_With_Spritecompiler.7z
Version: v1.06
269.9 KiB
68 Downloads
Details
Jul 192016
 

And another fresh release from the Sundown 2016 demoscene party: BarBar by Benediction. BarBar is an intro, which uses the special hardware capabilities of the Amstrad Plus series. If you own such a system, be sure to watch it on the real machine (all others will use WinApe for sure :-)).
You can download the demo at the end of this news or directly from Pouet.net (don’t forget to vote).

Barbar(2016) (Benediction)
Barbar(2016) (Benediction)
Barbar2016-Benediction.zip
110.5 KiB
51 Downloads
Details
Nov 012014
 

After years of inactivity I decided to release two old project, which I started to work on in 2010, publicly on my GitHub account. I have not produced any prototypes yet, so they are currently more a draft. Both projects use a flash EPROM to store the data in the cartridge. The first one is a simple Amstrad Plus / Amstrad GX4000 cartridge, which can be equipped with an original ACID protection chip or with a Xilinx XC9536 CPLD for ACID emulation (you can read more about the emulation here).

SimpleCartridge

The second project is the design of a flash cartridge, which can be programmed on a PC via USB and used in a Amstrad Plus / Amstrad GX4000. You can read more about the design in the README.md.

flash-cartridge

Maybe someone with more time is interested to take over the projects, otherwise I will work on them every now and then…

Sep 102012
 

Impact and Revival released a new demo for the Amstrad Plus computers called Revival’n Impact Coop. You can download it from Pouet.net (don’t forget to vote). It features two parts coded by Ast and F-Key, with graphics by CeD and musics by Shap and Tao:

Revival’n Impact Coop–Part 1
Revival’n Impact Coop–Part 2
Apr 152011
 

Nilquader and I decided to release our Verilog code (based on Nocash’s decryption of the algorithm) to “emulate” the ACID protection chip of the Amstrad Plus. So, you can now find it in the ACID article of the CPCWiki and right here in this posting:

Selec All Code:
1
 

But this isn’t everything about the ACID. We also found a timing problem during the investigation with a logic analyzer, which you can see here:

ACID initialisation by Grim

ACID initialisation (by Grim)

You will find glitches on the /CCLR line which show that the SIN contact should be changed… All in all it is possible to use a fast flip-flop to change the SIN signal when such a glitch occurs (see picture below).

Flip flop for ACID replacement

Flip flop for ACID replacement

You see, this is a very simple schematic, but it isn’t much cheaper than a CPLD, which emulates the full ACID and it comes with a disadvantage: it won’t work with a reset, so you always have to switch the CPC off and on again.

So, have fun with it – maybe Bryce will change his cartridge design and support this solution in the future :-).

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