Author Topic: Play2CPC (Plus2CPC II) : Extra sound channels and rewritable cartridges  (Read 4004 times)

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Offline Cwiiis

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Yes, the same expansion port, but the Amstrad Plus doesn't have an internal speaker to output the mixed audio.

I imagine that you liked this comment, because you can wait for technical informations from the wiki, next. :)
We have an answer around that but not now, because some work in progress and tests to do first.

Ah, I think I understand - I guess the PlayCity relies on the whole tape-sound-interference thing to mix sound with the internal sound on a CPC464? I guess the only really viable way to mix sound on the Plus without any hardware modifications in that case would be to dedicate a channel to external sound and use DMA... I guess I should get on with making a 8-pin DIN mixer+a/v passthrough board :)
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Offline kawickboy

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I'm interested too.
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Offline entelle42

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Hi, great! I'm in for one unit, please :)
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Offline krusty_benediction

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Just a curiosity question.
Such MSX game https://github.com/GuillianSeed/MetalGear seems to use 16banks of 16kb. We can assume a CPC port would be at least of the same size; probably more due to the potential difference of gfx format.
 Would if fit inside such cartridge ?


Offline Cwiiis

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Just a curiosity question.
Such MSX game https://github.com/GuillianSeed/MetalGear seems to use 16banks of 16kb. We can assume a CPC port would be at least of the same size; probably more due to the potential difference of gfx format.
 Would if fit inside such cartridge ?
16x16Kb = 256Kb and the maximum size of a Plus cart is 512Kb, so I guess short answer: yes.
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Offline GUNHED

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On a plus there is no facility to feed audio back in on the expansion port, and because of this the PlayCity also has a stereo 3.5mm stereo jack for the extra channels.
Actually my 6128plus can do this too, but way more silent. I found out by chance a while ago, when I did something for LambdaSpeak FS.
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Offline GUNHED

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They do occupy mainly different ROMs (lower than &80 or &80 and higher). But they must provide the lower ROM both at least. So they won't be compatible in general, but by smart programming (same lower ROM content etc.) the may work together. There my not be too much use though.
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Offline TotO

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How would be the compatibility with existing cartridge projects such as https://auamstrad.es/the-dandanator-entertainment-system/ ? (When looking only on the cartridge functionnality, not the sound)
It will be not compatible, because the Play2CPC use Amstrad standard ROM paging and cartridge for new CPC games, while the DES use GameBoy Advance cartridge with a custom ROM paging through Z80 opcodes for new Speccy ports.
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Offline krusty_benediction

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Do you plan an USB port to allow cartridge control from a PC ? It seems c4cpc  as such functionality, and it is probably a must to have to quickly test cross-developped programs

Offline TotO

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The C4CPC can already be used on the Plus2CPC and Play2CPC cartridge adapters.
The Play2CPC allows to program a compatible blank cartridge from the CPC. No USB plug.
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Offline GUNHED

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... allows to program a compatible blank cartridge from the CPC. ...
And that's the cool thing! I love hardware which runs at the CPC and with the CPC!
IMHO it suxx bad if I need to buy a PC just to be able to use hardware for the CPC!
Cheers to 100% CPC / Plus hardware.  :) :) :) :) :) :) :) :) :) :) :) :)
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Offline abalore

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Offline abalore

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Offline genesis8

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Zombi mode : need !
And so Barbarian isnt using any CPC+ feature, just maybe using for good the "mass storage" available ?
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Offline abalore

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Zombi mode : need !
And so Barbarian isnt using any CPC+ feature, just maybe using for good the "mass storage" available ?
I have played Barbarian II, Mystical and Tintin on the Moon in the CPC, and you can listen to the music of Navy Seals, Dick Tracy and Robocop II (both title and in-game).
It all depends on the plus feature usage.


And, of course, they all work in a Plus using the Play2CPC adapter.
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Offline GUNHED

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Didn't expect so much Plus games not to use Plus features. Somehow really sad.
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