Quote from: abalore on Today at 14:25If there are additional bits in the GA are they actually working bits or dormat?Quote from: GUNHED on Yesterday at 22:31Quote from: Bread80 on 21:57, 25 September 23Would be nice to have this ASIC expanded from 15 to 255 sprite colors (the space is there. only 4 bits are used of each 8 bit for every dot in the sprite data area). Well, of course it would need to double the internal RAM of the ASIC. Just an idea.Quote from: d_kef on 16:59, 24 September 23That's a really great idea! Thanks for open sourcing it.Do you mean ASIC as in the Plus models or the gate array? If it's the latter I have a prototype working replacement using a pair of RP2040 (RPi Pico) which needs miniaturising and finishing off.
Are there also plans for an ASIC module?
d_kef
I find also interesting to expand the CPC palette to 32 colors, the bit provision for it already exists in the GA.
Quote from: Blue_0724 on Today at 13:13The Amstrad GT64 does not have a composite video input. Only RGB, sync and lum.Luminance is kind of a monochrome composite video signal.
Quote from: abalore on Today at 12:18You can also try to connect the composite video directly to the composite input without the ICdid ou mean Lum?
Quote from: GUNHED on Yesterday at 22:31Quote from: Bread80 on 21:57, 25 September 23Would be nice to have this ASIC expanded from 15 to 255 sprite colors (the space is there. only 4 bits are used of each 8 bit for every dot in the sprite data area). Well, of course it would need to double the internal RAM of the ASIC. Just an idea.Quote from: d_kef on 16:59, 24 September 23That's a really great idea! Thanks for open sourcing it.Do you mean ASIC as in the Plus models or the gate array? If it's the latter I have a prototype working replacement using a pair of RP2040 (RPi Pico) which needs miniaturising and finishing off.
Are there also plans for an ASIC module?
d_kef
Quote from: andycadley on Today at 12:02That would mean a completely new chip instead of a couple of RAM bytes more.Quote from: GUNHED on Yesterday at 22:31Well you'd also have to find space for another 239 palette registers.Quote from: Bread80 on 21:57, 25 September 23Would be nice to have this ASIC expanded from 15 to 255 sprite colors (the space is there. only 4 bits are used of each 8 bit for every dot in the sprite data area). Well, of course it would need to double the internal RAM of the ASIC. Just an idea.Quote from: d_kef on 16:59, 24 September 23That's a really great idea! Thanks for open sourcing it.Do you mean ASIC as in the Plus models or the gate array? If it's the latter I have a prototype working replacement using a pair of RP2040 (RPi Pico) which needs miniaturising and finishing off.
Are there also plans for an ASIC module?
d_kef
I'm not sure that's how I'd use those bits if I were enhancing the Plus models though. Better options might be alpha transparency or the ability to mark pixels as appearing "behind" screen colours somehow.
Quote from: abalore on Today at 12:18You can also try to connect the composite video directly to the composite input without the ICThe Amstrad GT64 does not have a composite video input. Only RGB, sync and lum.
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