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GeneralSomething went wrong here... Pin
Kornfeld Eliyahu Peter26-Apr-18 5:19
professionalKornfeld Eliyahu Peter26-Apr-18 5:19 
GeneralRe: Something went wrong here... Pin
lopatir26-Apr-18 5:57
lopatir26-Apr-18 5:57 
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Daniel Pfeffer26-Apr-18 8:14
professionalDaniel Pfeffer26-Apr-18 8:14 
GeneralRe: Something went wrong here... Pin
Richard Deeming26-Apr-18 6:29
mveRichard Deeming26-Apr-18 6:29 
GeneralRe: Something went wrong here... Pin
RickZeeland26-Apr-18 6:57
mveRickZeeland26-Apr-18 6:57 
GeneralRe: Something went wrong here... Pin
PIEBALDconsult26-Apr-18 8:37
mvePIEBALDconsult26-Apr-18 8:37 
GeneralRe: Something went wrong here... Pin
Daniel Pfeffer26-Apr-18 8:48
professionalDaniel Pfeffer26-Apr-18 8:48 
GeneralHelp me find a good graphics chip! Pin
CodeWraith26-Apr-18 4:44
CodeWraith26-Apr-18 4:44 
Drawing schematics again, this time the graphics hardware. I need a graphics chip (or a modern FPGA based replacement). It should be obtainable and of course offer as many features (HW sprites, resolution, colors, fonts...) as possible, while not requiring too much from the little 8 bit CPU that's going to use it.

Really great chips from the 8 bit age, like the Atari ANTIC, are almost completely unavailable, at least if you don't want to rip apart perfectly working old computers. They also often were designed to work together with a chipset and can get a little complicated when used standalone.

Up to now I have two candidates:
Motorola 6847[^]
Texas Instruments TMS9918[^]

I have a MC6847 in my parts box, but it requires a good load of external logic and offers only a limited alphanumeric mode, but decent monochrome graphics modes (vector graphics on 8 bit computers!)

The TMS9918 needs only two DRAMs and not very much more logic. It managess this video memory itself and allows no direct access from the CPU. That makes things simple. No bus drivers or potential bus collisions. It even has some simple hardware sprites and the alphanumeric modes are better than the modes of the MC6847. Nice and well, but the 'graphics' suck. Big time. Complicated addressing, complicated color restrictions...

Do you know any alternatives? Modern FPGA replacements that produce VGA output instead of composite video?
I have lived with several Zen masters - all of them were cats.

His last invention was an evil Lasagna. It didn't kill anyone, and it actually tasted pretty good.

GeneralRe: Help me find a good graphics chip! Pin
glennPattonWork326-Apr-18 5:14
professionalglennPattonWork326-Apr-18 5:14 
GeneralRe: Help me find a good graphics chip! Pin
CodeWraith26-Apr-18 5:30
CodeWraith26-Apr-18 5:30 
GeneralRe: Help me find a good graphics chip! Pin
Marc Clifton26-Apr-18 6:48
mvaMarc Clifton26-Apr-18 6:48 
GeneralRe: Help me find a good graphics chip! Pin
CodeWraith26-Apr-18 22:19
CodeWraith26-Apr-18 22:19 
GeneralHoly Elephant Didgeridoo Symphonia Batman! Pin
Nagy Vilmos26-Apr-18 4:00
professionalNagy Vilmos26-Apr-18 4:00 
GeneralRe: Holy Elephant Didgeridoo Symphonia Batman! Pin
OriginalGriff26-Apr-18 4:21
mveOriginalGriff26-Apr-18 4:21 
GeneralRe: Holy Elephant Didgeridoo Symphonia Batman! Pin
CodeWraith26-Apr-18 4:53
CodeWraith26-Apr-18 4:53 
GeneralRe: Holy Elephant Didgeridoo Symphonia Batman! Pin
glennPattonWork326-Apr-18 5:21
professionalglennPattonWork326-Apr-18 5:21 
GeneralRe: Holy Elephant Didgeridoo Symphonia Batman! Pin
Nagy Vilmos26-Apr-18 5:30
professionalNagy Vilmos26-Apr-18 5:30 
GeneralRe: Holy Elephant Didgeridoo Symphonia Batman! Pin
CodeWraith26-Apr-18 5:33
CodeWraith26-Apr-18 5:33 
GeneralRe: Holy Elephant Didgeridoo Symphonia Batman! Pin
Gary Wheeler26-Apr-18 6:40
Gary Wheeler26-Apr-18 6:40 
GeneralRe: Holy Elephant Didgeridoo Symphonia Batman! Pin
Nagy Vilmos26-Apr-18 7:06
professionalNagy Vilmos26-Apr-18 7:06 
GeneralCCC 26/4/18 - SOLVED Pin
PeejayAdams25-Apr-18 22:27
PeejayAdams25-Apr-18 22:27 
GeneralRe: CCC 26/4/18 Pin
pkfox25-Apr-18 22:30
professionalpkfox25-Apr-18 22:30 
GeneralRe: CCC 26/4/18 Pin
OriginalGriff25-Apr-18 22:33
mveOriginalGriff25-Apr-18 22:33 
GeneralRe: CCC 26/4/18 Pin
pkfox25-Apr-18 22:36
professionalpkfox25-Apr-18 22:36 
GeneralRe: CCC 26/4/18 Pin
OriginalGriff25-Apr-18 22:38
mveOriginalGriff25-Apr-18 22:38 

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