A Brand new Floppy Emulator

[Jeff_HxC]

Yet an another Floppy Emulator !?! This one seems similar to the sdiskemul (http://atariamiga.free.fr/installation_sdiskemul_amiga600.php)
!

alexh wrote:
I was just curious as to why it was composite output and not RGBS? Does the atmega32 have composite out?

Maybe because in this case you need only 2 wires (gnd + video) ?

[Jeff_HxC]

alexh wrote:
I'd like to see what horsepower you need to generate a composite video signal using only a micro controller and one I/O!

It's not too hard : the composite video is only black and white.
Now it's "easy" to do some video output with an modern uC.

look at this demo :
http://pouet.net/prod.php?which=50141
;-)

[Jeff_HxC]

B&W might be easier.. but we're still taking reasonable amounts of CPU power to time everything to 27MHz.

Yes it's B&W ! Additionnaly 27Mhz is too much to display an 320*200 picture !
An 10Mips uC is enough (look at the sdiskemul!).
 

[Jeff_HxC]

alexh wrote:
Generating the CSYNC timing marks and Luma & Chroma modulated data using nothing but the CPU and a timer?

You sure?? Cool.

I said B&W ;-)

[Jeff_HxC]

Oh you are talking about the Craft Demo. Yes it's an RGB design (impossible to do PAL signal without an true composite output with an simple uC).