A Brand new Floppy Emulator

[ozkano]

this project done by Tolga one of the member of commodore.gen.tr (turkish commodore commidity)

this is the link of the project
http://www.commodore.gen.tr/forum/index.php?topic=2278.0

this is the demonstration
http://i288.photobucket.com/albums/ll185/tabaci/?action=view¤t=tfegoodsmall.flv

the first step of project has finished (Amiga part) it will also support Atari and Msx and much more

-it support all amiga games (no mather dos or track loading)
-supports as DF0: or DF1:
-using regular 9 pin amiga joystick to select game from menu

[ZeBeeDee]

Very interesting!

What about mounting it internally and running it off the host computers power supply?

I wonder if it will be available to the community ... My Turkish is a bit rusty (non-existent lol)

[alexh]

Interesting stuff... they seem to have given it composite video output (Eh??) and a joystick input to control it.

I still think that using a default disk image and using the host computer to control disk selection is the way to go.

I wonder what is at the heart of the design?

[ozkano]

right now it does not support video over lay because video quality decrease so by using a switch you can change video input, amiga or floopy emulator,

this is the protype of this emulator, it fits internal drive and takes power from mother board

[ozkano]

LCD was not prefered lack of limited lines at one time

[countzero]

heart of the design is atmega32 16pc. currently project is on hold due to *rather unexpected* progress of the Turkish team in the Euro 2008 finals

[cv643d]

Cool...

Merhaba by the way  :-)

[alexh]

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

[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) ?

[alexh]

I'd like to see what horsepower and minimum clock speed you would need to generate a colour composite video signal using only a micro controller and one I/O.

Perhaps with a 120MHz microcontroller and using 100% cpu power you *might* do it.

Video encoders are quite complex beasts.

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

[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
;-)

[alexh]

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

You sure?? Cool.

[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 ;-)

[alexh]

The microcontroller demo doesn't use encoded outputs, it has separate RGBHV but still very cool.

20MHz to do the sound and gfx including sync... v cool.

Yes it's B&W ! Additionnaly 27Mhz is too much to display an 320*200 picture!

Yeah, I know. It's the SDTV natural frequency.