exxos IDE interface (untested)

[exxos]

I keep getting asked about adding IDE to my boosters.. well.. This is one circuit I designed months ago.. I just don't have time to build it and test it. If someone wants to build and test it for me.. please do so.. Its the only way IDE will be added as I just don't have the 500 hour days to do everything people want.

ide.JPG

I can't remember much of how I designed it. But I was talking to Esa Sorsa months ago. I tried to emulate better IDE timings as every other IDE solution either doesn't work at all, or has issues with various CF card brands/types. I tried to build in fixes for that and also added in IORDY support (assuming the CF supports it).


Probably this was the initial timings chart I did for it...

fbcbbahj.png

idet.JPG

ide.JPG

Some really good info can be found in this document..

https://www.cpi-tec.jp/cpsd_series/dl/H ... n_V1_1.pdf

Also zipped here..

H_IFD_SI_Specification_V1_1.zip

[Smonson]

Is that all you need to do to communicate with an IDE drive? I thought it would be much more complicated than that.

[exxos]

Is that all you need to do to communicate with an IDE drive? I thought it would be much more complicated than that.

Other circuits use a lot less parts, which is probably why they don't work so good ;)

[Icky]

And we are off.

As discussed with Exxos starting to build this out as basic logic first. Old school logic gates and breadboard fun.

IMG_3363 (2).png

Now on to the second breadboard for the rest of the circuit.

Also to help me break out most of the address and data lines I need for the breadboard instead of having a mess of wires all over the STF Remake board I have a ROM Cart breakout board arriving next week. I will still need to tap a few more lines out from the board as well.

Atari Cart Breakout Board.png

[PhilC]

Cool, looking forward to seeing how you get on.

[Icky]

Cool, looking forward to seeing how you get on.

Thanks - as mentioned by Exxos if we can get it working then we can move it to a PLD

[exxos]

Thanks - as mentioned by Exxos if we can get it working then we can move it to a PLD

Looking good! don't forget to tie un-used inputs high or low though!

The schematic is a altera PLD, but I will probably port it to a Atmel device as just a lot easier to deal with.. Hopefully can fit in the SEC booster PLD ultimately.

Good idea for the cartridge port! I guess a prototype could actually be done on a cartridge with the cart RW mod!

[Icky]

Looking good! don't forget to tie un-used inputs high or low though!

Indeed I was going to tie them off as the last job on the bread board. Thanks for the reminder :)

The schematic is a altera PLD, but I will probably port it to a Atmel device as just a lot easier to deal with.. Hopefully can fit in the SEC booster PLD ultimately.

Have an Atmel ready and waiting for when we get that far.

Good idea for the cartridge port! I guess a prototype could actually be done on a cartridge with the cart RW mod!

Exactly why I was following your RW cart port thread which I think is a good idea :thumbup: I could see the potential of getting the majority of the lines out via the cart port. I will try the RW option out at the same time.

[PhilC]

Which atmel pld are you planning to use? I really should start looking at stuff like that, fpgas etc.

[exxos]

Which atmel pld are you planning to use? I really should start looking at stuff like that, fpgas etc.

ATF1508 mostly. ATF1504 is a bit cheaper but less gates.