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exxos IDE interface (untested)

Posted: Sun Nov 19, 2017 9:54 pm
by 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
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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...
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idet.JPG
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ide.JPG
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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
(1.21 MiB) Downloaded 52 times

Re: exxos IDE interface (untested)

Posted: Mon Nov 20, 2017 6:15 am
by Smonson
Is that all you need to do to communicate with an IDE drive? I thought it would be much more complicated than that.

Re: exxos IDE interface (untested)

Posted: Mon Nov 20, 2017 8:32 am
by exxos
Smonson wrote:
Mon Nov 20, 2017 6:15 am
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 ;)

Re: exxos IDE interface (untested)

Posted: Thu Nov 30, 2017 3:06 pm
by exxos
TerribleFire has ported my IDE design over for testing. Awesome stuff!

I particularly enjoyed all the mentions of me ;)



Re: exxos IDE interface (untested)

Posted: Sat Dec 01, 2018 8:26 pm
by 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.

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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
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Re: exxos IDE interface (untested)

Posted: Sat Dec 01, 2018 8:40 pm
by PhilC
Cool, looking forward to seeing how you get on.

Re: exxos IDE interface (untested)

Posted: Sat Dec 01, 2018 8:45 pm
by Icky
Forgottenmyname wrote:
Sat Dec 01, 2018 8:40 pm
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

Re: exxos IDE interface (untested)

Posted: Sun Dec 02, 2018 10:04 pm
by exxos
Icky wrote:
Sat Dec 01, 2018 8:45 pm
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!

Re: exxos IDE interface (untested)

Posted: Sun Dec 02, 2018 10:18 pm
by Icky
exxos wrote:
Sun Dec 02, 2018 10:04 pm
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 :)
exxos wrote:
Sun Dec 02, 2018 10:04 pm
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.
exxos wrote:
Sun Dec 02, 2018 10:04 pm
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.

Re: exxos IDE interface (untested)

Posted: Sun Dec 02, 2018 10:38 pm
by PhilC
Which atmel pld are you planning to use? I really should start looking at stuff like that, fpgas etc.