exxos IDE interface (untested)

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Icky
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Re: exxos IDE interface (untested)

Post by Icky » Fri Apr 12, 2019 6:10 pm

Nice exxos. So what MOSFET did you go with in the end?

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Re: exxos IDE interface (untested)

Post by exxos » Fri Apr 12, 2019 6:21 pm

Icky wrote:
Fri Apr 12, 2019 6:10 pm
Nice exxos. So what MOSFET did you go with in the end?
NDD02N60Z But I don't plan to actually use that one... I want to use the BSS127 but I only found that after I did the order.
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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Re: exxos IDE interface (untested)

Post by exxos » Sun Apr 21, 2019 10:44 pm

As people are interested how fast the CPU can grab data from the IDE and dump it into RAM, which has nothing to do with how fast the interface or IDE device is...

ide.jpg
ide.jpg (37.81 KiB) Viewed 611 times

This speed is as fast as it can be as it uses a single 68000 bus cycle. Faster speeds needs 16MHz CPU and faster RAM. In theory 16MHZ CPU & RAM would be 2840 kb/sec, where I assume would be Falcon speeds (though CPU caches may give higher apparent speeds, I haven't tested it out.)

Incidentally the interface can easily run at 100MHz.
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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Re: exxos IDE interface (untested)

Post by displaced » Fri May 10, 2019 8:37 pm

Well I started this evening with looking at if I should buy an Ultrasatan and see if I could fit it internally in an STFM... and ended up reading this entire thread instead!

This looks fantastic -- well done to you both -- very tidy, and really reliable it seems! Looking forward to ordering the production version when it's available.

Fingers crossed it'll fit on a C103253 motherboard (even with the daft Marpet SIMM adapter hogging the MMU).

In the meantime, I'm eyeballing my internal Gotek and wondering if there's room on the front of it to hack a slot for an SD card...

Cheers,
Chris

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Re: exxos IDE interface (untested)

Post by exxos » Fri May 10, 2019 11:15 pm

Thanks :)

We always trying to make things fit and be as small as possible.. Mostly we work with the CO70789 boards as they are generally the best ones to work with.
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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Re: exxos IDE interface (untested)

Post by displaced » Sun May 12, 2019 8:40 pm

Looking at the C070789 vs. My board, it looks like mine has more overlap between the MMU and CPU. Might be an issue, might not!

I seem to remember there still being a decent amount of space between the top of the Marpet MMU adapter and the shielding, so should be able to stack the IDE board up to go above. Might even have to replace the IDE pins with a right-angle set (or go maximum-bodge and solder the ribbon wires direct to the board).

Will cross that bridge when I get to it... where there’s a will, there’s a way!

Have read all the way through the beta feedback thread too - sounds like things are going well!

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