Project STacy (STaceX, TOS 2.06 & others)

General discussions or ideas about hardware.
Atarian Computing
Posts: 148
Joined: Tue Aug 22, 2017 4:27 am

Re: Project STacy (STaceX, TOS 2.06 & others)

Post by Atarian Computing » Sat Oct 28, 2017 8:23 am

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exxos
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Re: Project STacy (STaceX, TOS 2.06 & others)

Post by exxos » Sat Oct 28, 2017 9:31 am

:bravo:
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.

keli
Posts: 56
Joined: Tue Aug 22, 2017 1:34 pm

Re: Project STacy (STaceX, TOS 2.06 & others)

Post by keli » Sat Oct 28, 2017 10:38 am

Do you happen to have a part number/digikey link/etc. for the mega bus connector on that adapter?

Atarian Computing
Posts: 148
Joined: Tue Aug 22, 2017 4:27 am

Re: Project STacy (STaceX, TOS 2.06 & others)

Post by Atarian Computing » Sat Oct 28, 2017 1:10 pm

keli wrote:
Sat Oct 28, 2017 10:38 am
Do you happen to have a part number/digikey link/etc. for the mega bus connector on that adapter?
Yes, it’s this one: https://www.digikey.fi/product-detail/e ... ND/1036427

Atarian Computing
Posts: 148
Joined: Tue Aug 22, 2017 4:27 am

Re: Project STacy (STaceX, TOS 2.06 & others)

Post by Atarian Computing » Sun Nov 05, 2017 7:05 am

Stuff I did on Saturday.

Waiting for EPROMs.
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I managed to get my “development” unit up and running. Had to hack in a Mega ST keyboard and external trackball. I also needed to replace 5 transistors on the DC/DC board. 2xD1060 and 3xC3691.
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My messy but working sipps. Need to be almost 90 degree angle, otherwise they won’t fit.
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Atarian Computing
Posts: 148
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Re: Project STacy (STaceX, TOS 2.06 & others)

Post by Atarian Computing » Wed Nov 08, 2017 4:18 pm

Just waiting for the MACH210 chips to be programmed and shipped. Fingers crossed that it works!

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Atarian Computing
Posts: 148
Joined: Tue Aug 22, 2017 4:27 am

Re: Project STacy (STaceX, TOS 2.06 & others)

Post by Atarian Computing » Wed Dec 20, 2017 7:24 am

Hi, just a brief message from my website:
I apologize for no updates in the recent months. I'm still fully committed to running this website. Due to major changes in my full-time employment, all my free time has been diverted to learning the ropes and teaching myself new skills. The changes are very positive and my employer has remained the same. I now work in IT for a major insurance company where I can fully utilize my skillset.

With the holiday season coming up as well, I expect that it will be a couple of months before I can start working on my Atari projects. Merry Christmas and a Happy New Year to all.

Josh.

Atarian Computing
Posts: 148
Joined: Tue Aug 22, 2017 4:27 am

Re: Project STacy (STaceX, TOS 2.06 & others)

Post by Atarian Computing » Tue Apr 24, 2018 11:18 am

Alright, I'm slowly starting to get some free time. A generous Atarian has promised to lend me their non-working Magnum ST with a known working SIMM. I'm sure that I can troubleshoot with that. From my website:
So, it's almost the end of April. Crazy. Things have been great at my new job. I've learned a lot. I've already programmed several tools with GUIs with my new best friend; PowerShell. It's amazing.

I feel like I'm at a place where I can focus a bit of my time to running Atarian Computing again although, I will be busy renovating my place of operations (roof and exterior). You should be hearing more of me in the coming weeks.

Atarian Computing
Posts: 148
Joined: Tue Aug 22, 2017 4:27 am

Re: Project STacy (STaceX, TOS 2.06 & others)

Post by Atarian Computing » Mon Jun 04, 2018 12:29 pm

Well, regarding the Magnum ST, I haven't really learned enough to make conclusions. I did get a loaner and was able to confirm that my SIMMs were ok.

However, the loaner's MACH210 wouldn't even boot on my unit and vice versa. With the same ROMs too and same machine. So don't know what to think of that. The fact that my Magnum ST boots (It has TOS 2.06) says that my MACH210s at least work in decoding and therefore one could expect it to work in the other department which is alt-ram. Why then would that Mach210 not even boot on a known working Magnum ST? And why won't my Magnum ST boot with a MACH210 from a known working Magnum ST? So I decided that I'll shelve this project for now and pick it up some other time. I did some repairs and improvements that were necessary on the loaner unit and sent it back.

Since getting a blank PAK68/3 PCB, I've toyed with the idea of a SuperSTacy like DarkLord's. But I'd really hate to work with the original DC to DC board due to its size and performance (or lack thereof). Despite the various opinions of Pico PSU's and their place in Atari machines, I think everyone would agree that it would be justified due to space restrictions.

Problem is the LCD bias supply of -20V. I know that one could use a MAX629 (https://datasheets.maximintegrated.com/en/ds/MAX629.pdf) in a circuit to generate that voltage but I'm afraid of high frequency noise that would affect everything and show up everywhere and also the resulting spikes from the switching.

How would one go ahead and create a suitable -20V for the Stacy LCD?

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