32768 color dual Shifter ST mod - schematics lost?

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exxos
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Re: 32768 color dual Shifter ST mod - schematics lost?

Post by exxos »

mrbombermillzy wrote: Sat Feb 05, 2022 11:11 pm Absolutely none on ebay, or Exxos' store. (I don't suppose trying to get a batch from Brad would help his anti-reseller paranoia, but that might be an option).
As soon as I scrap a machine and put the parts in the store, they go. If I had some I would offer them for the cause, but most of my machines have been stripped these days :( It would probably be cheaper to get them off evilbay as complete machines than get some from brad. Though the prices just got insane lately.. Will refrain from the rant about all that :)
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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SophieRose
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Re: 32768 color dual Shifter ST mod - schematics lost?

Post by SophieRose »

mrbombermillzy wrote: Sat Feb 05, 2022 11:11 pm @HigashiJun and @SophieRose ...
You two had better start collecting shifters then. :D I'm not even sure it's viable to produce this board in any sort of volume with the lack of the earlier ST shifters around.

Absolutely none on ebay, or Exxos' store. (I don't suppose trying to get a batch from Brad would help his anti-reseller paranoia, but that might be an option).

I've had to pick up a shabby STF machine that didn't work (STs aren't cheap anymore) and PRAY that the previous owner didn't fry the machine, or drop it in the bath or whatever, so at least the shifter works.
I have a spare shifter waiting patiently 8-)
Musician and Atari ST user. https://sophie-rose.bandcamp.com
Mega ST4 T28, 1040STE & 520STM, Amiga 600, Link 480Z, Amstrad 6128 plus, Timex2048, C128, C64, MSX HB201P. Plus too many more.
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HigashiJun
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Re: 32768 color dual Shifter ST mod - schematics lost?

Post by HigashiJun »

sporniket wrote: Sat Feb 05, 2022 11:01 pm
SophieRose wrote: Sat Feb 05, 2022 10:00 pm Would love to give one of these a go in my mega 8-)
HigashiJun wrote: Sat Feb 05, 2022 10:18 pm Yup, I had the same idea.

There is plenty of room in a Mega, so should fit without any problem.
I take note of your interest. I prefer to wait to have some results first, though.
Thanks sporniket !
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HigashiJun
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Re: 32768 color dual Shifter ST mod - schematics lost?

Post by HigashiJun »

mrbombermillzy wrote: Sat Feb 05, 2022 11:11 pm @HigashiJun and @SophieRose ...
You two had better start collecting shifters then. :D I'm not even sure its viable to produce this board in any sort of volume with the lack of the earlier ST shifters around.

Absolutely none on ebay, or Exxos' store. (I don't suppose trying to get a batch from Brad would help his anti-reseller paranoia, but that might be an option).

I've had to pick up a shabby STF machine that didn't work (STs aren't cheap anymore) and PRAY that the previous owner didn't fry the machine, or drop it in the bath or whatever, so at least the shifter works.
I think I have one somewhere in my spare parts.
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JezC
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Re: 32768 color dual Shifter ST mod - schematics lost?

Post by JezC »

I'm very interested in this project too...and have the Mega STs plus the H4/H5 boards as possible candidates.

I should have the odd 'spare' shifter amongst my collection but the H4 & H5 builds have used up some of them. Guess I need to fault find a few of the non-booting STs to check what is wrong...

No rush on my side, way too many other projects on the go just now.
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sporniket
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Re: 32768 color dual Shifter ST mod - schematics lost?

Post by sporniket »

@JezC , your interest is noted.

I got the component yesterday, so I am slowly building the prototype for @mrbombermillzy from now.

2022-02-17--01-build-start.jpg
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The most annoying part : take care to put the marking of the values on the top...

2022-02-17--02-resistor-placement.jpg
2022-02-17--02-resistor-placement.jpg (46.57 KiB) Viewed 3184 times
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Re: 32768 color dual Shifter ST mod - schematics lost?

Post by mrbombermillzy »

@sporniket That's great news.

I have a couple of NOS shifters coming from the US, to match the two different ones I have. Will test both pairs once I get it working. (No need to borrow any now! ;) )

I've also re-purposed my TT 16 colour bmp display code for this project (which is 90% finished ATM). Should have got it fully working by the time all the HW arrives. :)
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JezC
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Re: 32768 color dual Shifter ST mod - schematics lost?

Post by JezC »

sporniket wrote: Thu Feb 17, 2022 8:16 am @JezC , your interest is noted.
Thanks...I have a few (working & non-working) boards with socketed shifters, so that might make this easier to test than some of my other projects/repairs!

Hoping all goes well with the prototypes!
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Re: 32768 color dual Shifter ST mod - schematics lost?

Post by sporniket »

I did all the passive, that's all for today.

2022-02-17--03-done-all-the-passives.jpg
2022-02-17--03-done-all-the-passives.jpg (160.02 KiB) Viewed 3134 times

Next session will happen in a few days, it depends on when I am on my own to setup my very little workbench...
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Re: 32768 color dual Shifter ST mod - schematics lost?

Post by sporniket »

woke up early this morning...

2022-02-24--all-done.jpg
2022-02-24--all-done.jpg (204.68 KiB) Viewed 3083 times

and then, looking back at my pictures, I realized that I didn't cleaned the bottom :oops:

2022-02-24--bottom-not-cleaned.jpg
2022-02-24--bottom-not-cleaned.jpg (181.32 KiB) Viewed 3083 times

Now it's time to have a breakfast and go to work.
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