ALPHA MODIFICATIONS

Open source STF clone project.
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Icky
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Re: ALPHA MODIFICATIONS

Post by Icky » Tue Sep 25, 2018 8:42 pm

exxos wrote:
Tue Sep 25, 2018 2:21 pm
RAM RW FIX

Fixes wrong RW line connected to RAM.
Fix in place

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Re: ALPHA MODIFICATIONS

Post by exxos » Tue Sep 25, 2018 9:08 pm

1772 IRQ TYPO FIX

Pin 28 of the 1772 had a typo and wasn't connected to the MFP...

Bodge wire as shown below...

1772.jpg
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Actually this explains some confusion of the missing pull up on the MFP as it should be going to pin 2 of that pack, that lines doesn't actually have a pull up on the ST diagram.
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: ALPHA MODIFICATIONS

Post by exxos » Tue Sep 25, 2018 10:33 pm

KEYBOARD RESISTOR FIX

Fixes missing pull down (first pull down missing! so yay! :lol: )


Solder a 10K resistor between the 2 highlighted pins..

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Then have a shot of whiskey...
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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Icky
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Re: ALPHA MODIFICATIONS

Post by Icky » Tue Sep 25, 2018 10:39 pm

exxos wrote:
Tue Sep 25, 2018 10:33 pm
KEYBOARD RESISTOR FIX
Does that mean U52 has the same problem - judging by the schematic and your history with pull-ups :)

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Re: ALPHA MODIFICATIONS

Post by exxos » Tue Sep 25, 2018 10:40 pm

Icky wrote:
Tue Sep 25, 2018 10:39 pm
Does that mean U52 has the same problem - judging by the schematic and your history with pull-ups :)
Oddly I added that one :)
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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Icky
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Re: ALPHA MODIFICATIONS

Post by Icky » Tue Sep 25, 2018 10:42 pm

exxos wrote:
Tue Sep 25, 2018 10:40 pm
Icky wrote:
Tue Sep 25, 2018 10:39 pm
Does that mean U52 has the same problem - judging by the schematic and your history with pull-ups :)
Oddly I added that one :)
I think you just like to keep me busy with my soldering iron

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Re: ALPHA MODIFICATIONS

Post by exxos » Tue Sep 25, 2018 10:47 pm

Icky wrote:
Tue Sep 25, 2018 10:42 pm
I think you just like to keep me busy with my soldering iron
At least your keeping up, Not sure where the other 15 people have gotten to...
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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Icky
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Re: ALPHA MODIFICATIONS

Post by Icky » Tue Sep 25, 2018 10:53 pm

exxos wrote:
Tue Sep 25, 2018 10:47 pm
Icky wrote:
Tue Sep 25, 2018 10:42 pm
I think you just like to keep me busy with my soldering iron
At least your keeping up, Not sure where the other 15 people have gotten to...
I think they are watching the fun Forgottenmyname, you and I are having before they embark on this adventure :)

Unfortunately that fix made no change - keyboard still not working or reporting in the diagnostic cart

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Re: ALPHA MODIFICATIONS

Post by exxos » Tue Sep 25, 2018 10:54 pm

Icky wrote:
Tue Sep 25, 2018 10:53 pm
Unfortunately that fix made no change - keyboard still not working or reporting in the diagnostic cart
ah crap.. will have a final snoop then calling it a day.. out all day tomorrow so have to pickup Thursday...
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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Icky
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Re: ALPHA MODIFICATIONS

Post by Icky » Tue Sep 25, 2018 10:55 pm

exxos wrote:
Tue Sep 25, 2018 10:54 pm
Icky wrote:
Tue Sep 25, 2018 10:53 pm
Unfortunately that fix made no change - keyboard still not working or reporting in the diagnostic cart
ah crap.. will have a final snoop then calling it a day.. out all day tomorrow so have to pickup Thursday...
No - not crap. Its fixed the sound. We have sound.

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