Here are the pictures of my Atari STe motherboard.
CA4003290 Rev (C300779-001 Rev B 2) 1989 - Atari STe
- rubber_jonnie
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Re: CA4003290 Rev (C300779-001 Rev B 2) 1989 - Atari STe
I've seen that wire a couple of times now, I strongly suspect it is a factory 'bodge'.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
Re: CA4003290 Rev (C300779-001 Rev B 2) 1989 - Atari STe
I seen it as well. If someone looked up what pin it was on the IC, then see whats going on better. Think they just added a pull up to a pin as the wire goes to the SIL array.rubber_jonnie wrote: ↑Thu Jan 25, 2018 11:07 am I've seen that wire a couple of time now, I strongly suspect it is a factory 'bodge'.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Re: CA4003290 Rev (C300779-001 Rev B 2) 1989 - Atari STe
I have the same wire on my ste.
If i take too long to reply, sorry my cat is sleeping on my laps.
- rubber_jonnie
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Re: CA4003290 Rev (C300779-001 Rev B 2) 1989 - Atari STe
Unless I'm counting wrong, that wire is going to pin 1 of the Shifter.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
Re: CA4003290 Rev (C300779-001 Rev B 2) 1989 - Atari STe
I read somewhere few days ago, that this is for some voltage stability reason. I don't know if this is right or not.
Re: CA4003290 Rev (C300779-001 Rev B 2) 1989 - Atari STe
And here are the pictures after recap and some other little improvements (for example, LMC mixer audio fix). More here:
- https://www.exxosforum.co.uk/atari/last/ ... /index.htm ("STE LMC MIXER AUDIO FIX")
- http://forum.8bitchip.info/hardware-16/ ... er'-error/ ("Fixing STE microwire "mixer" error")
- https://www.exxosforum.co.uk/atari/last/ ... /index.htm ("STE LMC MIXER AUDIO FIX")
- http://forum.8bitchip.info/hardware-16/ ... er'-error/ ("Fixing STE microwire "mixer" error")
Re: CA4003290 Rev (C300779-001 Rev B 2) 1989 - Atari STe
I've noticed that one chip on the left of the processor is missing on my board compared to other STe mainboards. Does anybody know, what is it good for?
Re: CA4003290 Rev (C300779-001 Rev B 2) 1989 - Atari STe
Its the blitter... Its integrated in the large SMT chip to the left on later machines.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.