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santosp

Atari XE Remake Pre Order Thread

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Yes that USB blaster should be fine. You'll need to make a small adapter to flash it since I used a non-standard pin-out due to space. I made myself two: one with a header which required soldering pins to pokeyone and one with pogo pins which doesn't. Happy to do a write up if needed.

 

The latest firmware on my site is 1.23, though I just sent 1.25 to @Duddie. I'll upload it tonight.

Edited by foft

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Ist ist still possible to buy a Pokeymax V3 (Stereo Auto)? I wrote a PM to Duddie, but geht No answer. 

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Done! My new old Atari is doing fine.

@santosp Thank you so much for this great piece of hardware. You did a really good job with this project.

 

MicrosoftTeams-image.png

MicrosoftTeams-image (2).png

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looks great @olix I'm jealous as my build stalled half way due to work and kids. I'm hoping to get it completed by the end of the year though.

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Hi,

if you not need these, then remove that as seen in the picture below.

 

 

009-1600.jpg

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@santosp When looking at the circuit part for the PAL frequencies (around U21 74LS74 and Y2) I noticed that Inductor L8 in the original XE circuit diagram has a value of 15 uH. On your board this has a value of only 1.5 uH. Is this correct?

 

L18-1.jpg

L18-2.jpg

Edited by olix

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@olix

According to the the original inductor on the board,  -check the picture below-  the marking colors are Brown-Green-Gold-Gold .

So if you use this calculator tool, the result is 1.5uH

 

Schematic diagrams have inaccuracies often.

 

 

Untitled.png

Edited by santosp

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PLease, can you explain why you used 2N4401 and 2N3906 and not the original transistor types (2N3904 and MPSA55)?

I'm asking, because i am restoring an old 800XE board with some bad transistors and asking me, if i can/should replace them with the types from your new XE PCB.
 

I would be very grateful for a brief explanation.

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@olix

Maybe because at that time wasn't available by the supplier. They serve the same purpose, so not worry about this.

 

I can't find some reason, why to not you use that on your Atari.

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3 hours ago, _The Doctor__ said:

if they are in the video section, check out myteks choice of transistors and why.

where can i find Myteks post?

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Search for

1088XEL or

1088XLD or

576NUC+
 

all are very Long threads 🙂

 

 

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per the mytek discussions...

Changed Q2 to NPN darlington transistor (MPSA13) for the composite output, which gave additional isolation from S-Video luminance circuit. Also adjusted a few values to render a better picture. The MPSA13 is obsolete, although Jameco has over 3,000 of them in stock. However the currently manufactured BC517 should also make for a good substitute.

 

darlingtons are the way to go in Atari devices for the most part...

Edited by _The Doctor__
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Hello Doc

 

3 hours ago, _The Doctor__ said:

Changed Q2 to NPN darlington transistor (MPSA13) for the composite output, which gave additional isolation from S-Video luminance circuit. Also adjusted a few values to render a better picture. The MPSA13 is obsolete, although Jameco has over 3,000 of them in stock. However the currently manufactured BC517 should also make for a good substitute.

 

Could you at some point give us a recap (no pun intended) of which changes you made?

 

Sincerely

 

Mathy

 

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look in the this and the take a gander in the schematics he provided, he did a good job. The same thing has been mentioned about other platforms such as coleco's and such.

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