Guess the upgrades

[Atari8guy]

So I've had this Pal 65XE for a while now.  Haven't used it in ages.  I do not remember all the upgrades in it.  So for fun, I thought I'd post a pic here and see if I could crowdsource the answers...

 

 

[TGB1718]

At a guess

1. Stereo Pokey

2. Four in One OS Switch

3. RAM Upgrade

 

Maybe one other, but not sure

[Justin Payne]

Isn't there a concern with that eprom having the window exposed like that?

[TGB1718]

14 minutes ago, Justin Payne said:

Isn't there a concern with that eprom having the window exposed like that?

Sure is, although normally with case on, not a problem, even with the case off, it's ok for quite some time, but prevention is better than cure.

[Justin Payne]

21 minutes ago, TGB1718 said:

Sure is, although normally with case on, not a problem, even with the case off, it's ok for quite some time, but prevention is better than cure.

That's what I was thinking. I know it would take some time for it to erase but I wouldn't take that chance since stickers are cheap.

[+slx]

Is that a PAL 65XE without ECI? Didn't know those even exist.

[Atari8guy]

That's what I was thinking. I know it would take some time for it to erase but I wouldn't take that chance since stickers are cheap.

You are saying I should cover it up? It’s only been opened for 10 min in the last 10 years.


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[Atari8guy]

Is that a PAL 65XE without ECI? Didn't know those even exist.

I cannot tell you if it’s originally a pal machine, only that it is now. I did not do the mods. (I don’t have those skills).


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[BillC]

1MB SIMM upgrade

Stereo POKEY

Lotharek2009COVOX module

LotharekOS module

 

There's another Lotharek module below the stereo POKEY that I don't know.

 

[+kheller2]

I must say that the SIMM upgrade and how its mounted is very nice.

[Atari8guy]

If my memory is anything, I think this machine has internal SDX as well (of some flavour).  My only PAL display (JVC Broadcast Monitor) is buried in the far back corner of the crawl space, so not easy to get at.  

[TGB1718]

12 hours ago, 8bitguy1 said:

You are saying I should cover it up? It’s only been opened for 10 min in the last 10 years.

Yes, especially as these things are aging, anything opaque and sticky will do, I use write protect tabs of floppys

[7bits]

14 hours ago, Justin Payne said:

Isn't there a concern with that eprom having the window exposed like that?

I have to find the source but I read about someone doing an experiment to erase eproms without an eraser using sunlight, and some other man made sources. I think the one left by the window even after a month was still intact. Now that being said you can still get the space rays to randomly hit it and cause corruption  I still cover mine as right conditions and 1 bit flip can ruin your day. And depending on your quality of sunlight it will be faster/slower to cause corruption. Inside I would not worry as much. 

 

Edit: This stack exchange author says 1-2 weeks of direct sun for full erasure, 20 min for UV which I agree using my eraser, and much longer with other house hold light sources https://electronics.stackexchange.com/questions/34607/erasing-eproms-with-sunlight

Edited February 25, 2021 by 7bits

[candle]

the "unknow" piece is covox

[BillC]

7 hours ago, candle said:

the "unknow" piece is covox

I mentioned COVOX in post#9, it's near the cartridge port and marked on the silkscreen.

The module I don't know is in front of the stereo POKEY module, and to the right of the OS module. 

 

[Justin Payne]

21 hours ago, 8bitguy1 said:

You are saying I should cover it up? It’s only been opened for 10 min in the last 10 years.


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Meh, probably not unless you take it outside and even then it's probably not at risk unless it's for a while...but again, stickers are cheap so slappin' one over that window could be considered insurance. Just don't bathe it in 400nm wavelengths.