BOOSTER 2.2 REVISITED

[exxos]

16MHz CPU working..

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Next up to get 16MHz ROM working...

[exxos]

16MHz ROM access working

Next I need to build the new ROM board and get TOS206 running..

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The bars which hold the PCB are pretty high up off the heater, so the heat on the PCB is about 100C when the bed is 400C. So I put the PCB directly on the heater, now its about 200C. Solder melting fine now... just takes a long time to cool down on its own. At least the PCB oven has a fan to cool down quicker.. but at least its looking like I can solder these SMT sockets without melting them, so that's the main thing

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[exxos]

TOS104/206 decoding now in place and working at 16MHz

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Next up I need to check this all works with blitter....

[exxos]

Blitter working

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[exxos]

I am building 8 of the new ROM boards (thats all the PCBs I have) With the intention of them being sold with the booster.

I have hit a small brick wall in terms of the GAL's again (ran out of GALs!) . Currently even though pin 4 (powerdown) is configured as a IO pin, the chips do not function in the booster board. But I had this problem before anyway. I think my programmer is somehow enabling the powerdown feature even though it is not supposed to be. I was talking to Atmel support a few years ago about this problem, and they pretty much thought my programmer was causing the issue. So I have ordered a new programmer, to see if I have better luck.

[exxos]

Only just got home, but new programmer waiting for me

I got the same one as Icky...

www.amazon.co.uk/gp/product/B07B985LBS

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Quick program of the ATF and the booster is working. So my old TOP3000 programmer doesn't seem to support the ATF properly it seems

Now to order a stock of the Atmel chips...

[PhilC]

Is that a TL86? If so it works really well and very easy.

[exxos]

Is that a TL86? If so it works really well and very easy.

www.amazon.co.uk/gp/product/B07B985LBS

[PhilC]

Is that a TL86? If so it works really well and very easy.

www.amazon.co.uk/gp/product/B07B985LBS

Yes that's the one. Very happy with it here.

[exxos]

Been busy past couple of days building up some V2.3 booster and dualtos boards...

Waiting for the new GAL's & ROM's to arrive now (will be here tomorrow).

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