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Re: TF1230 Beta Interest (Open Source)
Posted: 15 Sep 2021 14:55
by terriblefire
arkadiusz.makarenko wrote: 15 Sep 2021 14:42
terriblefire wrote: 15 Sep 2021 10:34
There is no reliable way to do an A600 accelerator. So i will not do it.
Btw.
What was the cause that this card initially worked only on some board revisions or was it only related to ROM?
The root cause was that for autovectors it was reading the data bus too fast. before the data was ready. When that happened it read FF instead of the correct autovector number and everything went downhill from there.
Re: TF1230 Beta Interest (Open Source)
Posted: 15 Sep 2021 15:01
by PaulJ_2.0
@terriblefire Any chance of bringing the build cost down further with a QFP 132 footprint? Those 030 CPU's are cheap and plentiful.
Re: TF1230 Beta Interest (Open Source)
Posted: 15 Sep 2021 15:18
by terriblefire
PaulJ_2.0 wrote: 15 Sep 2021 15:01
@terriblefire Any chance of bringing the build cost down further with a QFP 132 footprint? Those 030 CPU's are cheap and plentiful.
i'm not a fan of those. If they dont work you have to resolder them. And they dont work at 50Mhz ... if you're dropping down to 40mhz just use this...
https://www.ebay.co.uk/itm/172657814756 ... SwhvFZCZQ3
Plus like i said.. I'm actually done with Amiga accelerators. Once the current crop are sorted out there will be no more.
Re: TF1230 Beta Interest (Open Source)
Posted: 15 Sep 2021 15:22
by PaulJ_2.0
terriblefire wrote: 15 Sep 2021 15:18
I'm actually done with Amiga accelerators.
Fair enough, it was just an idea.
Re: TF1230 Beta Interest (Open Source)
Posted: 15 Sep 2021 18:55
by PhilC
@exxos made an adaptor from pga to smt cpus. The cpusbwould mostly work ok but required a heatsink to be fitted whereas the pga ones don't as you guys know.
Re: TF1230 Beta Interest (Open Source)
Posted: 15 Sep 2021 19:35
by PaulJ_2.0
PhilC wrote: 15 Sep 2021 18:55
@exxos made an adaptor from pga to smt cpus.
I was more interested in the cost savings by eliminating the need for a socket. I much prefer SMT in any scenario, even swapping out takes me seconds.
Re: TF1230 Beta Interest (Open Source)
Posted: 15 Sep 2021 19:45
by PhilC
@PaulJ_2.0 totally agree, the price of pga cpus has increased greatly but the smt ones haven't yet.
Re: TF1230 Beta Interest (Open Source)
Posted: 15 Sep 2021 20:12
by Higgy
I don't know if they die shrunk the QFP over its life, but the one on a Blizzard MK1 runs hot hot hot.
Re: TF1230 Beta Interest (Open Source)
Posted: 15 Sep 2021 20:47
by kulamario
Gold cpus is best
Smt never run on 50mhz
Re: TF1230 Beta Interest (Open Source)
Posted: 15 Sep 2021 20:56
by Higgy
kulamario wrote: 15 Sep 2021 20:47
Gold cpus is best
Smt never run on 50mhz
Rev C is best as it had a die shrink so less heat produced.
Gold Rev C is the daddy :)