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#261 |
Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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I've been doing some research on the TF520 interaction with the Kipper2k A508 board today. I think i've found an equiv of the source code for the CPLD on that board.... Can anyone confirm?
http://pastebin.com/bamEdYk8 |
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#262 |
Registered User
Join Date: Apr 2007
Location: Bremen
Posts: 66
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Looks like the same that is found on the site from the A608 author. The A508 from kipper is based on the A608 (2007 Version).
http://lvd.nedopc.com/Projects/a600_8mb/ |
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#263 |
Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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Excellent. Armed with that I'll devise some measurements and simulations to figure out what's happening
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#264 |
Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
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@plasmab
I am unsure if this helps, but when I spoke with LVD and later with Kipps - discussing the A508 / A608 memory and if it could take a faster clocked CPU (at the time I was looking at a cheap HCMOS68k @14/21MHz ) the bottle neck was the 68k timing with the DRAM. This could be the issue with the tf020 board. |
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#265 |
Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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Sounds about right. I think the CPU is running the cycle too fast for the RAM. I need to get measurements to see how far out I am
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#266 | |
Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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![]() Quote:
Thanks Stedy! |
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#267 | |
Registered User
Join Date: Jan 2008
Location: United Kingdom
Age: 46
Posts: 733
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Quote:
![]() A few things to add to the testbench then or do you measure the real hardware with a logic analyser? |
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#268 |
Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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#269 |
Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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Interesting thing (for me anyways) looking at the code for the A608 is that it doesnt actually do Autoconfig for real. Unsure if Kipper2k's version does a better job of this but the RAM cannot be placed at a location other than 0x200000.
A little miffed at that as i spent ages getting that working on mine... didnt know that was allowed lol. |
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#270 |
-
Join Date: Jul 2003
Location: Helsinki / Finland
Age: 43
Posts: 9,911
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It is not allowed, you did a good thing when you made yours autoconfigure for real. Lots of Amiga hardware these days does not do things the Amiga way. :-(
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#271 |
Registered User
Join Date: Feb 2016
Location: bolton
Posts: 145
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plasmab can you add a PowerPC 604e to an 060 board so i can run amiga os4 if you do you can have my wife free lol lol.
this one be nice http://www.ebay.co.uk/itm/PROCESOR-I...QAAOSwnNBXT9Hg Last edited by jediknight; 03 February 2017 at 00:18. |
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#272 |
Registered User
Join Date: Sep 2007
Location: Melbourne/Australia
Posts: 4,416
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This looks like a nice bit of kit, any plans for an A1200 card?
Well done for getting this far and actually producing something ![]() |
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#273 | |
Registered User
Join Date: Jul 2014
Location: Finland
Posts: 1,186
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Quote:
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#274 |
Registered User
Join Date: Feb 2016
Location: bolton
Posts: 145
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lol well come on an 060 board with ppc would be nice and that one runs at 375 mhz well fast , still i can keep dreaming and hope my wife buggers off lol lol .
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#275 | |
Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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Quote:
In all honesty OS4 doesnt interest me really. If I were going to do a PPC board i'd go down the FPGA route.. probably one with an embedded PPC like the Virtex 5 chips. Actually I have a Virtex 5 board (borrowed) sitting here ... the ML507 but bringing it up is an arse. |
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#276 |
Banned
Join Date: Sep 2016
Location: UK
Posts: 2,917
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#277 |
Registered User
Join Date: Feb 2016
Location: bolton
Posts: 145
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i think i got you thinking of ppc now lol , i think you can doit ,youve proved your a clever amazing person already , i dont think its that much of a challenge to you really ,but heres hoping for the future.
damn i cant give my wife away lol. |
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#278 | |
Banned
Join Date: Dec 2016
Location: Nottingham, UK
Posts: 481
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Quote:
plasmab does have awesome build skills, but he can't get more power from an A500 PSU than it was designed to supply. "The engines 'll no take it Captain." Sorry. As for autoconfig, this is very important on shared expansions, but much less so with accelerators. Reason is, you usually can only plug in one accelerator at a time, so conflict between accelerators is rare - but conflict between A500 accelerators and Zorro kludges for a card slot are not. So he's done things the right way, for a more compatible unit. This is a good thing. Last edited by Pat the Cat; 04 February 2017 at 03:34. |
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#279 | |
Registered User
Join Date: Jun 2009
Location: Dublin, then Glasgow
Posts: 6,379
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Quote:
Someone has already done it. There are many reasons why it mightn't happen on this board; power isn't one. |
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#280 |
Banned
Join Date: Dec 2016
Location: Nottingham, UK
Posts: 481
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Can't really comment as I cannot fully access the link. I'll just go and tinker the schematic and routing for a week or more. See if I can add promised mods for PLCC and whatever.
![]() Just so people have a choice, in terms of what Motorola based chips they can add. The V2 that PlamsaB has released has the BEST on paper combination for maximum overclock, but they are others that use same manufacturing tech, so should be comparable, the Motorola Japan models. I think PLCC is good up to 40MHz, second rate to both, but cheaper too. Last edited by Pat the Cat; 05 February 2017 at 14:33. |
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