PAK68/2 PCB Project ...

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frank.lukas
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PAK68/2 PCB Project ...

Postby frank.lukas » Thu May 12, 2016 3:08 pm

PAK68/2 PCB Project ...

I want to know how many people have interest in a PCB.

A PCB costs incl. Postage Worldwide 36,- Euro.

-> http://forum.atari-home.de/index.php?to ... #msg207024

I have yet to clarify what Heise says to the project.

Pak_top.jpg


Pak_bottom.jpg
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Re: PAK68/2 PCB Project ...

Postby joska » Thu May 12, 2016 4:54 pm

I would be interested.
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Re: PAK68/2 PCB Project ...

Postby DarkLord » Thu May 12, 2016 6:59 pm

I would be interested as well.

BTW, I can't remember the Pak68/2 features, right off the top of my head. Can
you summarize it here? Thanks!
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Re: PAK68/2 PCB Project ...

Postby frank.lukas » Tue May 17, 2016 1:18 pm

The PAK68/2 works for me fine with the MonSTer and the VOFA ET4000 Graphiccard in my Atari Mega ST.

The PAK has TOS 2.06 on it and on the MonSTer is TOS 1.04 activ.
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Re: PAK68/2 PCB Project ...

Postby frank.lukas » Fri May 27, 2016 11:49 am

platinen_klein.jpg


The PCBs arrive today. In the next week I order parts and build one for a test ...
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Re: PAK68/2 PCB Project ...

Postby frank.lukas » Mon Jun 06, 2016 7:46 pm

It works ...

vorne_klein.jpg


hinten_klein.jpg


.. but it needs some patches.
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Re: PAK68/2 PCB Project ...

Postby DarkLord » Tue Jun 07, 2016 1:20 am

Keep us updated! :)
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Re: PAK68/2 PCB Project ...

Postby frank.lukas » Tue Jun 07, 2016 7:53 am

Who wants to have a ready patched board, please pm me ...

I can also provide the TOS 2.06 Eproms and the GAL Set.
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Re: PAK68/2 PCB Project ...

Postby IRIOS » Sun Jun 19, 2016 7:59 am

Hello everybody !
Probably interested by the acquisition (see mp)
Thanks !

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Re: PAK68/2 PCB Project ...

Postby joska » Tue Jun 21, 2016 6:20 pm

The PCB arrived today, thanks :) Have to order some parts, then get it working. The plan is to attempt to hook up some SRAM and flash-ROM later on.

Btw I was under the impression that this was an 8MHz board, but when I look at the docs tonight it looks like it can run at 16MHz too. Is this correct? Does it work at 16MHz on your ST?
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Re: PAK68/2 PCB Project ...

Postby frank.lukas » Tue Jun 21, 2016 7:27 pm

The PAK68/2 works with 16Mhz and it works fine with my MonSTer Card. The MonSTer have to boot with TOS 1.04 or KAOS and on the PAK68/2 sit the four TOS 2.06 27C512 Eproms.
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Re: PAK68/2 PCB Project ...

Postby joska » Tue Jun 21, 2016 8:25 pm

That is cool. Can you boot without ROMs on the PAK and with 2.06 on the MonSTer?
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Re: PAK68/2 PCB Project ...

Postby DarkLord » Tue Jun 21, 2016 9:14 pm

Just curious - wonder why TOS v2.06 was split up into 4 ROMs instead of 2?
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Re: PAK68/2 PCB Project ...

Postby joska » Tue Jun 21, 2016 9:22 pm

Because of 32 bit access.
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Re: PAK68/2 PCB Project ...

Postby DarkLord » Tue Jun 21, 2016 10:20 pm

joska wrote:Because of 32 bit access.


Ah! (lightbulb goes off). Thanks Jo. Should have remembered that from my Pak board. :)
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Re: PAK68/2 PCB Project ...

Postby joska » Wed Jun 22, 2016 11:28 am

joska wrote:The PCB arrived today, thanks :) Have to order some parts, then get it working. The plan is to attempt to hook up some SRAM and flash-ROM later on.


Parts are ordered. Bought some cheap SRAM, the plan is to mount these in the ROM/RAM-sockets on the PAK. With some slight modification to the board and GALs I should be able to have 2-4Mb of 32-bit fast-RAM in addition to 512Kb 32-bit ROM.
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Re: PAK68/2 PCB Project ...

Postby frank.lukas » Wed Jun 22, 2016 1:29 pm

joska wrote:That is cool. Can you boot without ROMs on the PAK and with 2.06 on the MonSTer?


I think, no ...

There must be a TOS on the PAK68/2, My MonSTer works fine with that. Dual IDE, Altram etc. no problem so far.
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Re: PAK68/2 PCB Project ...

Postby frank.lukas » Wed Jun 22, 2016 1:32 pm

For the Fastram you need TOS 3.06 on the PAK ?

Not sure ...

There are the PAK Patches from TOSPATCH (Markus Heiden) for the TT TOS.

-> https://shop.heise.de/archiv/search/res ... +mit+turbo

There is a GAL for the SRAM, see the PAK Thread on atari-home post by joejoe, I think.
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Re: PAK68/2 PCB Project ...

Postby joska » Wed Jun 22, 2016 1:45 pm

frank.lukas wrote:For the Fastram you need TOS 3.06 on the PAK ?


No, TOS 2.06 (or MagiC, MiNT or EmuTOS) also supports this. I will probably map it to 0x400000, just like the MonSTer alt-RAM.

frank.lukas wrote:There is a GAL for the SRAM, see the PAK Thread on atari-home post by joejoe, I think.


Yes, I had a look at this. Unfortunately I can't use it as-is, since it maps alt-RAM to the same location as TOS 2/3/4 and I intend to use both. So some modification to the board and GAL is required.
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Re: PAK68/2 PCB Project ...

Postby frank.lukas » Wed Jun 22, 2016 1:48 pm

Please make your SRAM Mod public with the JED File so I can build it too ...

I have in mind to at a Magnum TT to the PAK68/2, all on one Board.
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Re: PAK68/2 PCB Project ...

Postby joska » Thu Jun 23, 2016 8:37 am

frank.lukas wrote:Please make your SRAM Mod public with the JED File so I can build it too ...


I will, if I succeed. My idea is very simple - piggyback four 512Kb SRAM's on top of the ROMs and add a separate GAL address decoder. Should in theory be pretty simple stuff. 2Mb fast-RAM isn't much but sufficient for my use.

I have ordered the necessary parts, I guess they'll arrive in a month or so so until then nothing will happen.
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Re: PAK68/2 PCB Project ...

Postby double-decca » Wed Jul 06, 2016 9:45 pm

Hi,

Will the PAK68/2 work with the MegaSTE

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Re: PAK68/2 PCB Project ...

Postby oehansen » Wed Jul 06, 2016 11:58 pm

I'm also interrested

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Re: PAK68/2 PCB Project ...

Postby joska » Thu Jul 07, 2016 7:03 am

double-decca wrote:Will the PAK68/2 work with the MegaSTE


It may, but not out of the box. First of all the PAK is inserted in the ST CPU socket, and the Mega STE has a different socket than the ST. So you need some sort of adapter there. Secondly, not sure how the PAK will work with the Mega STE cache and turbo mode. They will probably have to be disabled all the time.

Also, the PAK is rather big so I'm not sure if it'll fit inside the Mega STE case. Especially if you have some VME card installed.
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Re: PAK68/2 PCB Project ...

Postby frank.lukas » Thu Jul 07, 2016 8:56 am

In these Days I put a PAK68/3 in a Atari Mega STE. The Cache from the STE must be off and the STE must run at 8Mhz ...

I put a 64pin DIL CPU socket on the Mainboard with a lot of Glue !
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