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Author Topic: A600 8Mb fast expansion  (Read 33381 times)

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Offline alexh

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Re: A600 8Mb fast expansion
« Reply #59 on: December 29, 2007, 05:28:36 PM »
Why does anyone care about sockets and SIMMS etc. if the boards come fully populated with 8Mbytes soldered down and a jumper?
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Offline rkauer

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Re: A600 8Mb fast expansion
« Reply #60 on: December 29, 2007, 05:44:32 PM »
Quote

alexh wrote:
Why does anyone care about sockets and SIMMS etc. if the boards come fully populated with 8Mbytes soldered down and a jumper?


 Because not every SIMM have the same chips on it. With using traces to solder your own SIMM (or a socket) you'll be able to put any SIMM you like.

 A board with traces to directly solder memory chips make that board exclusive to just one type of chip memory model.

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Offline rkauer

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Re: A600 8Mb fast expansion
« Reply #61 on: January 01, 2008, 09:34:12 PM »
 :bump:
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Offline Crumb

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Re: A600 8Mb fast expansion
« Reply #62 on: January 02, 2008, 11:38:27 AM »
You mean like Jens showed in this photo and this , right?detail of the screw. It would be definitely a good idea for the board layout. You'll have to move the HD to other part of the case but it sounds definitely as a good idea.
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Offline alexh

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Re: A600 8Mb fast expansion
« Reply #63 on: January 02, 2008, 02:13:24 PM »
Quote

rkauer wrote:
Because not every SIMM have the same chips on it.

Did you read what I put? What does that matter if they are sold with the memory already populated?
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Offline rkauer

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Re: A600 8Mb fast expansion
« Reply #64 on: January 02, 2008, 09:38:08 PM »
Quote

rkauer wrote:
Because not every SIMM have the same chips on it.


Quote

alexh wrote:
Did you read what I put? What does that matter if they are sold with the memory already populated?


 I mentioned it because maybe the board could be sent without any chips (bare board).
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Offline rkauer

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Re: A600 8Mb fast expansion
« Reply #65 on: January 05, 2008, 01:44:26 AM »
:bump:
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Offline rkauer

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Re: A600 8Mb fast expansion
« Reply #66 on: January 08, 2008, 08:19:16 AM »
:bump: again!

 Does anybody does how I reach LordV? I need to ask him some other questions, but he not answer the PM...
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Offline alexh

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Re: A600 8Mb fast expansion
« Reply #67 on: January 08, 2008, 09:15:08 AM »
Quote

rkauer wrote:
I mentioned it because maybe the board could be sent without any chips (bare board).

I think the advantages of the seller to populate the board to 8Mbyte before shipping outweigh the disadvantages of designing the board to take a simm slot and then sourcing the simms.
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Offline rkauer

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Re: A600 8Mb fast expansion
« Reply #68 on: January 08, 2008, 08:05:08 PM »
Quote

alexh wrote:
I think the advantages of the seller to populate the board to 8Mbyte before shipping outweigh the disadvantages of designing the board to take a simm slot and then sourcing the simms.


 Maybe this is easy to do in Europe and USA, but here, in "Cucarachaland" we have a major plague: brazilian customs(!).  The not only put a "little" tax over it (107% of costs, including shipment), but sometimes they simply STOPS the imports!

 I prefer to buy a blank board and scavenge a SIMM or (a little better) solder a SIMM directly to the bareboard.
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Offline lordvTopic starter

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Re: A600 8Mb fast expansion
« Reply #69 on: January 12, 2008, 06:58:20 PM »
I'm sorry for not coming here for a long period...

Here is the release: http://lvd.nedopc.com/Projects/a600_8mb/
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Offline rkauer

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Re: A600 8Mb fast expansion
« Reply #70 on: January 12, 2008, 09:21:30 PM »
 Please, let me be the first person to congratulate you for the excellent idea and hard work.

 If you guess, I'm making a tutorial to the "A601 without RTC" (aka Tabajara 1.01).

 Keep the good work! :bow:

 And a comment: this make my banana dance! :banana:  :banana:  :banana:  :banana:  :banana:
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Offline taunusand

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Re: A600 8Mb fast expansion
« Reply #71 on: January 13, 2008, 01:34:06 AM »
Well done  :-)
Could be nice with 8mb fastram in my A600
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Offline lordvTopic starter

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Re: A600 8Mb fast expansion
« Reply #72 on: January 14, 2008, 02:41:38 PM »
Well, if any of you REALLY wanna order unpopulated PCB plus a programmed CPLD, PLEASE write to my email so that I can manage orders easier. Email could be found in the README.txt inside the archive.
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Offline alexh

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Re: A600 8Mb fast expansion
« Reply #73 on: January 14, 2008, 02:44:25 PM »
I'd like to order a board populated to 4Mbytes ;-)
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Offline Colani1200

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Re: A600 8Mb fast expansion
« Reply #74 from previous page: January 14, 2008, 02:58:07 PM »
Great stuff. How much are they populated with 4MB?
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