REU for C-64 & C-128

Disk drives, Monitors, SuperCPU etc.
JimDrew
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Re: REU for C-64 & C-128

Post by JimDrew » Mon May 16, 2016 6:57 pm

motrucker wrote:Sorry for that little rant. All things considered, removing the name of "that" forum isn't all that bad, I guess. After all, they do deserve it. Humble, and sincere apology guys.

I still haven't heard anything about Jim Drew's REU project. He's as bad as Jim Brain about keeping us informed. :shock:
There is nothing to report. It's a list of "to do" projects. It fits under the 6510, so it doesn't tie up the cartridge port.



Nonefornow
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Re: REU for C-64 & C-128

Post by Nonefornow » Mon May 16, 2016 8:01 pm

So I have been testing the REU of the 1541U-II with my C128DCR and various flavors of GEOS. GEOS2.0 - GEOS2.1 - Wheels - MP3.
With the REU set for 16MB and in C64 mode all flavors of GEOS are working and recognizing the max memory allowed.


GEOS2.0 up to 512KB
GEOS2.1 up to 2048KB
Wheels up to 2MB
MP3 up to 4MB
04-30-16_1201.jpg
04-30-16_1220.jpg
With the REU set for 16MB and in C128 mode 40C none of the flavors of GEOS are working.
So I scaled down.

At 512KB. GEOS2.0 Pass
GEOS2.1 Pas
Wheels Fail
MP3 Fail

Same at 1MB except, as expected, GEOS2.0 recognizes only 512KB

Same at 2MB except, as expected, GEOS2.0 recognizes only 512KB.

I repeated the test in 80C mode.

At 512KB. same as 40C mode
At 1MB. same as 40C mode
At 2MB. GEOS2.0 recognizes 512KB
GEOS2.1 fails and gives the error:

System error near $9FB0.
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Sjaak
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Re: REU for C-64 & C-128

Post by Sjaak » Sat May 06, 2017 3:32 pm

eslapion wrote:
Thu Mar 17, 2016 3:25 pm
I already own the IP for a static RAM based REU. You guys are tempting me for a kickstater.

A lot of money, energy and time needs to be invested to adapt this IP to an FPGA or CPLD, create the PCB and build this thing.

Who's in?
I can offer PCB design and DFM (design for manufacturing) for the REU. I can route up to 100x160 4 layer (However I don't think more then 2 layers are required.

I love to have a REU for my SX64 !
Visit my page: http://SMDprutser.nl

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eslapion
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Re: REU for C-64 & C-128

Post by eslapion » Sat May 06, 2017 8:08 pm

Sjaak wrote:
Sat May 06, 2017 3:32 pm
I can offer PCB design and DFM (design for manufacturing) for the REU. I can route up to 100x160 4 layer (However I don't think more then 2 layers are required.

I love to have a REU for my SX64 !
I assume you mean 100x160mm. The offer is attractive but I am more or less in survival mode right now.
Wealth, like happiness, is never attained directly. It comes as a by-product of providing a useful service. -Harland D. Sanders

Sjaak
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Re: REU for C-64 & C-128

Post by Sjaak » Sun May 07, 2017 10:44 am

eslapion wrote:
Sat May 06, 2017 8:08 pm
Sjaak wrote:
Sat May 06, 2017 3:32 pm
I can offer PCB design and DFM (design for manufacturing) for the REU. I can route up to 100x160 4 layer (However I don't think more then 2 layers are required.

I love to have a REU for my SX64 !
I assume you mean 100x160mm. The offer is attractive but I am more or less in survival mode right now.
indeed 100x160mm. I later realized the topic was more then a year old.
Visit my page: http://SMDprutser.nl

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eslapion
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Re: REU for C-64 & C-128

Post by eslapion » Mon May 08, 2017 8:41 am

Sjaak wrote:
Sun May 07, 2017 10:44 am
indeed 100x160mm. I later realized the topic was more then a year old.
Just don't assume the project isn't on the backburner... I invested a LOT of money on this with no result yet.

I sure would like it to come to fruition one day.
Wealth, like happiness, is never attained directly. It comes as a by-product of providing a useful service. -Harland D. Sanders

Sjaak
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Re: REU for C-64 & C-128

Post by Sjaak » Tue May 09, 2017 5:15 pm

eslapion wrote:
Mon May 08, 2017 8:41 am
Sjaak wrote:
Sun May 07, 2017 10:44 am
indeed 100x160mm. I later realized the topic was more then a year old.
Just don't assume the project isn't on the backburner... I invested a LOT of money on this with no result yet.

I sure would like it to come to fruition one day.
Me too. I hope soon. Feel free to contact for PCB design or prototyping
Visit my page: http://SMDprutser.nl

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eslapion
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Re: REU for C-64 & C-128

Post by eslapion » Thu May 11, 2017 1:41 am

What I really need right now is 6502 and VHDL coding. Good at that ?
Wealth, like happiness, is never attained directly. It comes as a by-product of providing a useful service. -Harland D. Sanders

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