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Thread: GBA1000 rev4 Build Log

  1. #531
    Amibayer! ajk's Avatar
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    @protek

    It's hard to say, I did it over several days a little bit at a time. A lot of it has to do with the hassle of dealing with so many different components and keeping everything sorted out. I'd say that if you have a good space to work in, all the components nicely organized (so you don't have to search for things) and so on, one weekend is enough to complete a board.

  2. #532
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    I have bought a blank PCB rev 4. I broke out my microscope and soldering rig. Let's see if I can still solder and build stuff! With that being said, I have some questions that I hope someone can answer.

    1. Is there anyone left that can either program all my chips or sell me programmed chips? Is there a link to the files that need to be programmed and is there a preferred programmer?
    2. I am thinking of running a 3.1 ROM. Will that work or should I stick the 2.04 ROM?
    3. Do I need to run a A1000 PS or will an ATX one work? I have read that you can convert an ATX PS but what I want is opinion. Is it a good idea and will it work?

    I am sure that I will have more questions. Thanks to everyone for putting this thread together.

  3. #533
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    The GALs can be programmed with all manner of inexpensive programmers so they should not be a problem. Similarly there are lots of Lattice ISP programmers (or clones of them) available on eBay, although I can't recommend any one in particular as I didn't program the ispLSI1024 myself (didn't have a suitable adapter and couldn't be bothered to make one ) I'm sure there are also people in the US who have built these and already have the programmers.

    3.1 works fine, that's what I'm running in mine.

    I elected to use an A1000 PSU since it's the best fit for the A1000 case. But pretty much any PSU can work, there is a jumper on the board for the Tick signal which is only present in the original PSU.

  4. #534
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    I bought most of my parts from the Mouser parts list the one of you fine gentlemen posted. I have a question about one of the parts. I ordered qty 100 of 623-2512067007Y3. This part is coming up as a 70 ohm 3A FB 1206 package. It looks like this was ordered for the 150 ohm FB that goes in multiple locations. Will this part work or should I order an actual 150ohm FB?

    https://www.mouser.com/ProductDetail...WgDrI9bthl5Q==

    The project also listed qty 6 of 810-ACH32C-100-T. Where do these go? I cannot locate them on any build sheet. Mistake in the project lsit on mouser??

    Thanks!
    Last edited by icepick94; 14th March 2018 at 02:23.

  5. #535
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    i found this in my old order to Mouser, 875-HI1206T500R-10

  6. #536
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    Does anyone have part numbers for R26, C59, C80, and Q1?
    R26 - 1K Trimmer Pot 4 pole
    C59 - 1-5 pF Trimmer 3 pole
    C80 - 5-40 pF Trimmer 3 pole
    Q1 - 32Khz Oscillator for the RTC. 2 pole.

    Thanks!

  7. #537
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    I am almost ready to fire this beast up. I just finished soldering the 16 ram chips onto the board. Its looking sexy!!

    I have figured out how to program my GAL chips. The issue now is the lattice. I can make the adapter but my MiniPro programming software does not have a template for this chip. Anyone have a recommendation of what software or what template to use for programming the lattice chip?

    Anyone?
    Last edited by icepick94; 6th April 2018 at 05:27.

  8. #538
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    Click image for larger version. 

Name:	GBA1000-PIC.jpg 
Views:	26 
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ID:	134007Getting there!! Getting close to firing it up!

  9. #539
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    Nice. Did you manage to get the ispLSI1024 programmed?
    Amiga 1000, GBA 1000, BBC Micro, ZX80 - see my blog at http://bootsiescomputers.com

  10. #540
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    Hi Icepick, where did you get the missing parts ?

    I am also searching for the sockel PGA128

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