archive.worldofdragon.org

looking at even older issues, I have found this one related to RAM upgrade project for the Dragon ...
- 1986 03 - Issue 19 article upgrading the Dragon by Bob Hall
cheers!

There is a fourth and final article in the next issue. I was hoping to find some information about the changes Bob made to the actual motherboard(s) but all the discussion seems to concentrate on how the MMU works. Nevertheless, really quite fascinating. Hello, I haven't found anything related to R...

Hello Jim, I had found some articles related to these RAM upgrades with MMU by Bob Hall in the magazines DRAGON UPDATE You could download them from this link https://archive.worldofdragon.org/browse/?downloads/Magazines/Dragon%20Update If I am not wrong, the issues concerned are: - 1987 Nrs 10-11-12...

I think mine is the french version of the Financial Planner + Memory . Interestingly enough, the rom that looks definitely equivalent to Budget Prévisionnel is the one from Cash Planner, which does not appear in the price list, or it appears as Financial Planner instead. Anyway, we might asume that...

Do any of the other Farmfax/Argo apps require this RAM cartridge? I am attaching here a doc that shows the FarmFax modules that could be bought back then with memory included!! Mine is Dairy Ration Formulation + Memory robcfg could tell us what model is the one he has ... there were NINE different ...

The program on the cartridge rom, copies the contents into the Basic memory area and the RUNs the program, so after that the cartridge rom is useless and can be swapped with the cartridge ram. I don't have any other cartridge and I don't know if the one that Pere has been dumped. Hi Robert, no, I h...

Hi Robert,
I attach here some images related to the FarmFax memory module I have
The zip contains the big files downloaded from my phone.
I hope that is better than reducing them to be shown on screen here
cheers!

well, after looking at the datasheet for the SRAM chips it seems that any value over 2V would be enough for data retention
So the value 3,6V must be the correct one.
Thanks one more time!

thanks for this info, Robert But I am afraid that the FarmFax board (not the french one) was not exactly the same. I attach here an image showing the battery that is not round as the one shown in your image. Keeping into account that the SRAM and ROM in that module work at +5V I was hoping that the ...

Hello,
Does anybody remember what kind of battery should be soldered on the FARMFAX module 16K RAM-ROM?
I remember it was something like 4,8V but I am not sure about that ...
Thanks beforehand!