Matthias Wehrli
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Module list:
Ok, I will not publish all my HP-41 modules here in a table cause it would be a very long list. I tried to complete a existing list of ROM / EPROM modules (thanks to Wilson Holes and Diego Diaz for their great work). I added XROM numbers, module size and label (also CAT2). You can download this .pdf File here. Please let me know, if you have additions or corrections and I will update the database, so that we'll get a nearly complete one.
I only want to tell you about three very special modules. All of them are free programmable. You only need image files of the ROM you wish to program. You can find a lot of them in the internet.
| ZEPROM |
Features
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Clonix / NoVRAM |
| Zengrange |
Manufactur
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Diego Diaz |
| programmable EPROM |
Technology
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modern PIC18LF252 Microcontroller |
| special burner with programmer software |
Programmer
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common serial port programmer |
low power usage
collectable item
high quality module
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Advantage
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Clonix: 6x4k pages or 5x4k + RAM
NoVRAM: 6x4k pages plus 16k RAM
easy programming
low price
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only 4x4ks page
rare item (especially the burner)
high price |
Disadvantage
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programming needs a PC (no notebook)
high power usage (9-13,5 mA)
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Module: ~ 250 Euro
Burner: ??? |
Price
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Module: 120 / 150 Euro
Adapter: 10 Euro
Programmer: 20 Euro |
| All items are very useful and a cheap alternative to the much more expensive RAMboxes. If you are no collector and you just want to use your old HP-41, I would recommend to the modern Clonix / NoVRAM, cause it´s cheaper and you have more pages for programming. |
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