NP-41 Emulator (may be)
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01-28-2016, 08:26 PM
(This post was last modified: 01-28-2016 10:26 PM by rprosperi.)
Post: #146
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RE: NP-41 Emulator (may be)
(01-28-2016 06:55 PM)Chris Chung Wrote: After looking into the peripheral and ROM extensions in more detail, I can see the current hardware is not adequate to support them. Anyway, my objective for this design has not change. It should stay being simple and easy to build. Altering the design will take more time than I like, as I need to know the stuffs (ROM / HP-IL, etc) in order to implement them. Thanks for taking a look at the expandability possibilities; IMHO well worth the time to check so I appreciate it! 2 x 4K ROMs is certainly far better than none, especially since folks can pick their own ROMs. Most of the modern ROMs in use need more than this, since many rely on Angel's LIB4 to be present (thus taking up one ROM already) and they also use bank-switching, again size-prohibitive. But in truth, most folks using these ROMs also most likely will prefer using original 41C h/w. But it would allow use of the vast majority of the original Application ROMs, both from HP and many 3rd parties, which is probably hundreds of ROMs in total. Bottom line: Heck Yes, very useful in most cases!! I don't recall the 41 version you are proposing - 41C, 41CV or 41CX (obviously preferred, but requires a crystal for the clock, etc.)? We will stay tuned, and thanks for your considerate approach to developing these cool toys Chris! --Bob Prosperi |
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