NP-41 Emulator (may be)
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04-12-2016, 01:47 PM
Post: #217
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RE: NP-41 Emulator (may be)
ROM Loading
There are 20K bytes flash reserved for 4 banks of 4K (10bits) "pages". The loading hardware and tools is the same as bootloader usage. I.e. binary transfer capable terminal program and a usb-serial adaptor. I had only tried w/ "realterm". I am loading *.rom raw binary rom files. NOT *.mod. I had only tried a MATH-1C and a PHYSICS ROM. 1. connect unit to PC (similar to bootloading procedure) but without press-and-hold any key. 2. you would see the normal setup menu on the unit. 3. start realterm and connect to the appropriate serial port, again 9600,N,8,1. 4. press any key to get the menu. the pages 1, 2, 3, 4 in the menu corresponds to page 8, 9, a, b in the memory system (I think). 5. erase the appropriate page(s) by pressing the capital A, B, C or D. 6. load rom to a page by pressing the keys 1, 2, 3, or 4. * 4k ROM files are of 8K byte size, NP41S will compress it into 5K bytes during transfer. 7. remove connection after done. I am still not very familiar w/ the ROMs. I can load my 2 ROMs and run the functions, also they show up on 'CAT 2'. I do not know the relationship / importance to load to specific pages, etc. So this is still experimental. I am also not sure if the unit should accept ROM or MOD files. It seems MOD files have additional information that may benefit. Next I am preparing the next prototype unit to go to Etienne. The new all white PCB are done and I hope to received them in 20 days. My next priority is to develop a way to save and load the RAM space, i.e. user program steps and register contents. There are still odds and ends like the "TONE" command frequency and behaviour, CV ROM time functions and such and the longer term. |
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