Electronics > Projects, Designs, and Technical Stuff
How to even start routing this?
Joanna_H:
You know the world has become a little scary when you can fit the majority of an old school 16bit processor into about 2% of a low spec FGPA.......
LCMXO2-640UHC-4TG144C. had to choose the 640 as the lower one doesn't have enough I/O pins :/
I'll post no more on this in this thread as I've gone way of topic now.
SiliconWizard:
--- Quote from: Joanna_H on August 06, 2019, 05:44:51 pm ---You know the world has become a little scary when you can fit the majority of an old school 16bit processor into about 2% of a low spec FGPA.......
--- End quote ---
Not surprised. ;D
You did that pretty fast!
PlainName:
Just like to say that a good habit to develop is to keep pin1 in the same orientation for all chips. Sometimes it's not practical but in that case keeping complete groups the same is a reasonable fallback. Similarly, diodes all point the same way (for those all pointing up/down or left/right). The reasoning is to prevent assembly cockups.
Joanna_H:
Woops, just noticed I was up all night messing with this.. LOL
Still, have some things now working.
A simple test of a NOP, JMP (in page, LSB only) and LJMP (anywhere in memory, uses both MSB and LSB) was fun. But starting to eat up those resources as I add more stuff :D
At least the microcode isn't on the FPGA, seperate EEPROM to allow for easy program/reprogram of that little part. Both memory and eeprom simulated in the testing to see how it's going :D
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