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| How to even start routing this? |
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| 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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