Tigger C: a file system on 6502 for I2C serial EEPROMs

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Tigger C generates efficient code for the 6502: fast and compact. Tigger C is written in Hopper and takes advantage of the Hopper 6502 Assembly toolchain.
This is a walkthrough of the implementation of a small file system for serial I2C EEPROMs like the one on the Hopper 6502 SBC.
Tigger C string and file library documentation on GitHub:
github.com/sillycowvalley/Hop...
64K Serial EEPROM file system overview:
github.com/sillycowvalley/Hop...
Oscar 64 compiler on GitHub:
github.com/drmortalwombat/osc...

Опубликовано:

29 июн 2024

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Комментарии : 8

@DrMortalWombat 5 дней назад

Great progress there. I tested the Sieve benchmark with Oscar64 on a C64 and got 12.5 seconds - so there may still be some easy gains for your compiler.

@biggertigger 5 дней назад

Nice. 1.023 MHz version, I presume. Out of interest, can you share the C code? Here is my version: gist.github.com/sillycowvalley/37afedf1cb7105e70ad7b51ce7cb8105

@DrMortalWombat 5 дней назад

@@biggertigger This is the version I have based my test on, just hammering it into C shape with printfs, [] and clock_t. It is a PAL C64 running at 0.985MHZ. Without badlines and at 1MHZ we would be at around 11.4 seconds.

@biggertigger 5 дней назад

That's pretty darn impressive!

@DrMortalWombat 5 дней назад

@@biggertigger You made the perfect comment at the three minute mark. The extrem disparity of modern compilers and systems and the potential code size of the target system allow for an amount of optimization that would not be possible in a reasonable amount of code and time when compiling on and to systems of comparable power. Oscar64 can easily consume gigabytes of RAM when compiling larger cartridge based games.

@biggertigger 5 дней назад

Can you share the disassembly for your version of main() for Sieve?