The decompression code written in 65c816. The code is originally written for SuperFamicom homebrew, but it should be able to be used for other devices with the 65c816 processor.

• WLA-DX

• You can define UNSAFE when assembling the code to reduce the code size and make it a little faster, with the restriction where you must locate a sequence of the deflate data within the same bank.
• The code is executed on RAM to self-modify the code for optimization. The inflate routine requires the 0x5DB bytes with UNSAFE, and 0x68B without.
• It requires 0x46A bytes for variables. These must be located in the same bank as the inflate routine on RAM.
• It requires $00-$13 (included) for variables in Direct Page. You can set the arbitrary DP register value before calling the inflate routine.
• The interruption may occur during the decompression if handled appropriately.
• As the inflate routine is located on RAM, once you assemble the inflate.asm in /src directory, you can just include inflate.ram.bin into your source code with your favourite assembler.

• Set the RAM address where you want to locate inflate routine in /src/inflate.inc
• Assemble /src/inflate.asm, which outputs inflate.ram.bin
• Include inflate.ram.bin in the your source code and write the code to copy the binary onto the same RAM address where you first configured.
• Include deflated-data decompressed by zopfli with the --deflate option
• Call JSL Inflate with the condition:
  • A : source bank << 8 | destination bank
  • X : source address
  • Y : destination address

The SuperFamicom homebrew ROM is provided as an example. To assemble, run the following:

cd src && make
cd ../example && make