WLA DX is yet another macro assembler that can program the GB-Z80, Z80, 6502, 65c02, 6510, 65816, HuC6280, and SPC-700 CPUs. Included in the package there is a GB-Z80 disassembler and few converters. WLA DX was initially programmed to compile ROM images for Gameboy, but nowadays it can also patch existing ROM images with code, and even compile program files and ROM files for other CPUs like the NES-6502, C64-6510, and SNES's SPC-700.
License: GNU General Public License (GPL)
Changes:
This version fixes some small bugs, adds filter macros to .db, .dw, and .incbin, and incorporates a Mersenne Twister. This release also changes the way label addresses are calculated inside branch opcodes' pending calculations.