Tags: Aejs

Opcode patterns 70% finished

genlut.py is really filling out. It generates the LUT for all 68k opcodes (68000 only), and I’m about 70% done. 77 down, 34 to go. The OPCODES dict defines the first two bytes of each opcode, both static bits and operands. The operand strings act as keys into the PATTERNS struct,…
thumbnail for 'Opcode patterns 70% finished'


Decoding is easy. Decoding requires a lot of typing. (I am starting to believe this is true of ever aspect of interpreted emulation…) For the AEJS decoder, I am creating a look-up table with every possible pattern for each instruction. It was my first idea, but I initially discar…
thumbnail for 'LUT'

Introducing AEJS

Introducing AEJS, an Amiga emulator written in JavaScript. Wait, wording it like that makes it sound like it’s finished. It isn’t. It won’t be for a long time. AEJS is just a hobby, and will never hold a candle to UAE. Why the Amiga? Given that this is my first emulator, it would…
thumbnail for 'Introducing AEJS'