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@ -58,10 +58,27 @@ An NES assembler for the 6502 microprocessor written in Ruby
There is an example file included (shown below) that is a modified port of There is an example file included (shown below) that is a modified port of
the NES101 tutorial by Michael Martin. the NES101 tutorial by Michael Martin.
# MIDI converter
Included in the utils/midi directory is a my first version of a MIDI
to NES music converter, which is composed of a Ruby script backed
by a C++ program I wrote to parse MIDI files into YAML data.
At present, it can convert a MIDI file to a binary stream of values
that, when written to the APU in your 60hz VBlank, can be played
by the included sound driver code.
The idea is to be able to compose music for the NES using your
favourite digital audio workstation in MIDI, and be able to convert
the square, triangle, and noise sequences to something playable
on the NES.
![Scrolling NES Demo](github_images/assembler_demo.png) ![Scrolling NES Demo](github_images/assembler_demo.png)
# Some new additions: # Some new additions:
- added .inc directive, to include other .asm files. - First version of Midi to NES music converter
- added .inc directive, to include other .asm files
- nes.asm library include file created, naming popular NES addresses - nes.asm library include file created, naming popular NES addresses
- C Style in memory structs using .scope and .space directives - C Style in memory structs using .scope and .space directives
- Explicit usage of zero page instructions with the zp suffix - Explicit usage of zero page instructions with the zp suffix