Cosmic Ark for the RP6502

[jasonfrowe]

Here's my port of Cosmic Ark for the RP6502. Feedback and comments are welcome, especially any bugs you run into.

https://github.com/jasonfrowe/RP6502-Cosmic-Arc

[rumbledethumps]

The truth behind the lights in the sky and cow mutilations. If you send it to the History channel as a pilot episode, they might give you a show.

Merging the L-analog and D-pad would be nice since the analog stick is hard to use 4-way. Taking it one step further, the analog-to-digital logic in the RP6502 is set up for 8-way, but this would greatly benefit from 4-way logic when shooting.

[jasonfrowe]

Good catch. I've been using a gamepad mapper consistency with games and I forgot that I had my D-pad mapped to the analogue sticks.

Code updates:

1. linked D-pad and left analogue stick
2. Gated left analogue stick during meteor storm phase (so 8-way is fine when controlling the lander)

There seems to be a problem with the occasional hanging note with the OPL2 system. I might be sending too many register changes with the sound effects or overwhelming the Pico2. Not a problem with the FPGA version, but that hardware has a large FIFO. I'll report back when I have something that reliably demonstrates the issue.

Thanks for the feedback!

[rumbledethumps]

A quick check didn't turn up anything about stuck notes. I think you'd be getting other symptoms if it was a buffer overflow. Anyways, sounds like an easy fix when you can reproduce.