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Subject: Re: What do you think of this?
From: Joaquim Carvalho (jdc_at_x64.com)
Date: 2003-02-27


On Thu, 2003-02-27 at 13:07, Björn Stenberg wrote:
> Is this Asteriods game real or was it just a screen test?
>
> It looks awesome, and I think a lot of people would be very happy to have it in their Archos.

It's just a screen test.
I checked the rockbox line drawing speed and it's fast enough
for asteroids. The LCD is rather small but ship-centered panning
with configurable zooming would make it look nice and easy to
play.
As to the game there are 2 options:
- program it in C (experienced players will not like it if it's
  not exactly the same as the real arcade machine)
- write_a/use_an_open_source 6502 emulator. The 6502 was the first
  and only real RISC I knew (other RISCs I know have a more complex
  instruction set than most CISCs) The 6502 in Asteroids runs at
  the astonishing speed of 1.5MHz and does most instructions in 1
  clock cycle. The emulator should be easy and a pleasure to write.
  Optimized C code is probably fast enough. Rom size is 2Kb so
  on-the-fly re-compilation is also an option.
  Would an emulator thing be acceptable in Rockbox? The (illegal)
  ROM file shouldn't be included but could be loaded at runtime.
Is it possible to change the DSP decoder so it mixes an analogue
sound stream with the decoded MP3?
Joaquim



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