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Member Since 9 Mar 2005
OFFLINE Last Active Today, 9:58 AM

Topics I've Started

Cycle counting

Mon Oct 13, 2014 8:09 AM

I'd like to find out how many CPU cycles my deferred VBI is taking. Are there ways to do that semi-accurately on real hardware? Maybe by finding out where the raster is?


Also, I figure its possible on altirra, but I would also appreciate a clue or two on how to do that.

CL65 and .O65 format files

Mon Sep 15, 2014 10:46 AM

I know that the CA65/CL65 system can emit .o65 files ( the relocatable format object files ), but I am having some difficulty actually getting it to do so. Does anyone know offhand how to get the system to emit .o65 format files?

the eternal question

Tue Jul 22, 2014 7:05 AM

Also known as 'how many colors can I get if I....'


I'm looking to get back into a little game programming in assembler. I'd like to have a fairly high resolution, so something based on mode E maybe. I plan on having pixel addressable movement ( ie, smooth ) of a small number of software sprites, so the text modes are probably out. If I use graphics E and overlay player/missile, is it feasible to get a few more sprite colors that way? I'm not looking for anything super fantastic, just a few more colors, no flicker, and reasonable resolution. Thanks in advance for any suggestions.

Squink - make your own boards

Tue Jul 22, 2014 6:51 AM

This article is very interesting.



cycles for a page copy

Sat Mar 22, 2014 2:52 PM

How many cycles would a typical 1 page copy consume? I am guessing around 8*256, but am not sure.