First boot…. FAIL!

Right… After a few more mistakes, i finally got all the wires connected and was happy i had double checked them all 🙂  Sooo Lets boot it up.  Guess what, I got a black screen 🙁  Oh well time to debug it...

Things dont always go to plan

Well that didnt go to plan… With a few of the things in my head i wanted to test replacing internal roms with external ones.  The idea was simple, i created a very basic rom that just displayed a mode 4 screen on the Sam Coupe.  I stuck the rom on a prototyping...

Video Address Generation

Just a quick post about the idea in my head for the video address generation.  I was looking to have some form of hardware scrolling ability on my system, i felt this was one of the greatest strengths on the Amiga.  Several old computers just use the horizontal and...

Horizontal Blank Timing

Over the years I have spent time looking at computer design and cpu design.  I dream of building my own computer from scratch, not just buying parts and putting a pc together, using simple logic gates from the 74 series and designing it from the ground up. I read many...

Sprites and Masks

Im sure most people will be use to the idea of sprites and masks, but just incase ill quickly recap on the details of them before going into the trick im using for Dizzy.  A sprite is usually a chunk of memory representing the pixels for the graphic, you need to know...

OCD… Maybe

Having got a working version of the levels displaying, i needed to a) speed the drawing up and b) sort out the code to a more usable format. Sorting the code was mainly due to the fact i had thrown things together to test if it could all work.  Everything was put into...