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The last version of RASM is v0.81 (5th April 2018) :
- added special maxam priorities for parenthesis and boolean operators
The source code of 1Kusai is available.
So, the idea was to fit Hokusai's The Great Wave off Kanagawa in 1K.
I worked from an SVG file and removed a lot of details until it would fit the allocated space (packed with zx7). Eventually it ended up too small after some late minute changes to the code which improved the compression. Oh well.
The SVG was converted to bezier curves using NanoSVG, then a custom Lua script to convert the usual bezier curves definitions into a form more suitable for computation. Normally a Bezier curve is defined by X and Y equations which look like this :
x = A(1-t)³+3B(1-t)²t+3C(1-t)t²+Dt³
We can rewrite this as : Z + t(Y + t(X + Wt))
Z = A
Y = 3B
X = 3C - 6B
W = D - 3C + 3B - A
So in this form we need only 3 multiplications.
The computations are done using CPC firmware which provides neat floating point math support. I compute 256 points along each curve (this could be adjusted to less points for faster drawing, at the cost of slightly less smooth curves) and draw lines between them. Then the system FILL routine is used to fill the closed shapes.
The sound of waves and thunder you can hear is just the Y or X coordinate (I don't remember, whichever sounded best) sent to the AY noise register (again using the CPC firmware, because this is the most space efficient way). I tried to write some music using the free bytes left but did not manage to do anything very convincing. Next time I'll try to spend more effort on the sound side.
April Fool ALERT, April Fool ALERT
I have received the same email than Markus Hohmann as he announced it on Facebook.
So Alan Michael Sugar is asking to remove all ROMs of the Amstrad CPC firmware for a copyright reason as an Amstrad CPC mini will see the light later this year.
I was waiting for such a beast, but I didnt think about possible consequences. Though I will respect what he is asking as I have never wanted to put illegal programs on this web site.
A new version of CPChessNet (v1.7b) by Joseman is available to play chess on internet with your Amstrad CPC and the wifi card M4 Board (by Duke).