Commander X16

I feel like I need to update the couple programs I updated.   But being away from the forums during all the flurry of recent updates, I seem to have missed a lot.  So far, I know SCREEN has changed in terms of what modes are available and how they default.  Also, TI$ seems to be broken or changed i...

Ed, Completely unnecessary as the program stands now.... you're right!    I think that was probably a leftover from playing with an alternative way of doing the IF/THEN branch I had toyed with briefly and I just never pulled it back out; and then got it stuck in my head that it was something I had ...

Opaque,   Try this... 0 ti$="000000"<br /> 1 dimx,i,y,e,c:l=-0.001:m=150:n=80:dim m(255),d(141):graphic1,1:a=cos(.785)<br /> 2 fori=1to141:x=i-70:d(i)=x*x:next<br /> 3 foro=1tomstep5:e=a*o:i=o-70:c=i*i:fori=1to141:x=i+e:y=e+n*exp(l*(c+d(i)))<br /> 4 ify>=m(x)thenm(x)=y:draw1,x,abs(y-m):next:next:go...

Its not the "drawing speed" per se  -- VERA is extremely fast, and the BASIC PSET command is already a pretty fast pipe into VERA's api.   No, its the math, parsing, and variable stores/fetches that are the speed road blocks here. The "EXP" function is especially nasty.   Implementing a polynomial ...

<strong>FRACTAL BOOGALOO, continued...</strong> Sorry for the delay, but I suddenly have a lot more personal things going on unexpectedly.   I will write this up with some detail later, but it will most probably be several weeks at the very least.  Since I have a few minutes now, I wanted to at lea...

I seem to remember that The old C64 'type-in' word processor called Speedscript had something neat in the source code, which it treated as akin to the "ON GOTO" in BASIC, only implemented in assembler.   It used a command table to manage a count (e.g., found the key pressed on the 5th try so '5' is...

<strong>Fractal Boogaloo writeup:     </strong> <strong>A.  Cogitating and understanding. </strong>                    NOTE:    I was going to stick in an aside about floating point precision here, but I think it will fit better later in the write up when I hopefully get to the end of the optimizat...

I generally think the community is the people, not the window dressing.   But... It seems to me the site will survive under either forum software platform IF (and only) the project itself gets off the dime at some reasonable point in the future.   A lot of that depends on how much static the X16 ec...

<strong>OPTIMIZING A SIMPLE PROGRAM PART TWO: 'FRACTAL BOOGALOO....'</strong> This is a continuation of a discussion started in Software Library chat by SlithyMatt when he uploaded his neat BASIC routine that outputs an extreme zoom-in onto a portion of the Mandelbrot fractal, with a 256 color disp...

Hey, folks.  I haven't had time to play with X16 stuff the last few months for a variety of reasons.    Better late than never, I am finally getting around to trying my hand at optimizing this neat little demo.   I have Matt's original version running now to see exactly how long it takes for a full...