Gigatron Hackers

To get real world load to todays computers I modified sieve to "toughsieve"

This is little bit OT, but did everybody knew that Cray 1 supercomputer 1970's used only ICs and had 200 000 gates. 1990's they started to use microprocessors. Thanks to sieve now we can compare all the machines. Cray 1 supercomputer(Fortran)-Sieve-benchmark 0.110 seconds. Thats 190 times faster tha...

Also, did you use the same compilation option -map=64k,hionly as https://github.com/lb3361/gigatron-lcc/blob/master/stuff/sieve/Makefile ? That shouldn't impact the ratios but make the code a bit faster by avoiding long jumps between screen holes.. I only changed -rom=dev, otherwise it was compiled...

Just run all the different sieve versions. Sieve0: 41.1 seconds normal screen mode Sieve0: 28.67 seconds fast screen mode <- Ratio 2.05 Sieve1: 39.22 seconds normal screen mode Sieve1: 27.57 seconds fast screen mode <- Ratio 1.97 Sieve2: 29.72 seconds normal screen mode Sieve2: 20.87 seconds fast sc...

I am considering of updating GigatronTTL 64K DEVROM with latest DEVROM, PluggyReloaded firmware, GLCC compiler and compiling all programs again. Is this good spot to do it or is there some unfinished work there? Last update was 14.2.2022 EDIT: I did update on 1.5.2022. Everything works smoohtly as b...

Video banking Because we do not rely on the Gigatron CPU to read the pixel values, we no longer have to place the video buffer in the current address space of the CPU. We can displace it into another bank that we only access when we want to write something to the screen. This frees almost all of th...

Time to do 64K RAM upgrade mod. I did it from the top of chip.

Now that I have 64K RAM, what are the top applications benefitting from more memory?

btw. I've tested most of the programs marked _64k_

Gigatron TTL 64K RAM expansion mod

I like this approach. The Mandelbrot_DEVROM.gt1 is really fast. In the past there was FractInt for 8-bit machines, so this trick and integer calcuation is way to go. My floating point fractals are only the basic code and most accurate AND very slow.