On Thursday, July 29, 2021 at 3:01:56 AM UTC-4,
fridtjof.ma...@gmail.com wrote:
There is a bit of a lull in my am9511 and apu projects.
So, I was thinking about graphics. Old-school. UTF-8 has
2x2 sub-cell graphic characters. I used those, along with
character set data from the 1974 Poptronics Scopewriter
to make a program that displays HELLO, in 2x2 graphics
using the Scopewriter font.
Written in MBASIC. For fun. takes a minute or two on
my Altair-Duino
https://github.com/ratboy666/halfg
Added MWC (Mark Williams Company) translations to XYBASIC.
Included xycmpfp.com, the MWC XYBASIC interpreter with software
floating point to run the translations. xy1.bas is a direct translation, improved
in xy2.bas and xy3.bas. xy3.bas uses 1/4 (one fourth) of the data storage. Speed can still be improved (by quite a bit) -- hint: (1) move DATA to below the code. and (2) avoid string concatenation to build output lines are the first two "easy and cheap" optimizations.
Fred
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