When I got into retrocomputing a few years ago, I also did this. Works great with TRS-80 semigraphic characters. First, I wrote it in C with a Z80 c compiler. T

When I got into retrocomputing a few years ago, I also did this. Works great with TRS-80 semigraphic characters. First, I wrote it in C with a Z80 c compiler. The, I wrote it again in assembly and it was much faster! Amazing!