So, you want to optimize your assembler code a little bit ?
Here are some "generic" ways to speed up / shorten your Z80 progs a little bit:
- CP 0 -> OR A
- LD A,0 -> XOR A
See also:
http://shiar.nl/calc/z80/optimize
http://wikiti.brandonw.net/index.php?title=Z80_Optimization
http://z80-heaven.wikidot.com/optimization
http://www.ticalc.org/archives/files/fileinfo/285/28502.html