16-bit multiplication is stupidly slow on the 6502; so don't use it. Instead maintain a table of screen row addresses. This improves performance from 200ms per frame to 60ms.
16-bit multiplication is stupidly slow on the 6502; so don't use it. Instead
maintain a table of screen row addresses. This improves performance from 200ms
per frame to 60ms.

davidgiven/cowgol,davidgiven/cowgol