A Z80 machine language program to use the ZX81 as an audio frequency counter Authors Carol F. Milazzo Publication QZX Pub Details QZX v2 n11 Volume: 2 Issue: 11 Date October 1984 Pages Read the article See all articles from QZX v2 n11 Products Downloadable Media Related Articles Image Gallery Source Code Tags QZX Machine language programming TS 1000 Type-in program ZX81 People Carol F. Milazzo (KP4MD)
