QZX v2 n11 Date: October 1984 Volume: 2 Issue: 11 See all issues of QZX Articles Show all ZX80 MicroAce ZX81 TS 1000 TS 1500 TS 2000 TS 2048 TS 2068 TC 2068 ZX Spectrum QL Z88 TS 2050 TS 2040 Reference Type-in program Downloadable Hardware project Hardware review Software review Book review Tutorial A Z80 machine language program to use the ZX81 as an audio frequency counterZX81 TS 1000 Type-in program
