real-time clock - for personal computers

real-time clock... elektor april 1985 real-time clock . . . ...for personal computers Every home computer enthusiast wants to stay abreast of the time. And what is therefore more logical than adding a clock to your computer? Our real-time clock, based on a CMOS IC, guarantees that you always have the right time and date at your fingertips, or rather on your monitor. It has a back-up battery as protection against mains failure or computer failure and is suitable for use with 6502 and Z80 microprocessors. 4-48 More and more modern computers are provided with an internal clock which enables the monitor to display the correct date and time whenever required. This is, of course, not only useful if you want to know the time, but also with all sorts of games (keeping track of game periods, measuring reaction times, and so on), and more serious programs (to get an idea of the computing time in long calculations, for instance). This facility is normally not available in homeconstructed com...