Labels:digital display OCR: Timer Output To snaaka circuitry From bio port 31h Timer To DMA Output channe (usad volts DRAM rofresh makos the timers run non-stop ar the modes ILOM discuss) Timer FQ0 (harcwari Output interrupt 0 the timer interrupt) 8253 Timer Chip FIGURE 2.1 The configuration of the 8253 timer chip in the PC Of the 8253's three timers, only timer wired so that gate input is under program control the gate inputs of timers and are always enabled, so there no documerted wary t0 either timer 0 or timer to stop counting Only timer connected so that it is capable of generating an interrupt circuitn biaf Ourput refresh IL9M FIGURF
(.png)
