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Line 153: === I/O Ports === The Datamaster has a rich set of Intel peripherals which consist of a 8251 USART, 8253 PIT, three 8255 PPI, 8257 DMA, 8259 PIC and ~~8279~~8275 CRTC. All of them, including other devices are accessed the following ports<ref name=":0" />: {\| class="wikitable"

IBM System/23 Datamaster: Difference between revisions