ZX Spectrum 128: Difference between revisions

ZX Spectrum 128 (view source)

552 bytes added , 19 November 2012

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651

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 |}
 <!-- end of memory map -->
+Paging is controlled by performing I/O writes to ports 0x7ffd.
+The bits are described in the table below:
+{| class="wikitable" style="text-align: center;"
+|-
+! rowspan="2" style="width: 5em;" | Port
+! colspan="8" | Bit
+|-
+! style="width: 5em;" | 7
+! style="width: 5em;" | 6
+! style="width: 5em;" | 5
+! style="width: 5em;" | 4
+! style="width: 5em;" | 3
+! style="width: 5em;" | 2
+! style="width: 5em;" | 1
+! style="width: 5em;" | 0
+|- style="height: 5em;"
+! 0x7ffd
+| || || Disable Paging || ROM low || Active Screen || colspan="3" | RAM Bank
+|}
 ==Keypad==