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Default I/O Port Summary

6 bytes added, 16 February
/* I/O Port Allocation Rules */
| [[CRTC]] || Read/Write || - || 0 || - || - || - || - || r1 || r0 || - || - || - || - || - || - || - || -
|-
| [[Upper ROM Bank Number|Upper ROM select]] || Write only || - || - || 0 || - || - || - || - || - || - || - || - || - || - || - || - || -
|-
| [[Printer Port]] || Write only || - || - || - || 0 || - || - || - || - || - || - || - || - || - || - || - || -
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