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dianziqin
- 8233,8253In accordance with the note to set the frequency and 8253 timer / counter of delay time. 8253 s CLK0 then 1MHz clock, GATE0 then 5 V, OUT0 then 8255 the PA0, J1 next speaker, programming the computer as the number keys 1,2,3,4,5,6,7 flower b