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=== F256K or F256Jr === {| class="wikitable" |+ Group 0 |- ! Bit !! Name !! Purpose |- | 0x01 || INT_VKY_SOF || TinyVicky Start Of Frame interrupt |- | 0x02 || INT_VKY_SOL || TinyVicky Start Of Line interrupt |- | 0x04 || INT_PS2_KBD || PS/2 keyboard event |- | 0x08 || INT_PS2_MOUSE || PS/2 mouse event |- | 0x10 || INT_TIMER_0 || TIMER0 has reached its target value |- | 0x20 || INT_TIMER_1 || TIMER1 has reached its target value |- | 0x40 || RESERVED|| |- | 0x80 || Cartridge || Interrupt asserted by the cartidge |} {| class="wikitable" |+ Group 1 |- ! Bit !! Name !! Purpose |- | 0x01 || INT_UART || The UART is ready to receive or send data |- | 0x02 || RESERVED|| |- | 0x04 || RESERVED|| |- | 0x08 || RESERVED|| |- | 0x10 || INT_RTC || Event from the real time clock chip |- | 0x20 || INT_VIA0 || Event from the 65C22 VIA chip |- | 0x40 || INT_VIA1 || F256k Only: Local keyboard |- | 0x80 || INT_SDC_INS || User has inserted an SD card |} {| class="wikitable" |+ Group 2 |- ! Bit !! Name !! Purpose |- | 0x01 || IEC_DATA_i || IEC Data In |- | 0x02 || IEC_CLK_i || IEC Clock In |- | 0x04 || IEC_ATN_i || IEC ATN In |- | 0x08 || IEC_SREQ_i || IEC SREQ In |- | 0x10 || RESERVED|| |- | 0x20 || RESERVED|| |- | 0x40 || RESERVED|| |- | 0x80 || RESERVED|| |}
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