Labels:text | diagram | screenshot | parallel | line | black and white | receipt OCR: MIDI ACIA (6850) - B.43 L@_ 000000 S M S M T F T T e T a e 0 0 S T T 0 Location[s] Size Type Meaning Keyboard ACIA Control (when read) as follows: Interrupt Request Parity Error Receiver Overrun Framing Error Bit 7 Bit 0 Clear to Send Data Carrier Detect Transmitter Empty Receiver Full 0x00FFFC02 EB Keyboard ACIA Data MIDI ACIA (6850) 0x0OFFFC04 EB MIDI ACIA Control (see keyboard ACIA control register for details) 0x00FFFC06 EB MIDI ACIA Data Mega ST Real Time Clock ( RP5 C 15 ) 0x00FFFC20 OB Bank O: Seconds- Ones (0-9) Bank 1: Clock output frequency as follows: Value Meaning 0 Open-Collector "CLKOUT" 1 16384 Hz 2 1024 Hz 3 128 Hz 16 Hz 5 1 Hz 6 1/60 Hz Open-Collector "CLKOUT" 0x00FFFC22 OB Bank O: Seconds- Tens (0-5) Bank 1: Setting bit#0 will reset the seconds register to the O and, if the seconds register is currently between 30-59, increment the minutes register. 0x00FFFC24 OB Bank O: Minutes- Ones (0-9) Bank 1: Alarm Minutes- Ones (0-9) 0x00FFFC26 OR Bank O: Minutes-Tens (0-5) Bank 1: Alarm Minutes- Tens (0-5)
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