Apple II User Manual
1965 ECC3 E0 00 CPX #0 ;IF SHIFT IS NOT ADV PAPER
1966 ECC5 F0 25 BEQ GETK10 ;NO SHIFT ,SO ADVPAPER
1967 ECC7 29 4F AND #$4F ;CONVRT TO "@"
1967 ECC7 29 4F AND #$4F ;CONVRT TO "@"
1968 ECC9 C9 1C GETK11 CMP #$1C ;SEE IF TOGGL PRIFLG (CONTRL PRI)
1969 ECCB D0 14 BNE GETK13
1969 ECCB D0 14 BNE GETK13
1970 ECCD 20 E1 E6 JSR PRITR ;GO TOGGLE FLG
1971 ECD0 A0 01 LDY #1 ;GET THE PTRS BACK 3 SPACES
1971 ECD0 A0 01 LDY #1 ;GET THE PTRS BACK 3 SPACES
1972 ECD2 B9 15 A4 GETK12 LDA CURPO2,Y
1973 ECD5 38 SEC
1973 ECD5 38 SEC
1974 ECD6 E9 03 SBC #3 ;BECAUSE "ON ,OFF" MSGS
1975 ECD8 99 15 A4 STA CURPO2,Y
1975 ECD8 99 15 A4 STA CURPO2,Y
1976 ECDB 88 DEY
1977 ECDC 10 F4 BPL GETK12
1977 ECDC 10 F4 BPL GETK12
1978 ECDE 4C 40 EC JMP GETKEY
1979 ECE1 C9 5C GETK13 CMP #BACKSLASH ;PRINT LINE COMMAND
1979 ECE1 C9 5C GETK13 CMP #BACKSLASH ;PRINT LINE COMMAND
1980 ECE3 D0 06 BNE GETK14
1981 ECE5 20 4A F0 JSR IPS0 ;PRINT WHATEVER IS IN BUFFER
1981 ECE5 20 4A F0 JSR IPS0 ;PRINT WHATEVER IS IN BUFFER
1982 ECE8 4C 40 EC JMP GETKEY
1983 ECEB 60 GETK14 RTS
1983 ECEB 60 GETK14 RTS
1984 ECEC 4C 38 EC GETK10 JMP GETKD0
1985 ECEF
1985 ECEF
1986 ECEF ;WAIT IF LAST KEY STILL DOWN (ROLLOVER)
1987 ECEF AD 82 A4 ROONEK LDA DRB2 ;SEE IF KEY STILL DOWN
1987 ECEF AD 82 A4 ROONEK LDA DRB2 ;SEE IF KEY STILL DOWN
1988 ECF2 C9 FF CMP #$FF
1989 ECF4 F0 0A BEQ ROO1 ;NO KEY AT ALL, CLR ROLLFL
1989 ECF4 F0 0A BEQ ROO1 ;NO KEY AT ALL, CLR ROLLFL
1990 ECF6 0D 7F A4 ORA ROLLFL ;ACCEPT ONLY LAST KEY
1991 ECF9 49 FF EOR #$FF ;STRBS ARE ZEROS TO INVER
1991 ECF9 49 FF EOR #$FF ;STRBS ARE ZEROS TO INVER
1992 ECFB D0 F2 BNE ROONEK
1993 ECFD 20 2A ED JSR DEBKEY ;CLR KMASK & DEBOUNCE RELEASE
1993 ECFD 20 2A ED JSR DEBKEY ;CLR KMASK & DEBOUNCE RELEASE
1994 ED00 A9 00 ROO1 LDA #0 ;CLR KMASK
1995 ED02 8D 2A A4 STA KMASK
1995 ED02 8D 2A A4 STA KMASK
1996 ED05 ;GO THRU KB ONCE AND RTN ,IF ANY
1997 ED05 ;KEY Y=ROW (1-8) & STBKEY=CLMN
1997 ED05 ;KEY Y=ROW (1-8) & STBKEY=CLMN
1998 ED05 ;IF NO KEY Y=0 ,STBKEY=$FF
1999 ED05 A9 7F ONEKEY LDA #$7F ;FIRST STROBE TO MSB
1999 ED05 A9 7F ONEKEY LDA #$7F ;FIRST STROBE TO MSB
2000 ED07 D0 02 BNE ONEK2 ;START AT ONEK2
2001 ED09 38 ONEK1 SEC ;ONLY ONE PULSE (ZERO)
2001 ED09 38 ONEK1 SEC ;ONLY ONE PULSE (ZERO)
2002 ED0A 6A ROR A ;SHIFT TO RIGHT
2003 ED0B 8D 80 A4 ONEK2 STA DRA2 ;OUTPUT CLMN STROBE
2003 ED0B 8D 80 A4 ONEK2 STA DRA2 ;OUTPUT CLMN STROBE
2004 ED0E 8D 2B A4 STA STBKEY ;SAVE IT
2005 ED11 A0 08 LDY #8 ;CHECK 8 ROWS
2005 ED11 A0 08 LDY #8 ;CHECK 8 ROWS
2006 ED13 AD 82 A4 LDA DRB2 ;ANY KEY ?
2007 ED16 0D 2A A4 ORA KMASK ;DISABLE ROW 1 IF CTRL OR SHIFT
2007 ED16 0D 2A A4 ORA KMASK ;DISABLE ROW 1 IF CTRL OR SHIFT
2008 ED19 8D 7F A4 STA ROLLFL ;SAVE WHICH KEY IT WAS
2009 ED1C 0A ONEK3 ASL A
2009 ED1C 0A ONEK3 ASL A
2010 ED1D 90 0A BCC ONEK4 ;JUMP IF KEY (ZERO)
2011 ED1F 88 DEY
2011 ED1F 88 DEY
2012 ED20 D0 FA BNE ONEK3
2013 ED22 AD 2B A4 LDA STBKEY
2013 ED22 AD 2B A4 LDA STBKEY
2014 ED25 C9 FF CMP #$FF ;LAST CLMN ?
2015 ED27 D0 E0 BNE ONEK1 ;NO ,DO NEXT CLMN
2015 ED27 D0 E0 BNE ONEK1 ;NO ,DO NEXT CLMN
2016 ED29 60 ONEK4 RTS
2017 ED2A
2017 ED2A
2018 ED2A A2 00 DEBKEY LDX #0 ;CLEAR CNTRL OR SHIFT
2019 ED2C A9 00 DEBK1 LDA #0 ;CLR KMASK
2019 ED2C A9 00 DEBK1 LDA #0 ;CLR KMASK
2020 ED2E 8D 2A A4 STA KMASK
2021 ED31 A9 88 LDA #DEBTIM ;DEBOUNCE TIME FOR KEYBOARD
2021 ED31 A9 88 LDA #DEBTIM ;DEBOUNCE TIME FOR KEYBOARD
2022 ED33 8D 08 A8 STA T2L
2023 ED36 A9 13 LDA #DEBTIM/256
2023 ED36 A9 13 LDA #DEBTIM/256
2024 ED38 4C 18 EC JMP DE1 ;WAIT FOR 5 MSEC
2025 ED3B
2025 ED3B
2026 ED3B ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;