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;.Z80
KEY_SCAN: XOR A
IN A,(0FEH)
OR 0E0H
INC A
RET Z
LD L,-8 ;INITIAL KEY VALUE
LD DE,0 ;INITIALISE DE - NO KEY, NO SHIFTS
LD BC,0FEFEH ;C-PORT ADRESS, D-COUNTER
KEY_LINE: IN A,(C) ;READ KEYBOARD
CPL
AND 1FH ;MASK FOR RESPONCE BITS
JR Z,KEY_DONE ;IF NO KEY PRESSED - DOWN
LD H,A ;HOLD VALUE TO H
LD A,L ;RESTORE INITIAL KEY VALUE
LP2: ADD A,8H ;REPEATEDLY SUBTRACT 8 FROM
SRL H ;THE PRESENTS KEY VALUE UNTIL A
JR NC,LP2 ;KEY-BIT IS FOUND
OR A
JR NZ,NO_CS
SET _K_CS,E
JR NO_DN
NO_CS: CP 0FH
JR NZ,NO_SS
SET _K_SS,E
JR NO_DN
NO_SS: LD D,A
NO_DN: INC H
DEC H
JR NZ,LP2 ;IF MORE THE ONE KEY PRESSED - PASS BACK
KEY_DONE: INC L ;KEY VALUE ADJUST FOR NEXT SCANNING LINE
RLC B ;NEXT KEYBOARD LINE
JR C,KEY_LINE ;REPEAT FOR ALL LINES
LD A,D ;FIRST KEY VALUE
OR E
RET
K_STA: DB 40H, 80H
K_ST1: DB 3,4,0BH,0CH,13H,14H,1BH,1CH,23H,24H ; CS
K_ST1S EQU $-K_ST1
K_ST2: DB 4,5,8,0CH,0DH,0EH,10H,14H,16H,17H,18H,1EH,1FH,20H,26H,27H ; SS
K_ST2S EQU $-K_ST2
K_STAS EQU $-K_STA
KEYBOARD_: DEC (IX-_K_5CNT)
RET P
LD (IX-_K_5CNT),0
CALL KEY_SCAN
CP (IX-_K_LAST)
JR Z,K_OLD
;----- TESTING FOR UNBALANCED EXTEND KEY
LD B,(IX-_K_BUF)
LD (IX-_K_BUF),-1
INC B
LD D,A ; SAVE FOR LATER
LD C,3FH
JR Z,K_NOBUF
DEC B
AND C ; KEY IN BUF
JR Z,K_ORED
XOR B
AND C
JR Z,K_ORED
LD A,B
AND C
JR Z,K_ORED
LD A,B
AND 0C0H
OR C
JR K_SBUF
K_ORED: LD A,B
OR D
JR K_NXT
K_NOBUF:LD A,(FLAG) ; MASK ALREADY SETED SHIFT'S BIT
CPL
OR C ; C STILL 3FH
AND D
LD HL,K_STA ; IT'S MAY BE UNBALANCED EXTEND KEY?
LD BC,K_STAS
CPIR
LD A,D
JR NZ,K_NXT ; NO - PROCESS IT IN ORDER CASE
K_SBUF: LD (K_BUF),A ; ELSE - REMEMBER IT & PROCESS LATER
RET
;----- END OF TEST
K_NXT: LD B,A
LD A,(KEY_DEL)
LD (K_CNT),A
LD (IX-_K_5CNT),5
LD A,B
AND 3FH
JR Z,K_STAT ; NO KEY (ONLY SHIFT)- SET STATUS
XOR (IX-_K_LAST)
AND 3FH ; KEY THE SAME?
JR NZ,K_DONE1 ; NO (JUST PRESSED) - DON'T CHANGE STAT
K_STAT: LD A,(FLAG) ; ELSE SET IT
XOR B
AND 3FH
XOR B
LD (FLAG),A
K_DONE1:LD (IX-_K_LAST),B
JR K_DONE
K_OLD: BIT 7,(IX-_K_CNT)
RET NZ
DEC (IX-_K_CNT)
RET NZ
LD A,(KEY_REP)
LD (K_CNT),A
K_DONE: LD A,(FLAG)
AND 0C0H
XOR (IX-_K_LAST)
JP P,KE_NOH
LD HL,K_ST1
LD C,K_ST1S
LD D,40
JR K_1
KE_NOH: BIT _K_SS,A
JR Z,K_PUT
LD D,40+K_ST1S
LD HL,K_ST2
LD C,K_ST2S
K_1: LD B,0
AND 3FH
CPIR
JR NZ,K_PUT
LD A,D
ADD A,C
K_PUT: OR A
RET Z
LD B,A
CP 2FH ; IS CAPS LOCK ?
JR NZ,K_CL
LD (IX-_K_CNT),80H ; YES - PASSIVATE REPEATOR
LD A,(FLAG)
XOR 10H ; IS _CAPS BIT !!!!!!
LD (FLAG),A
XOR A
RET
K_CL: CP 2BH ; IS ALT ?
JR NZ,K_AT
LD (IX-_K_CNT),80H ; YES - PASSIVATE REPEATOR
JR K_OK
K_AT: CP 7 ; IS SPACE
JR NZ,K_OK
BIT _BREAK,(IX-_FLAG1)
JR NZ,K_OK
LD A,(FLAG)
OR 3EH
INC A
JR NZ,K_OK
LD A,3
RST 18H
; LD HL,BIOS+3
; LD (ENT_ADR),HL
JP ENTR2
K_OK: LD A,(TAIL)
CP MAXQUI
LD HL,(BEEP_T)
JP Z,BEEP
LD HL,BEGQUI
CALL ADD_HL_A
INC (IX-_TAIL)
LD (HL),B
LD HL,(BEEP_K)
JP BEEP
_RK: BIT _FLEX_C,(IX-_FLAG) ; READ KEY FOR CP/M
JR Z,READ_W
CALL _SK
JR NZ,RD_KI
LD A,1
RST 18H
PUSH AF
CALL CUR_AC
POP AF
RST 18H
EI
CALL READ_W
PUSH AF
LD A,1
RST 18H
PUSH AF
CALL CUR_PA
POP AF
RST 18H
EI
POP AF
RET
READ_W:CALL STAT_K
OR A
JR Z,READ_W
RD_KI: CALL POPKEY
CALL K_ENCODE
RET
POPKEY:LD HL,BEGQUI+1
LD DE,BEGQUI
DEC (IX-_TAIL)
LD A,(DE)
LD BC,MAXQUI-1
LDIR
RET
STK_1: CALL POPKEY
STAT_K_
_SK: LD A,(TAIL)
OR A
RET Z
LD A,(BEGQUI)
CALL K_ENCODE
OR A
JR Z,STK_1
LD A,0FFH
RET
_RKNW
READ_KNW: LD A,(TAIL) ; READ KEY (NO WAIT)
OR A ; OUT: KEY AVAILABLE: A-0
LD A,1 ; C-CHAR, H-SCAN, L-KB. TYPE (0 FOR SINC)
JR Z,RKNW ; D-KEYB FLAGS (2 HI BIT)
CALL POPKEY ; NO KEY AVAILABLE: A-1
PUSH AF ; D-KEYB FLAGS (2 HI BIT)
CALL K_ENCODE
LD C,A
POP HL
XOR A
RKNW: LD L,0
LD D,(IX-_FLAG)
RET
_KBT
KB_TYP_
LD A,(TAIL) ; READ KEYB TYPE (L) & FLAGS (D)
OR A ; & KEY AVAIL. (A-0 AV, A-1 NO AV.)
LD A,1
JR Z,RKNW
XOR A
JR RKNW
K_ENCODE:
LD E,A
LD HL,KT_MAIN
CALL ADD_HL_A
LD A,(HL)
OR A
SCF
RET Z
CP ' '
RET Z
CP 0DH
JR NZ,KEN_2
LD A,(FLAG)
OR 3EH
INC A
LD A,0DH
RET NZ
LD A,0AH
RET
KEN_2: LD D,0
EX AF,AF'
LD A,E
BIT _RUS,(IX-_FLAG)
JR Z,IS_NREXT
CP 3AH
JR C,IS_NREXT
SUB 3AH
LD HL,KT_RUS
CALL ADD_HL_A
LD A,(HL)
EX AF,AF'
JR IS_REXT
IS_NREXT:CP 28H
JR NC,IS_EXT
DEC A
AND 6
CP 2
JR NZ,IS_LIT
INC D
IS_LIT: INC D
IS_EXT: INC D
IS_REXT:LD A,(FLAG)
AND 0C0H
RRA
RRA
RRA
RRA
ADD A,D
LD HL,KT_JMP
CALL ADD_HL_A
LD A,(HL)
CALL ADD_HL_A
EX AF,AF'
OR A
JP (HL)
;DK MACRO PAR
; IRP MRK,<PAR>
; DB MRK-$
; ENDM
; ENDM
KT_JMP; DUPL 0X10,0
; DK <<K_CRET>,<K_ERET>,<K_CRET>,<K_RET>>
; DK <<K_LOCK>,<K_LOCK>,<K_SYML>,<K_SYMN>>
; DK <<K_CAPS>,<K_?LIT>,<K_CAPS>,<K_SYMN>>
; DK <<K_LOCK>,<K_LOCK>,<K_CTRL>,<K_LOCK>>
DB LOW (K_CRET-$),LOW (K_ERET-$-1),LOW (K_CRET-$-2),LOW (K_RET-$-3)
DB LOW (K_LOCK-$),LOW (K_LOCK-$-1),LOW (K_SYML-$-2),LOW (K_SYMN-$-3)
DB LOW (K_CAPS-$),LOW (K__LIT-$-1),LOW (K_CAPS-$-2),LOW (K_SYMN-$-3)
DB LOW (K_LOCK-$),LOW (K_LOCK-$-1),LOW (K_CTRL-$-2),LOW (K_LOCK-$-3)
K_LOCK: XOR A
SCF
K_RET: RET
K_CAPS: XOR 20H
K_CRET: BIT _CAPS,(IX-_FLAG)
RET Z
XOR 20H
RET
K_CTRL: AND 1FH
RET
K_SYMN: SUB 10H
CP 0X22
JR Z,KSN_1
CP " "
RET NZ
LD A,"_"
RET
KSN_1: LD A,"@"
RET
K__LIT: SUB "("
CP 2
JR NC,K_LOCK
ADD A,A
ADD A,"["
RET
K_ERET: OR A
RET P
LD A,0EH
BIT _RUS,(IX-_FLAG)
RET NZ
INC A
RET
K_SYML: SUB "A"
LD HL,KT_SYM
CALL ADD_HL_A
LD A,(HL)
OR A
RET NZ
SCF
RET
; TABLES
KT_MAIN:DB 0,"AQ10P",0DH," "
DB "ZSW29OL",0
DB "XDE38IKM"
DB "CFR47UJN"
DB "VGT56YHB"
DB 18H,13H,5,80H,4,9,0,0,8,1BH
DB "*^/,-?.+(`=;):",0X22,"_"
KT_RUS: DB 5BH,5FH,"=;",5DH,5EH,40H,5CH
KT_SYM: DB "~*?",0X5C,0,"{}^",0,"-+=.,;",0X22,0,"<|>]/",0,"`[:"
SPKEYB_T JP KEYBOARD_; LOC_C13 ; -58=5F67
JP _RK; LOC_D0B ; -7F=5F40
JP STAT_K_; SUB_D50
JP READ_KNW; LOC_D61
JP KB_TYP_; LOC_D79
RET