PROGRAM LISTING: 84-12/INFOBITS.ASM

10 ; LISTING 2
15 ; INFOBITS.ASM
30 ICCOM =   $0342
40 ICBAL =   $0344
50 ICBAH =   $0345
60 ICBLL =   $0348
70 ICBLH =   $0349
80 CIOV  =   $E456
90 PUTREC =  $09
0100 GETREC = $05
0110 ROWCUR = $54
0120 CH  =   $02FC
0130 EOL =   $9B
0140 RBLL =  $0358
0150 SBUFL = $E0
0160 SBUFH = $E1
0170 SBLL =  $E2
0180 R   =   $E3
0190 RBUF =  $03FD
0200     *=  $0600
0210     PLA 
0220     PLA 
0230     STA SBUFH
0240     PLA 
0250     STA SBUFL
0260     PLA 
0270     PLA 
0280     STA SBLL
0290 ;
0300 GET LDX #$10
0310     LDA #GETREC
0320     STA ICCOM,X
0330     LDA #RBUF&$FF
0340     STA ICBAL,X
0350     LDA #RBUF/256
0360     STA ICBAH,X
0361     LDA #131
0363     STA ICBLL,X
0365     LDA #0
0367     STA ICBLH,X
0370     JSR CIOV
0380     BMI END
0390 ;
0400     LDX #0
0420     LDY #0
0450 P1  LDA RBUF,X
0460 P2  CMP (SBUFL),Y
0470     BEQ P3
0480     CPY #0
0490     BEQ P4
0500     LDY #0
0505     LDX R
0510     JMP P4
0520 P3  INY 
0530     CPY SBLL
0540     BCS PRINT
0560 P4  INX 
0570     CPX RBLL
0580     BCS GET
0585     CPY #0
0590     BNE P1
0595     STX R
0600     JMP P1
0610 ;
0620 END RTS 
0630 ;
0800 PRINT LDX #$20
0810     LDA #PUTREC
0820     STA ICCOM,X
0830     LDA #131
0840     STA ICBLL,X
0850     LDA #0
0860     STA ICBLH,X
0870 ;
0880     LDA ROWCUR
0890     CMP #20
0900     BCS PROMPT
0910 ;
0920     LDA #RBUF+$0A&$FF
0930     STA ICBAL,X
0940     LDA #RBUF+$0A/256
0950     STA ICBAH,X
0970     JSR CIOV
0980     JMP GET
0990 ;
1000 PROMPT LDA #MESSAGE&$FF
1010     STA ICBAL,X
1020     LDA #MESSAGE/256
1030     STA ICBAH,X
1040     JSR CIOV
1050 WAIT LDA CH
1060     CMP #255
1070     BEQ WAIT
1072     LDA #255
1074     STA CH
1080     LDA #CLEAR&$FF
1090     STA ICBAL,X
1100     LDA #CLEAR/256
1110     STA ICBAH,X
1120     LDA #5
1130     STA ICBLL,X
1140     LDA #0
1150     STA ICBLH,X
1160     JSR CIOV
1170     JMP PRINT
2000 ;
2010 MESSAGE .BYTE " ÁÎÙ ËÅÙ ",EOL
2015 CLEAR .BYTE "}",EOL