C1 protocol from Steve Punter

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Jose Antonio Dias

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Jun 15, 1985, 2:05:20 PM6/15/85
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Hi ho!

I've seen a few requests for the source code for Steve Punter's new
protocol and thought that this might be of interest. This is the actual
pal source for term.c1 v2 It will operate at 1200 baud and it will
download. If you find this interesting then send me a note. I'm curious
as to just how far the article will travel and how many people are interested
int.

Jose Dias

-------------------------------cut here---------------------------------------

1000 rem save "@0:newprot.src.1200",8
1010 :
1020 open2,8,2,"@0:newprot1200,p,w"
1030 :
1040 sys700
1050 ;
1060 .opt o2
1070 ;
1080 differ = $0000
1090 startloc = $c000
1100 c64 = 1
1110 pnta = $62
1120 pntb = $64
1130 stat = $96
1140 defto = $009a ;default output device (kernal)
1150 ptr1 = $009e ;tape pass1 error log (kernal)
1160 bufpntr = $a6 ;pointer to tape i/o buffer (kernal) [2]
1170 tape1 = $b2 ;pointer to start of tape buffer (kernal) [2]
1180 robuf = $00f9 ;pointer to rs232 output buffer (kernal)
1190 lastch = $0200 ;last used character
1200 ridbe = $029b
1210 ridbs = $029c
1220 rodbs = $029d ;start position of rs232 output buffer (kernal)
1230 rodbe = $029e ;end position of rs232 output buffer (kernal)
1240 rs232enb = $02a1 ;rs232 enable=128, disable=255
1250 ibsout = $0326 ;chrout routine vector (kernal) [2]
1260 codebuf = $c800-differ ;buffer for incoming 3 chr codes
1270 bitpnt = $c803-differ ;bit pointer for allowable matches
1280 bitcnt = $c804-differ ;bit counter (0 to 4)
1290 bitpat = $c805-differ ;bit pattern for searches
1300 timer1 = $c806-differ ;timer for non-received characters (2)
1310 gbsave = $c808-differ ;location to save good bad signal needed
1320 bufcount = $c809-differ ;number of chrs to buffer into block
1330 delay = $c80b-differ ;delay for wait period
1340 skpdelay = $c80c-differ ;delay skip counter
1350 endflag = $c80d-differ ;flag to indicate last block
1360 check = $c80e-differ ;save place for checksum (4)
1370 check1 = $c812-differ ;secondary checksum holding place (4)
1380 bufpnt = $c816-differ ;pointer to current buffer
1390 recsize = $c817-differ ;size of received buffer
1400 maxsize = $c818-differ ;maximum block size
1410 blocknum = $c819-differ ;block number (2)
1420 filetype = $c81b-differ ;file type (from basic)
1430 stack = $c81c-differ ;stack pointer at entry
1440 dontdash = $c81d-differ ;flag to suppress dashes and colons
1450 specmode = $c81e-differ ;flag to send special start code
1460 buffer = $c900-differ ;buffer for block
1470 ;
1480 ;buffer positions
1490 ;
1500 sizepos = 4
1510 numpos = 5
1520 datapos = 7
1530 ;
1540 xmit = $cb00
1550 oldout = $cb02
1560 basic4 = $ef06 ;basic call from chrout
1570 basic3 = $ef3b ;basic call from chrout
1580 setup = $ef7e ;set up rs232 to receive again
1590 ;
1600 ;kernal locations
1610 ;
1620 basic1 = $f80d ;basic call from chrout
1630 basic2 = $f864 ;basic call from chrout
1640 readst = $ffb7
1650 chkin = $ffc6 ;open channel for input
1660 chkout = $ffc9 ;open channel for output
1670 clrchn = $ffcc ;close input and output channels
1680 chrin = $ffcf ;input character from channel
1690 chrout = $ffd2 ;output character to channel
1700 getin = $ffe4 ;get a character from keyboard queue
1710 zfffe = $fffe
1720 ;
1730 *=startloc
1740 ;
1750 lda #00 ;sys 49152
1760 .byt $2c
1770 lda #03 ;sys 49155
1780 .byt $2c
1790 lda #06 ;sys 49158
1800 .byt $2c
1810 lda #09 ;sys 49161
1820 .byt $2c
1830 lda #12 ;sys 49164
1840 .byt $2c
1850 lda #15 ;sys 49167
1860 nop
1870 jmp over
1880 jmp reset
1890 jmp init
1900 ;
1910 over sta pnta
1920 tsx
1930 stx stack
1940 lda #<table
1950 clc
1960 adc pnta
1970 sta jmppoint+1
1980 lda #>table
1990 adc #$00
2000 sta jmppoint+2
2010 jmppoint jmp table
2020 ;
2030 table jmp accept
2040 jmp receive
2050 jmp transmit
2060 jmp rectype
2070 jmp trantype
2080 jmp terminal
2090 jmp init
2100 ;
2110 codes .asc "goo"
2120 .asc "bad"
2130 .asc "ack"
2140 .asc "s/b"
2150 .asc "syn"
2160 ;
2170 ;accept characters and check for codes
2180 ;
2190 accept sta bitpat ;save required bit pattern
2200 lda #$00
2210 sta codebuf
2220 sta codebuf+1
2230 sta codebuf+2
2240 cd1 lda #$00
2250 sta timer1 ;clear timer
2260 sta timer1+1
2270 cd2 jsr exit
2280 jsr getnum ;get#5,a$
2290 lda stat
2300 bne cd3 ;if no chr, do timer check
2310 lda codebuf+1
2320 sta codebuf
2330 lda codebuf+2
2340 sta codebuf+1
2350 lda lastch
2360 sta codebuf+2
2370 lda #$00
2380 sta bitcnt ;clear bit counter
2390 lda #$01
2400 sta bitpnt ;initialize bit pointer
2410 cd4 lda bitpat ;look at bit pattern
2420 bit bitpnt ;is bit set
2430 beq cd5 ;no, don't check this code word
2440 ldy bitcnt
2450 ldx #$00
2460 cd6 lda codebuf,x
2470 cmp codes,y
2480 bne cd5
2490 iny
2500 inx
2510 cpx #$03
2520 bne cd6
2530 jmp cd7
2540 ;
2550 cd5 asl bitpnt ;shift bit pointer
2560 lda bitcnt
2570 clc
2580 adc #$03
2590 sta bitcnt
2600 cmp #15
2610 bne cd4
2620 jmp cd1
2630 ;
2640 cd7 lda #255
2650 sta timer1
2660 sta timer1+1
2670 jmp cd2
2680 ;
2690 cd3 inc timer1
2700 bne cd9
2710 inc timer1+1
2720 cd9 lda timer1+1
2730 ora timer1
2740 beq cd8
2750 lda timer1
2760 cmp #$07
2770 .if c64:lda timer1+1
2780 .if c64:cmp #20
2790 bcc cd2
2800 lda #$01
2810 sta stat
2820 jmp dodelay
2830 ;
2840 cd8 lda #$00
2850 sta stat
2860 rts
2870 ;
2880 ;
2890 .if c64:.goto 3210
2900 ;
2910 ;do a get# for pet
2920 ;
2930 getnum ldx #5
2940 jsr chkin
2950 jsr chrin
2960 sta lastch
2970 jsr clrchn
2980 rts
2990 ;
3000 ;do a get# for pet terminal mode
3010 ;
3020 getnum1 lda $e823
3030 bpl gt1
3040 ldx #5
3050 jsr chkin
3060 jsr chrin
3070 sta lastch
3080 jsr clrchn
3090 lda $e822
3100 lda #0
3110 sta stat
3120 rts
3130 ;
3140 gt1 lda #0
3150 sta lastch
3160 lda #2
3170 sta stat
3180 rts
3190 ;
3200 .goto 3540
3210 ;
3220 ;get# for c64
3230 ;
3240 getnum1 nop
3250 getnum tya
3260 pha
3270 lda ridbe
3280 cmp ridbs
3290 beq get1
3300 ldy ridbs
3310 lda ($f7),y
3320 pha
3330 inc ridbs
3340 lda #$00
3350 sta stat
3360 pla
3370 sta lastch
3380 pla
3390 tay
3400 jmp dorts
3410 ;
3420 get1 lda #$02
3430 sta stat
3440 lda #$00
3450 sta lastch
3460 pla
3470 tay
3480 ;
3490 dorts pha
3500 lda #$03
3510 sta $ba
3520 pla
3530 rts
3540 ;
3550 ;send a code
3560 ;
3570 sendcode ldx #$05
3580 jsr chkout
3590 ldx #$00
3600 sn1 lda codes,y
3610 jsr chrout
3620 iny
3630 inx
3640 cpx #$03
3650 bne sn1
3660 jmp clrchn
3670 ;
3680 ;do handshaking for reception end
3690 ;
3700 rechand sta gbsave ;save good or bad signal as needed
3710 lda #$00
3720 sta delay ;no delay
3730 rc1 lda #$02
3740 sta pnta
3750 ldy gbsave
3760 jsr sendcode ;send g/b signal
3770 rc9 lda #%00100 ;allow "ack" signals
3780 jsr accept ;wait for code
3790 lda stat
3800 beq rc2 ;if ok, send g/b signal again
3810 dec pnta
3820 bne rc9
3830 jmp rc1
3840 ;
3850 rc2 ldy #$09
3860 jsr sendcode ;send "s/b" code
3870 lda endflag
3880 beq rc5
3890 lda gbsave
3900 beq rc6
3910 rc5 lda buffer+sizepos
3920 sta bufcount
3930 sta recsize
3940 jsr recmodem ;wait for block
3950 lda stat
3960 cmp #%0001 ;check for good block
3970 beq rc4
3980 cmp #%0010 ;check for blank input
3990 beq rc2
4000 cmp #%0100 ;check for loss of signal
4010 beq rc4
4020 cmp #%1000 ;check for "ack" signal
4030 beq rc2
4040 rc4 rts
4050 ;
4060 rc6 lda #%10000 ;wait for "syn" signal
4070 jsr accept
4080 lda stat
4090 bne rc2 ;if not, send "s/b" again
4100 lda #10
4110 sta bufcount
4120 rc8 ldy #12 ;send "syn" signal
4130 jsr sendcode
4140 lda #%01000 ;wait for "s/b" signal
4150 jsr accept
4160 lda stat
4170 beq rc7
4180 dec bufcount
4190 bne rc8
4200 rc7 rts
4210 ;
4220 ;do handshaking for transmission end
4230 ;
4240 tranhand lda #$01
4250 sta delay ;use delay
4260 tx2 lda specmode
4270 beq tx20
4280 ldy #$00
4290 jsr sendcode ;send a "goo" signal
4300 tx20 lda #%01011 ;allow "goo", "bad", and "s/b"
4310 jsr accept ;wait for codes
4320 lda stat
4330 bne tx2 ;if no signal, wait again
4340 lda #$00
4350 sta specmode
4360 lda bitcnt
4370 cmp #$00 ;"good" signal
4380 bne tx10 ;no, resend old block
4390 lda endflag
4400 bne tx4
4410 inc blocknum
4420 bne tx7
4430 inc blocknum+1
4440 tx7 jsr thisbuf
4450 ldy #numpos ;block number high order part
4460 iny
4470 lda (pntb),y
4480 cmp #255
4490 bne tx3
4500 lda #$01
4510 sta endflag
4520 lda bufpnt
4530 eor #$01
4540 sta bufpnt
4550 jsr thisbuf
4560 jsr dummybl1
4570 jmp tx1
4580 ;
4590 tx3 jsr dummyblk ;yes, get new block
4600 tx1 lda #"-"
4610 .byt $2c
4620 tx10 lda #":"
4630 jsr prtdash
4640 ldy #$06
4650 jsr sendcode ;send "ack" code
4660 lda #%01000 ;allow only "s/b" code
4670 jsr accept ;wait for code
4680 lda stat
4690 bne tx1
4700 jsr thisbuf
4710 ldy #sizepos ;block size
4720 lda (pntb),y
4730 sta bufcount
4740 jsr altbuf
4750 ldx #$05
4760 jsr chkout
4770 ldy #$00
4780 tx6 lda (pntb),y ;transmit alternate buffer
4790 jsr chrout
4800 iny
4810 cpy bufcount
4820 bne tx6
4830 jsr clrchn
4840 lda #$00
4850 rts
4860 ;
4870 tx4 lda #"*"
4880 jsr prtdash
4890 ldy #$06
4900 jsr sendcode ;send "ack" signal
4910 lda #%01000
4920 jsr accept ;wait for "s/b" signal
4930 lda stat
4940 bne tx4 ;if not, resend "ack" signal
4950 lda #10
4960 sta bufcount
4970 tx5 ldy #12
4980 jsr sendcode ;send "syn" signal
4990 lda #%10000
5000 jsr accept ;wait for "syn" signal back
5010 lda stat
5020 beq tx8
5030 dec bufcount
5040 bne tx5
5050 tx8 lda #$03
5060 sta bufcount
5070 tx9 ldy #$09
5080 jsr sendcode ;send "s/b" signal
5090 lda #$00000
5100 jsr accept ;just wait
5110 dec bufcount
5120 bne tx9
5130 lda #$01
5140 rts
5150 ;
5160 ;receive a block from the modem
5170 ;
5180 ; stat returns with:
5190 ;
5200 ; bit 0 - buffered all characters successfully
5210 ; bit 1 - no characters received at all
5220 ; bit 2 - insufficient characters received
5230 ; bit 3 - "ack" signal received
5240 ;
5250 recmodem ldy #$00 ;start index
5260 rcm5 lda #$00 ;clear timers
5270 sta timer1
5280 sta timer1+1
5290 rcm1 jsr exit
5300 jsr getnum ;get a chr from the modem
5310 lda stat
5320 bne rcm2 ;no character received
5330 lda lastch
5340 sta buffer,y ;save chr in buffer
5350 cpy #$03 ;chr one of the first 3
5360 bcs rcm3 ;no, skip code check
5370 sta codebuf,y ;save chr in code buffer
5380 cpy #$02 ;on the 3rd chr
5390 bne rcm3 ;no, don't look at chrs yet
5400 lda codebuf ;check for a "ack" signal
5410 cmp #"a"
5420 bne rcm3
5430 lda codebuf+1
5440 cmp #"c"
5450 bne rcm3
5460 lda codebuf+2
5470 cmp #"k"
5480 beq rcm4 ;"ack" found
5490 rcm3 iny ;inc index
5500 cpy bufcount ;buffered all chrs
5510 bne rcm5 ;no, buffer next
5520 lda #%0001 ;yes, return bit 0 set
5530 sta stat
5540 rts
5550 ;
5560 rcm4 lda #$ff ;"syn" found, set timer to -1
5570 sta timer1
5580 sta timer1+1
5590 jmp rcm1 ;see if there is another chr
5600 ;
5610 rcm2 inc timer1 ;inc timer
5620 bne rcm6
5630 inc timer1+1
5640 rcm6 lda timer1
5650 ora timer1+1 ;timer now at zero
5660 beq rcm7 ;"syn" found with no following chrs
5670 lda timer1
5680 cmp #$06
5690 .if c64:lda timer1+1
5700 .if c64:cmp #16 ;time out yet
5710 bne rcm1 ;no, get next chr
5720 lda #%0010 ;yes, set bit 1
5730 sta stat
5740 cpy #$00
5750 beq rcm9
5760 lda #%0100 ;but if chrs received, set bit 2
5770 sta stat
5780 rcm9 jmp dodelay
5790 ;
5800 rcm7 lda #%1000 ;"ack" found, set bit 2
5810 sta stat
5820 rts
5830 ;
5840 ;create dummy block for transmission
5850 ;
5860 dummyblk lda bufpnt
5870 eor #$01
5880 sta bufpnt
5890 jsr thisbuf ;read block into "this" buffer
5900 ldy #numpos ;block number
5910 lda blocknum
5920 clc
5930 adc #$01
5940 sta (pntb),y ;set block number low part
5950 iny
5960 lda blocknum+1
5970 adc #$00
5980 sta (pntb),y ;set block number high part
5990 ldx #$02
6000 jsr chkin
6010 ldy #datapos ;actual block
6020 db1 jsr chrin
6030 sta (pntb),y
6040 iny
6050 jsr readst
6060 bne db4
6070 cpy maxsize
6080 bne db1
6090 tya
6100 pha
6110 jmp db5
6120 ;
6130 db4 tya
6140 pha
6150 ldy #numpos ;block number
6160 iny ;high part
6170 lda #255
6180 sta (pntb),y
6190 jmp db5
6200 ;
6210 dummybl1 pha ;save size of just read block
6220 db5 jsr clrchn
6230 .if c64:jsr reset
6240 .if c64:jsr dod2
6250 .if c64:jsr reset
6260 ldy #sizepos ;block size
6270 lda (pntb),y
6280 sta bufcount ;set bufcount for checksum
6290 jsr altbuf
6300 pla
6310 ldy #sizepos ;block size
6320 sta (pntb),y
6330 jsr checksum
6340 rts
6350 ;
6360 ;set pointers for current buffer
6370 ;
6380 thisbuf lda #<buffer
6390 sta pntb
6400 lda bufpnt
6410 clc
6420 adc #>buffer
6430 sta pntb+1
6440 rts
6450 ;
6460 ;set pointer b for alternate buffer
6470 ;
6480 altbuf lda #<buffer
6490 sta pntb
6500 lda bufpnt
6510 eor #$01
6520 clc
6530 adc #>buffer
6540 sta pntb+1
6550 rts
6560 ;
6570 ;calculate checksum
6580 ;
6590 checksum lda #$00
6600 sta check1
6610 sta check1+1
6620 sta check1+2
6630 sta check1+3
6640 ldy #sizepos
6650 cks1 lda check1
6660 clc
6670 adc (pntb),y
6680 sta check1
6690 bcc cks2
6700 inc check1+1
6710 cks2 lda check1+2
6720 eor (pntb),y
6730 sta check1+2
6740 lda check1+3
6750 rol a ;set or clear carry flag
6760 rol check1+2
6770 rol check1+3
6780 iny
6790 cpy bufcount
6800 bne cks1
6810 ldy #$00
6820 lda check1
6830 sta (pntb),y
6840 iny
6850 lda check1+1
6860 sta (pntb),y
6870 iny
6880 lda check1+2
6890 sta (pntb),y
6900 iny
6910 lda check1+3
6920 sta (pntb),y
6930 rts
6940 ;
6950 ;transmit a program
6960 ;
6970 transmit lda #$00
6980 sta endflag
6990 sta skpdelay
7000 sta dontdash
7010 lda #$01
7020 sta bufpnt
7030 lda #$ff
7040 sta blocknum
7050 sta blocknum+1
7060 jsr altbuf
7070 ldy #sizepos ;block size
7080 lda #datapos
7090 sta (pntb),y
7100 jsr thisbuf
7110 ldy #numpos ;block number
7120 lda #$00
7130 sta (pntb),y
7140 iny
7150 sta (pntb),y
7160 trm1 jsr tranhand
7170 beq trm1
7180 rec3 lda #$00
7190 sta lastch
7200 rts
7210 ;
7220 ;receive a file
7230 ;
7240 receive lda #$01
7250 sta blocknum
7260 lda #$00
7270 sta blocknum+1
7280 sta endflag
7290 sta bufpnt
7300 sta buffer+numpos ;block number
7310 sta buffer+numpos+1
7320 sta skpdelay
7330 lda #datapos
7340 sta buffer+sizepos ;block size
7350 lda #$00
7360 rec1 jsr rechand
7370 lda endflag
7380 bne rec3
7390 jsr match ;do checksums match
7400 bne rec2 ;no
7410 jsr clrchn
7420 lda bufcount
7430 cmp #datapos
7440 beq rec7
7450 ldx #$02
7460 jsr chkout
7470 ldy #datapos
7480 rec6 lda buffer,y
7490 jsr chrout
7500 iny
7510 cpy bufcount
7520 bne rec6
7530 jsr clrchn
7540 rec7 lda buffer+numpos+1 ;block number high order part
7550 cmp #$ff
7560 bne rec4
7570 lda #$01
7580 sta endflag
7590 lda #"*"
7600 .byt $2c
7610 rec4 lda #"-"
7620 jsr chrout
7630 .if c64:jsr reset
7640 lda #$00
7650 jmp rec1
7660 ;
7670 rec2 jsr clrchn
7680 lda #":"
7690 jsr chrout
7700 lda recsize
7710 sta buffer+sizepos
7720 lda #$03
7730 jmp rec1
7740 ;
7750 ;see if checksums match
7760 ;
7770 match lda buffer
7780 sta check
7790 lda buffer+1
7800 sta check+1
7810 lda buffer+2
7820 sta check+2
7830 lda buffer+3
7840 sta check+3
7850 jsr thisbuf
7860 lda recsize
7870 sta bufcount
7880 jsr checksum
7890 lda buffer
7900 cmp check
7910 bne mtc1
7920 lda buffer+1
7930 cmp check+1
7940 bne mtc1
7950 lda buffer+2
7960 cmp check+2
7970 bne mtc1
7980 lda buffer+3
7990 cmp check+3
8000 bne mtc1
8010 lda #$00
8020 rts
8030 ;
8040 mtc1 lda #$01
8050 rts
8060 ;
8070 ;receive file type block
8080 ;
8090 rectype lda #$00
8100 sta blocknum
8110 sta blocknum+1
8120 sta endflag
8130 sta bufpnt
8140 sta skpdelay
8150 lda #datapos
8160 clc
8170 adc #$01
8180 sta buffer+sizepos
8190 lda #$00
8200 rct3 jsr rechand
8210 lda endflag
8220 bne rct1
8230 jsr match
8240 bne rct2
8250 lda buffer+datapos
8260 sta filetype
8270 lda #$01
8280 sta endflag
8290 lda #$00
8300 jmp rct3
8310 ;
8320 rct2 lda recsize
8330 sta buffer+sizepos
8340 lda #$03
8350 jmp rct3
8360 ;
8370 rct1 lda #$00
8380 sta lastch
8390 rts
8400 ;
8410 ;transmit file type
8420 ;
8430 trantype lda #$00
8440 sta endflag
8450 sta skpdelay
8460 lda #$01
8470 sta bufpnt
8480 sta dontdash
8490 lda #255
8500 sta blocknum
8510 sta blocknum+1
8520 jsr altbuf
8530 ldy #sizepos ;block size
8540 lda #datapos
8550 clc
8560 adc #$01
8570 sta (pntb),y
8580 jsr thisbuf
8590 ldy #numpos ;block number
8600 lda #255
8610 sta (pntb),y
8620 iny
8630 sta (pntb),y
8640 ldy #datapos
8650 lda filetype
8660 sta (pntb),y
8670 lda #$01
8680 sta specmode
8690 trf1 jsr tranhand
8700 beq trf1
8710 lda #$00
8720 sta lastch
8730 rts
8740 ;
8750 ;do delay for timing
8760 ;
8770 dodelay inc skpdelay
8780 lda skpdelay
8790 cmp #$03
8800 bcc dod1
8810 lda #$00
8820 sta skpdelay
8830 lda delay
8840 beq dod2
8850 bne dod3
8860 ;
8870 dod1 lda delay
8880 beq dod3
8890 ;
8900 dod2 ldx #$00
8910 lp1 ldy #$00
8920 lp2 iny
8930 bne lp2
8940 inx
8950 cpx #120
8960 bne lp1
8970 dod3 rts
8980 ;
8990 ;print dash, colon, or star
9000 ;
9010 prtdash pha
9020 lda blocknum
9030 ora blocknum+1
9040 beq prtd1
9050 lda dontdash
9060 bne prtd1
9070 pla
9080 jsr chrout
9090 pha
9100 prtd1 pla
9110 rts
9120 ;
9130 ;reset rs232 port
9140 ;
9150 reset jsr setup
9160 lda rs232enb
9170 cmp #$80
9180 beq reset
9190 cmp #$92
9200 beq reset
9210 rts
9220 ;
9230 ;terminal emulation routine
9240 ;
9250 terminal jsr cursor
9260 term jsr getnum1
9270 lda stat
9280 bne keybj
9290 lda lastch
9300 and #$7f
9310 sta lastch
9320 cmp #$08
9330 beq ok1
9340 cmp #$0d
9350 beq ok1
9360 cmp #$20
9370 bpl ok1
9380 keybj jmp keyboard
9390 ;
9400 ok1 cmp #"a"+$20
9410 bcc ok2
9420 cmp #"z"+$21
9430 bcs ok2
9440 sec
9450 sbc #$20
9460 sta lastch
9470 jmp ok3
9480 ;
9490 ok2 cmp #$41
9500 bcc ok3
9510 cmp #"z"+1
9520 bcs ok3
9530 clc
9540 adc #$80
9550 sta lastch
9560 ;
9570 ok3 cmp #$08
9580 bne ok4
9590 lda #$14
9600 sta lastch
9610 ok4 cmp #34 ;quote
9620 bne ok5
9630 jsr chrout
9640 lda #20
9650 jsr chrout
9660 lda #34
9670 ok5 lda lastch
9680 cmp #$0d
9690 bne ok6
9700 lda #$20
9710 jsr chrout
9720 lda #$0d
9730 ok6 jsr chrout
9740 jsr cursor
9750 ;
9760 keyboard jsr getin
9770 beq term
9780 sta lastch
9790 cmp #$13 ;clr/home key
9800 beq termout
9810 cmp #"a"
9820 bcc ok7 ;<"a"
9830 cmp #"z"+1
9840 bcs ok7 ;>"z"
9850 clc
9860 adc #$20 ;to lowercase ascii
9870 sta lastch
9880 jmp ok8
9890 ;
9900 ok7 lda lastch
9910 cmp #"a"+$80
9920 bcc ok8 ;<"a"
9930 cmp #"z"+$81
9940 bcs ok8 ;>"z"
9950 sec
9960 sbc #$80 ;to uppercase ascii
9970 sta lastch
9980 ;
9990 ok8 cmp #20 ;backspace
10000 bne ok9
10010 lda #$08
10020 sta lastch
10030 ok9 cmp #$83 ;shift r/s
10040 bne oka
10050 lda #$10 ;ctrl p
10060 sta lastch
10070 oka ldx #$05
10080 jsr chkout
10090 lda lastch
10100 jsr chrout
10110 jsr clrchn
10120 jmp terminal
10130 ;
10140 termout rts ;with clr/home
10150 ;
10160 cursor lda #$12
10170 jsr chrout
10180 lda #$20
10190 jsr chrout
10200 lda #$9d
10210 jsr chrout
10220 lda #$92
10230 jsr chrout
10240 ;
10250 ;check for commodore key
10260 ;
10270 exit lda $028d ;is commodore
10280 cmp #$02 ;key down
10290 bne exit1
10300 exit2 pla
10310 tsx
10320 cpx stack
10330 bne exit2
10340 exit1 lda #$01
10350 sta lastch
10360 rts
10370 ;
10380 ;move chrout vector if necessary
10390 ;
10400 init lda ibsout ;been moved yet
10410 cmp #<newout
10420 bne init1 ;no, change it
10430 lda ibsout+1
10440 cmp #>newout
10450 beq init2 ;yes, leave it
10460 init1 lda ibsout ;store old chrout vector
10470 sta oldout
10480 lda ibsout+1
10490 sta oldout+1
10500 lda #<newout ;set new chrout vector
10510 sta ibsout
10520 lda #>newout
10530 sta ibsout+1
10540 init2 rts
10550 ;
10560 ;new chrout routine to correct for 1200 baud speed problems
10570 ;
10580 newout pha ;dupliciaton of original kernal routines
10590 lda defto ;test dfault output device for
10600 cmp #$03 ;screen, and...
10610 bne newout1
10620 pla ;if so, go back to original rom routines
10630 jmp (oldout)
10640 ;
10650 newout1 bcc newout2 ;if device number less than 3,
10660 pla ;also go back to original kernal routines
10670 jmp (oldout)
10680 ;
10690 newout2 lsr a
10700 pla
10710 sta ptr1
10720 txa
10730 pha
10740 tya
10750 pha
10760 bcc newout9
10770 jsr basic1
10780 bne newout5
10790 jsr basic2
10800 bcs newout7
10810 lda #$02
10820 ldy #$00
10830 sta (tape1),y
10840 iny
10850 sty bufpntr
10860 newout5 lda ptr1
10870 sta (tape1),y
10880 newout6 clc
10890 newout7 pla
10900 tay
10910 pla
10920 tax
10930 lda ptr1
10940 bcc newout8
10950 lda #$00
10960 newout8 rts
10970 ;
10980 newout9 jsr newout10
10990 jmp newout6
11000 ;
11010 newout11 jsr newout12
11020 newout10 ldy rodbe
11030 iny
11040 cpy rodbs
11050 beq newout11
11060 sty rodbe
11070 dey
11080 lda ptr1
11090 sta (robuf),y
11100 ;
11110 newout12 lda rs232enb
11120 lsr a
11130 bcs newout13
11140 lda #$10
11150 sta $dd0e
11160 lda xmit
11170 sta $dd04
11180 lda xmit+1
11190 sta $dd05
11200 lda #$81
11210 jsr basic3
11220 jsr basic4
11230 lda #$11
11240 sta $dd0e
11250 newout13 rts
11260 ;
11270 .end
--

Jose A. Dias University of Toronto Computing Services
-------------------------------------------------------------------------------
The above ascii characters are not, have not ever been, or will ever
be, the opinion of anybody, being, or super-intelligent shade of the
colour blue. They were just a fluke. They were put together by
randomnly selecting phrases from Vogon poetry...
-------------------------------------------------------------------------------
uucp: {decvax,ihnp4,utcsri,{allegra,linus}!utzoo}!utcs!jose
bitnet: JOSE@UTORONTO
300/1200: (416)535-5360 (As the crow flies... :-)

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