;Source code for TELCOM.200
;Revised - 11/13/87
;Disassembly of TELCOM (24573-26530)
;Modified for "Split-Screen"
;The codes that are part of SS routine are noted by '*'or boxed in by dashed lines.


;BEGIN - TELCOM entry

/.122
CALL 20323:HL=24667:CALL 20420:JMP .1

/.2
CALL 20293:HL=24667:CALL 28192
/.5
CALL 29003:HL=.2:SHL 61236:HL=24627:CALL 26526:CALL 21750:RST 2:AND A:JZ .5
DE=.6:CALL 33773:JZ .2
RET

/.6;Telcom hook table
/['STAT' .125
/['TERM' .126
/['CALL' .127
/['FIND' .128
/['MENU' 26532
RST 7


/.125;Stat
DEC HL:RST 2:INC A:DEC A:JNZ .7

/.1
HL=61244:B=#7
/.8
A=M:RST 4:INC HL:DEC B:JNZ .8
A=#44:RST 4:LDA 61252:AND A:A=#79:JZ .9
A=#65
/.9
RST 4:A=#44:RST 4:LDA 61172:AND A:JNZ .10
A=#84:RST 4:JMP .5

/.10
RRA:A=#50:SBC B:RST 4:HL=24759:CALL 13591:JMP .5

/.7
JC .12
CMP #44:JZ .13
CALL 4116:CMP #77:JNZ .2
INC HL
/.12
CALL 6429:CALL 34741:DEC HL:RST 2:AND A:JZ .5

/.13
RST 1:INC L:DEC HL:RST 2:CMP #44:JZ .14
CALL 4116:CMP #65:JZ .15
SUB #79:JNZ .2

/.15
STA 61252:RST 2:AND A:JZ .5

/.14
RST 1:INC L:DEC HL:RST 2:JC .16
CALL 4116:SUB #84:JNZ .2
JMP .17

/.16
CALL 4440:CMP #20:JZ .17
SUB #10:JNZ .2
INC A
/.17
STA 61172:JMP .5

/.23
HL=24898:CALL 28150:POP DE:CALL .19:JZ .2
XCHG:ORA #55

/b1:/.127:/f1;Call
PUSH HL:HL=24898:CC 28150:POP HL:CALL 25131:JC .2
JNZ .5
JMP .21


/.128;Find
SUB A:CALL 29020:PUSH HL:CALL 28234:JZ .2
CALL 28300:XCHG:POP HL
/.24
CALL 28738:JNC .5
PUSH HL:PUSH DE:CALL 29044:CALL .19:CNZ .22:CALL 20286:CALL 28808:JZ .5
CMP #67:JZ .23
POP DE:CALL 28790:POP HL:JMP .24

/.19
CALL .25:RZ
RST 4:CMP #58:INC DE:JNZ .19
JMP .26

/.22
CALL .25:RZ
CMP #60:JZ 24993
CMP #58:RZ
RST 4:INC DE:JMP .22


/.25
CALL 28797:DEC DE:A=[DE:RZ

/.26
CMP #26:JZ .2
RET


/.51
lda 64781:sta .32:sra:jc 25046;Shift-F4
jmp 25063


/.66;Term label
/['Pre' 246
/['Dow' 238
/[' U' 240
/[128
/[128
/[128
/[128
/['By' 229

/.126;Term
HL=61243:RST 2:CNC 16808:PUSH AF:CALL 6429:POP AF:CMC:CC .51:JC .65


/.21;Entry point for DIRACC
A=#64:STA 61234:STA 61286:XOR A:sta .251;*:sta .225;*:STA 62704:STA 62705:STA 64749:STA 64751
dec a:sta .30
CALL 21499:HL=.66:CALL 28192:CALL 25790:CALL 25808:CALL 25820:CALL 20423:CALL 20328
;turn SS on
call .33;*

/.79;Term loop
CALL 29013:HL=.70:SHL 61236
CALL 34412:CC .71;no carrier
LDA 64754:AND A:JZ .72
LDA 64752:HL=61636:XOR M:RRA:CC 25820
/.72
CALL 5154:CALL 26437:JNZ .74
CALL 5124:JZ .75
CALL 4855
/.74;key pressed
B=A:JC .76

;intercept key
;------------------------------------
lda 61194:and a:jz .252;label is off
lda .251:sra:jnc .252;SS is off
;call SS routine
push bc:a=b:call .206:pop bc:jmp .253
;------------------------------------

/.252
a=b;*:AND A:CNZ 26402:JC .78
/.253
LDA 61241:AND A:A=B:CZ 23045;Half dupx
/.75
CALL 34056:JZ .79
CALL 34073:B=A:JC .79
CMP #127:JNZ .80
LDA 61244:CMP #58:JNC .79
A=B
/.80
RST 4:HL=64749:A=M:M=B:CMP #27:A=B:JNZ .81
CMP #73:JNZ .81
LDA 62704:AND A:JNZ .81
HL=25674:B=#8
/.83
A=M:CALL 34371:INC HL:DEC B:JNZ .83
A=#73
/.81
CALL 25682;Echo to LPT
CALL .85:JMP .79


/.78
XOR A:STA 64752:STA 64751
/.86
CALL 35689:JC .86
JMP .79

/.70
CALL 20293:XOR A:STA 61242:CALL 25808:JMP .79

/.76
E=A:D=#255:HL=.87:+DE:+DE:A=M:INC HL:H=M:L=A:DE=.79:PUSH DE:PCHL

;Term hook table
/[.129;Prev
/[.130;Down
/[.131;Up
/[25784;Full/Half
/[25802;Echo
/[25754;?
/[.133;?
/[.136;Bye
/.87
/.133:a=#58:sta 62711:jmp 40084;do RST 7


/.129;Prev
;toggle SS
;--------------------------------
lda 61194:and a:jz 25757;goto Prev if label is off
lda 64781:sra:jnc 25757;or no shift
/.33:hl=.251:inc m:a=m:sra
jnc 20423;SS off
call .250:jmp .215;SS on
;--------------------------------


/.131;Up
HL=.95:jmp 25882


/.130;Down
CALL 11362:lda 62704:xor #255:sta 62704:JZ 26188
HL=.107:jmp 26137


/.85
C=A:LDA 62704:AND A:A=C:RZ
CALL 26274:RZ
JNC .112
CALL .112:A=#10
/.112
LHL 62706:CALL 30583:SHL 62706:RNC
call 20293;beep if DL aborted
/.107
xor a:sta 62704:CALL 28226:HL=26485:JMP .114

/.95
HL=26470
/.114
CALL 26526:HL=26494:CALL 13591:XOR A:STA 62705:STA 62704:JMP .79


/.136;Bye
HL=26515:CALL 26526:a='?':rst 4
CALL 4855:rst 4
push af:call 20286:pop af
CALL 4116:CMP #89:JZ .65
HL=26494:CALL 4556:JMP .79

/.71;carrier lost
lda .32:sra:rc;do not detect carrier
HL=26445:CALL 26526
/.65
CALL 25018:CALL 34741
/.119
XOR A:STA 61234:L=A:H=A:LDA 62704:PUSH AF:SHL 62704:CALL 20333:CALL 30545:POP AF:AND A:CNZ .121:JMP .122



;---------------------------
;Split Screen routine

;Use Ramdir for SS buffer
/.30=62485;ramdir end
/.32=62486;Lost Carr enable
/.251=62487;toggle
/.225=62488;macro status
/.200=62489;cursor's column pos
/.202=62490;cursor addr
/.204=62492;buffer end pntr
/.201=62494;key buffer - 133 bytes
;Use Input buffer for display buffer
/.239=61296;40 bytes



/.206;subroutine begins here
call .3;store key or do macro


;Format and output to the display buffer
/.215:lhl .202
/.29:DE=.201:LDA .200
/.238:ORA A:JZ .237
DEC A:C=A:DEC HL:A=M:CMP #9:A=C:JNZ .238
SUB #7:JNC .238

/.237
ADD #8:B=A:DE=.239:PUSH DE:C=#40
/.245
A=M:ORA A:JNZ .240
INC HL:a=#40:SUB C:B=A:LDA .200:CMP B:A=B:B=C:JC .241
STA .200:JMP .241

/.240
INC HL:CMP #9:JNZ .242

/.241;Simulate TAB with spaces
A=#32
/.244
[DE=A:INC DE:DEC C:JZ .243
DEC B:JNZ .244
DEC DE:INC C
/.242
B=#8:[DE=A:INC DE:DEC C:JNZ .245
/.243
POP HL;hl=display buffer


;Display it
call 20333;cursor off
DE=64864;LCD buffer for writing one line
b=#40;40 chrs in a line

/.249:PUSH HL:PUSH DE
;Chk for non-viewable chr
a=m:SUB #32:JNC .247
XOR A

/.247;get bit pattern of the Ascii chr
L=A:h=#0:+HL:+HL:+HL:DE=36963:+DE

POP DE:PUSH DE:C=#7
/.248;store the bit pattern to LCD buffer
A=M:[DE=A:INC HL:A=E:ADD #40:E=A:A=D:ADC #0:D=A:DEC C:jnz .248

;Underline if at cursor
LDA .200:SUB #40:ADD b:A=M:JNZ .246
cma
/.246:[de=a
POP DE:INC DE:POP HL:INC HL:DEC b:JNZ .249;next chr

;write the bit pattern info to LCD
xor a;ZF on = write
L=#16;on line 16
call 36468;call write
jmp 20328;cursor back on and exit



/.3;Check for macro mode
b=a:hl=.225:dec m:jz .226;Do macro
inc m
;Activate Macro if- 
cmp #27;ESC?:jz .34
cmp #31;Down Arrow?:jz .34



/.46;Do its function or store it.
;HL=cursor addr, DE=buffer end, BC=buffer start, A=key pressed
A=B:LHL .204:XCHG:LHL .202:BC=.201

CMP #127;DEL?:JZ .208
CMP #32;CTRL code?:JNC .209;store
CMP #9;TAB?:JZ .209;store


CMP #8;BKSP?:JNZ .232

;backspace, delete
-BC:jZ 26402:+BC
/.220;
B=H:C=L:DEC BC
/.36
A=[BC:PUSH AF:PUSH BC
/.211;
A=M:[BC=A:RST 3:INC BC:INC HL:JNZ .211
h=b:l=c:dec hl:SHL .204:POP HL:POP AF:JC .212
/.219;
C=#8:CMP #9:JZ .213
C=#1
/.213;
LDA .200:SUB C:JNC .214
/.222;
XOR A
/.214;
STA .200
/.212;
SHL .202:ret


/.208;delete
RST 3:rz
INC HL:JMP .220


/.232:cmp #2;CTRL-B?:jnz .210

;delete left side of cursor
-bc:jz 26402:+bc:xor a:sta .200:jmp .36


/.210:CMP #28;Right Arrow?:JNZ .216

;move cursor right
RST 3:rZ
JMP .217

/.216:CMP #29;Left Arrow?:JNZ .218

;cursor left
-bc:rZ:+bc
/.27:DEC HL:A=M:JMP .219


/.218:CMP #1;SH-Left Arrow?:JNZ .227

;back a word
d=b:e=c:C=#0
/.228;
RST 3:JZ .222
INC C:DEC HL:A=M:CMP #48:JNC .228
CMP #9:JNZ .213
A=C:ADD #7:C=A:JMP .213


/.227:CMP #6;SH-Right Arrow?:JNZ .229

;advance a word
C=#0
/.231;
RST 3:JZ .236
inc c:A=M:CMP #9:JNZ .230
A=C:ADD #7:C=A
/.230;
INC HL:A=M:CMP #48:JNC .231
/.236;
LDA .200:ADD C:CMP #40:JC .214
A=#39:JMP .214


/.229:CMP #21;CTRL-U?:JNZ .38

;clear buffer
xchg:-bc:jz 26402;already empty
/.250;
XOR A:STA .200:hl=.201
/.233;
SHL .204:M=#0:JMP .212


/.38:CMP #14;CTRL-N?:JNZ .224
;clear buffer on the right side of cursor
b=a:rst 3:a=b:jz 26402
jmp .233


/.224
cmp #13;CR?:jz .203
cmp #30;UP Arrow?:jnz 26402
and a


/.203;Xmit buffer content
push af:d=b:e=c:rst 3:jz .28;empty
/.31:push bc:call .27:pop bc:and a:jnz .31

/.28:push bc:b=h:c=l:pop hl
/.254:push bc:push hl:-bc:+bc:cnc .29:pop hl:pop bc
a=m:and a:jz .255;done
call 26402:call 26108:inc hl:jmp .254


;Attach CR if CR was pressed, and exit
/.255:pop af:cz 26402:jmp .250



/.209;Store a chr in buffer
xchg:b=a:a=l:sub c:adc #1
cmp #134:jnc 20293;full
cmp #79:cz 20293
PUSH bc:B=H:C=L:INC HL:SHL .204
/.234;
A=[BC:M=A:DEC BC:DEC HL:RST 3:JNZ .234
POP bc:M=b
/.217;
A=M:C=#8:CMP #9:inc hl:JZ .236
C=#1:JMP .236


/.34:inc m:ret;activate macro


/.226;get macro
push bc:call 11362;reset fl pntrs
hl=.47;macro file name
de=63302;move file name here
c=#6:call 15445;move
call 11197;find the file
pop bc:rz;MACROS.DO not found

;Find the macro string and put it in buffer
/.48;find macro name
a=[de:cmp b:jnz .223
;found
inc de
/.45:a=[de:inc de:b=a:cmp #26:rz;end of file
cmp #13:jnz .49
a=[de:cmp #10:rz
/.49;load macro
push de:call .46:pop de:jmp .45;next chr

/.223;try next line
a=[de:inc de:cmp #26:rz;end of file, exit
cmp #13:jnz .223
a=[de:cmp #10:jnz .223
inc de:jmp .48


/.47:/['MACROS';macro text file name
;-----------------------------------

;END