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14-04-89/TSDP2
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » CEEFAX disks » telesoftware15.adl |
| Filename: | 14-04-89/TSDP2 |
| Read OK: | ✔ |
| File size: | 1F41 bytes |
| Load address: | FFFF1A00 |
| Exec address: | FFFF8023 |
File contents
10REM> TSDP2
20MODE7
30VDU23,1,0;0;0;0;
40DIM mcode &500 :REM: space for machine code
50DIM buff 40 :REM: TSDP buffer
60PROCmcode :REM: assemble machine code
70ttx$=CHR$(141)+CHR$(132)+CHR$(157)+CHR$(131)+"Television Service Data Packet 2 "+CHR$(156)
80PRINTTAB(0,1)ttx$
90PRINTTAB(0,2)ttx$
100INPUTTAB(10,4)"TV channel (1-4) = "answer$
110channel?0=EVAL("&"+LEFT$(answer$,1))+&1B
120IF channel?0 < &1C THEN channel?0 = &1C
130IF channel?0 > &1F THEN channel?0 = &1F
140PRINTTAB(5,7)"TSDP type ="
150PRINTTAB(5,8)"Initial page ="
160PRINTTAB(5,9)"Network ID code ="
170PRINTTAB(5,10)"Sound ="
180PRINTTAB(5,11)"Rating ="
190PRINTTAB(5,12)"Data ="
200PRINTTAB(5,13)"Day ="
210PRINTTAB(5,14)"Month ="
220PRINTTAB(5,15)"Hours ="
230PRINTTAB(5,16)"Minutes ="
240PRINTTAB(5,17)"Country ="
250PRINTTAB(5,18)"Source ="
260PRINTTAB(5,19)"Message ="
270CALL mcode :REM: enable TTX interrupts
280ONERROR GOTO 320
290REPEAT
300IF grabflag?0=2 PROCdisplay
310UNTIL FALSE
320CALL mcode :REM: disable TTX interrupts
330VDU31,0,21,23,1,1;0;0;0;
340END
350DEFPROCdisplay
360PRINTTAB(17,7);buff?0 :REM: TSDP type
370b0=((buff?4)AND8)<>0:REM: bit 0 of magazine number
380b1=((buff?6)AND4)<>0:REM: bit 1 of magazine number
390b2=((buff?6)AND8)<>0:REM: bit 2 of magazine number
400init=0:REM: initial magazine number
410IF b0 init=1
420IF b1 init=init+2
430IF b2 init=init+4
440PRINTTAB(20,8);~init;:REM: initial magazine
450PRINT;~buff?2;~buff?1;:REM: initial page
460PRINT;" ";~((buff?6)AND3);~buff?5;~((buff?4)AND7);~buff?3:REM: initial sub-page
470PRINTTAB(23,9);~buff?7;~buff?8;~buff?9;~buff?10 :REM: Network ID code
480CALL reverse :REM: reverse bits in VPS
490sound=((vps?0)AND192)DIV64
500IF sound=0 OR sound=3 PRINTTAB(13,10)"two channel sound"
510IF sound=1 PRINTTAB(13,10)"stereo"
520IF sound=2 PRINTTAB(13,10)"mono"
530rate=((vps?0)AND48)DIV16
540IF rate=2 PRINTTAB(14,11)"unrated" ELSE PRINTTAB(14,11)"restricted" :REM: programme rating
550valid=((vps?0)AND12)DIV4 :REM: data validity
560IF valid>1 PRINTTAB(12,12)"valid" ELSE PRINTTAB(12,12)"invalid":GOTO 650
570PRINTTAB(11,13);(((vps?0)AND3)*8)+(((vps?1)AND224)DIV32) :REM: day
580PRINTTAB(13,14);((vps?1)AND30)DIV2 :REM: month
590PRINTTAB(13,15);(((vps?1)AND1)*32)+(((vps?2)AND240)DIV16) :REM: hours
600PRINTTAB(15,16);(((vps?2)AND15)*4)+(((vps?3)AND192)DIV64) :REM: minutes
610country=((vps?3)AND61)DIV4 :REM: country of origin
620IF country=12 PRINTTAB(15,17)"UK" ELSE PRINTTAB(15,17);country
630PRINTTAB(14,18);(((vps?3)AND3)*16)+(((vps?4)AND240)DIV16) :REM: source
640VDU31,15,19 :REM: print message
650FOR byte=20 TO 39
660VDU (buff?byte OR &80)
670NEXT
680VDU7
690grabflag?0=0 :REM: grabflag = searching
700ENDPROC
710DEFPROCmcode
720packet=&70 :REM: row number of current packet
730magazine=&71 :REM: magazine number of current page
740grabflag=&72 :REM: page grabber flag
750channel=&73 :REM: TV channel
760temp=&74 :REM: temporary store
770vps=&75 :REM: decoded VPS, 5 bytes
780savereg=&FC :REM: interrupt accumulator save register
790irq2v=&206 :REM: IRQ2 vector
800ttxcontrol=&FC10 :REM: TTX control register, write only
810ttxstatus=&FC10 :REM: TTX status register, read only
820rowreg=&FC11 :REM: TTX row register, write only
830datareg=&FC12 :REM: TTX data register, read & write
840statclr=&FC13 :REM: TTX clear status register, read & write
850FOR pass=0 TO 2 STEP 2
860P%=mcode
870[OPT pass
880LDA #&00
890STA grabflag \ grabflag = searching
900LDX irq2v \ load secondary interrupt vector
910LDY irq2v+1
920CPY #interrupt DIV 256 \ has the vector been altered?
930BEQ disable \ branch if interrupt vector altered
940STX oldirq2v \ save secondary interrupt vector
950STY oldirq2v+1
960LDX #interrupt MOD 256 \ install new interrupt routine
970LDY #interrupt DIV 256
980SEI \ disable interrupts when altering vector
990STX irq2v
1000STY irq2v+1
1010CLI \ re-enable interrupts
1020LDA channel \ load (channel number + #&1C)
1030STA ttxcontrol \ enable TTX
1040RTS \ return to BASIC
1050.disable
1060LDA #&00
1070STA ttxcontrol \ disable TTX
1080LDX oldirq2v \ load original vector
1090LDY oldirq2v+1
1100SEI \ disable interrupts when altering vector
1110STX irq2v \ restore original vector
1120STY irq2v+1
1130CLI \ re-enable interrupts
1140RTS \ return to BASIC
1150.interrupt
1160BIT ttxstatus \ poll TTX hardware
1170BMI ttxinter \ branch if TTX interrupt
1180JMP (oldirq2v) \ not TTX interrupt
1190.ttxinter
1200LDA savereg \ interrupt accumulator save register
1210PHA \ push interrupt accumulator save register
1220TXA
1230PHA \ push X
1240TYA
1250PHA \ push Y
1260LDA grabflag \ has TSDP been grabbed?
1270BNE clearstatus \ clear status and RTI if TSDP grabbed
1280CLD \ clear decimal flag
1290LDY #&00 \ start with row 0
1300.readttxt
1310STY rowreg \ try rows 0 to 15
1320LDA datareg \ load framing code (#&27)
1330BEQ emptyrow \ if zero try next row
1340TYA
1350PHA \ save row number
1360JSR readpacket
1370PLA
1380TAY \ restore row number
1390.emptyrow
1400INY \ increment row number
1410CPY #&10 \ try rows 0 - 15
1420BNE readttxt
1430.clearstatus
1440LDA #&00
1450LDY #&0F \ clear 16 rows in adaptor
1460.clearloop
1470STY rowreg
1480STA datareg
1490DEY
1500BPL clearloop
1510STA statclr \ clear status flags before returning
1520PLA
1530TAY \ restore Y
1540PLA
1550TAX \ restore X
1560PLA
1570STA savereg \ restore interrupt accumulator save register
1580RTI \ return from interrupt
1590.readpacket
1600LDA grabflag \ just checking
1610BNE return
1620LDY datareg \ read magazine number
1630LDA hamtable,Y \ de-ham it
1640BMI return \ stop loading if error
1650STA magazine \ save magazine number
1660LDY datareg \ read packet number
1670LDA hamtable,Y \ de-ham it
1680BMI return \ stop loading if error
1690STA packet \ save packet number
1700LDA magazine \ load magazine number
1710CMP #&08 \ bit 3 of mag. number is bit 0 of packet number
1720ROL packet \ 5 bit packet number
1730AND #&07 \ use only bits 0-2
1740CMP #&00 \ is this magazine 0?
1750BNE return
1760LDA packet
1770CMP #&1E \ look for TSDP
1780BNE return \ ignore all other packets
1790LDY #&00 \ read bytes 0 - 39
1800.readmore
1810LDX datareg \ read data register
1820LDA hamtable,X \ de-ham the byte
1830BMI return \ return if error
1840STA buff,Y \ store in buffer
1850INY \ increment index
1860CPY #&14
1870BCC readmore \ go back for more
1880.readagain
1890LDA datareg \ read data register
1900STA buff,Y \ store in buffer
1910INY \ increment index
1920CPY #&28 \ decimal 40
1930BNE readagain \ go back for more
1940LDA buff \ TSDP type byte
1950AND #&0E \ %00001110
1960STA grabflag \ grabflag = 0 or 2
1970.return
1980RTS
1990.reverse
2000LDX #&14 \ VPS nybbles in bytes &0B - &13
2010LDY #&04 \ decode VPS into 5 bytes
2020.join
2030LDA buff,X \ load VPS nybble
2040ASL A \ move low nybble into high
2050ASL A
2060ASL A
2070ASL A
2080STA temp \ temporary zero page store
2090DEX \ point to next nybble
2100LDA buff,X \ load VPS nybble
2110ORA temp \ join two nybbles into one byte
2120STA vps,Y \ and store in zero page
2130DEX \ point to next nybble
2140DEY \ point to next byte
2150BPL join \ branch if more VPS bytes
2160LDX #&04 \ VPS now in 5 zero page bytes
2170.outerloop
2180LDA vps,X \ reverse bits in all VPS bytes
2190STA temp \ temporary zero page store
2200LDY #&07
2210.innerloop
2220ROL temp \ bit into carry
2230ROR A \ carry into accumulator
2240DEY
2250BPL innerloop
2260STA vps,X \ store reversed byte
2270DEX
2280BPL outerloop \ go back if more VPS bytes
2290RTS
2300.oldirq2v
2310EQUW &00
2320.hamtable
2330EQUD &0101FF01
2340EQUD &FF0100FF
2350EQUD &FF0102FF
2360EQUD &07FFFF0A
2370EQUD &FF0100FF
2380EQUD &00FF0000
2390EQUD &0BFFFF06
2400EQUD &FF0300FF
2410EQUD &FF010CFF
2420EQUD &07FFFF04
2430EQUD &07FFFF06
2440EQUD &070707FF
2450EQUD &05FFFF06
2460EQUD &FF0D00FF
2470EQUD &FF060606
2480EQUD &07FFFF06
2490EQUD &FF0102FF
2500EQUD &09FFFF04
2510EQUD &02FF0202
2520EQUD &FF0302FF
2530EQUD &05FFFF08
2540EQUD &FF0300FF
2550EQUD &FF0302FF
2560EQUD &0303FF03
2570EQUD &05FFFF04
2580EQUD &FF040404
2590EQUD &FF0F02FF
2600EQUD &07FFFF04
2610EQUD &050505FF
2620EQUD &05FFFF04
2630EQUD &05FFFF06
2640EQUD &FF030EFF
2650EQUD &FF010CFF
2660EQUD &09FFFF0A
2670EQUD &0BFFFF0A
2680EQUD &FF0A0A0A
2690EQUD &0BFFFF08
2700EQUD &FF0D00FF
2710EQUD &0B0B0BFF
2720EQUD &0BFFFF0A
2730EQUD &0CFF0C0C
2740EQUD &FF0D0CFF
2750EQUD &FF0F0CFF
2760EQUD &07FFFF0A
2770EQUD &FF0D0CFF
2780EQUD &0D0DFF0D
2790EQUD &0BFFFF06
2800EQUD &FF0D0EFF
2810EQUD &09FFFF08
2820EQUD &090909FF
2830EQUD &FF0F02FF
2840EQUD &09FFFF0A
2850EQUD &FF080808
2860EQUD &09FFFF08
2870EQUD &0BFFFF08
2880EQUD &FF030EFF
2890EQUD &FF0F0CFF
2900EQUD &09FFFF04
2910EQUD &0F0FFF0F
2920EQUD &FF0F0EFF
2930EQUD &05FFFF08
2940EQUD &FF0D0EFF
2950EQUD &FF0F0EFF
2960EQUD &0EFF0E0E
2970]
2980NEXT
2990ENDPROC
�> TSDP2
�7
�23,1,0;0;0;0;
(+� mcode &500 :�: space for machine code
2 � buff 40 :�: TSDP buffer
<$�mcode :�: assemble machine code
FPttx$=�(141)+�(132)+�(157)+�(131)+"Television Service Data Packet 2 "+�(156)
P�0,1)ttx$
Z�0,2)ttx$
d'�10,4)"TV channel (1-4) = "answer$
n$channel?0=�("&"+�answer$,1))+&1B
x'� channel?0 < &1C � channel?0 = &1C
�'� channel?0 > &1F � channel?0 = &1F
��5,7)"TSDP type ="
��5,8)"Initial page ="
� �5,9)"Network ID code ="
��5,10)"Sound ="
��5,11)"Rating ="
��5,12)"Data ="
��5,13)"Day ="
��5,14)"Month ="
��5,15)"Hours ="
��5,16)"Minutes ="
��5,17)"Country ="
��5,18)"Source ="
�5,19)"Message ="
%� mcode :�: enable TTX interrupts
� � �D@A
"�
,� grabflag?0=2 �display
6� �
@&� mcode :�: disable TTX interrupts
J�31,0,21,23,1,1;0;0;0;
T�
^
��display
h �17,7);buff?0 :�: TSDP type
r2b0=((buff?4)�8)<>0:�: bit 0 of magazine number
|2b1=((buff?6)�4)<>0:�: bit 1 of magazine number
�2b2=((buff?6)�8)<>0:�: bit 2 of magazine number
�%init=0:�: initial magazine number
�� b0 init=1
�� b1 init=init+2
�� b2 init=init+4
�&�20,8);~init;:�: initial magazine
�&�;~buff?2;~buff?1;:�: initial page
�I�;" ";~((buff?6)�3);~buff?5;~((buff?4)�7);~buff?3:�: initial sub-page
�@�23,9);~buff?7;~buff?8;~buff?9;~buff?10 :�: Network ID code
�%� reverse :�: reverse bits in VPS
�sound=((vps?0)�192)�64
�3� sound=0 � sound=3 �13,10)"two channel sound"
� � sound=1 �13,10)"stereo"
� sound=2 �13,10)"mono"
rate=((vps?0)�48)�16
J� rate=2 �14,11)"unrated" � �14,11)"restricted" :�: programme rating
&*valid=((vps?0)�12)�4 :�: data validity
08� valid>1 �12,12)"valid" � �12,12)"invalid":� �tJB
:7�11,13);(((vps?0)�3)*8)+(((vps?1)�224)�32) :�: day
D%�13,14);((vps?1)�30)�2 :�: month
N:�13,15);(((vps?1)�1)*32)+(((vps?2)�240)�16) :�: hours
X<�15,16);(((vps?2)�15)*4)+(((vps?3)�192)�64) :�: minutes
b0country=((vps?3)�61)�4 :�: country of origin
l0� country=12 �15,17)"UK" � �15,17);country
v;�14,18);(((vps?3)�3)*16)+(((vps?4)�240)�16) :�: source
� �31,15,19 :�: print message
�� byte=20 � 39
�� (buff?byte � &80)
��
��7
�)grabflag?0=0 :�: grabflag = searching
��
� ��mcode
�/packet=&70 :�: row number of current packet
�4magazine=&71 :�: magazine number of current page
�&grabflag=&72 :�: page grabber flag
� channel=&73 :�: TV channel
� temp=&74 :�: temporary store
$vps=&75 :�: decoded VPS, 5 bytes
7savereg=&FC :�: interrupt accumulator save register
irq2v=&206 :�: IRQ2 vector
9ttxcontrol=&FC10 :�: TTX control register, write only
*6ttxstatus=&FC10 :�: TTX status register, read only
41rowreg=&FC11 :�: TTX row register, write only
>5datareg=&FC12 :�: TTX data register, read & write
H=statclr=&FC13 :�: TTX clear status register, read & write
R� pass=0 � 2 � 2
\ P%=mcode
f
[OPT pass
p LDA #&00
z'STA grabflag \ grabflag = searching
�/LDX irq2v \ load secondary interrupt vector
�LDY irq2v+1
�7CPY #interrupt � 256 \ has the vector been altered?
�4BEQ disable \ branch if interrupt vector altered
�2STX oldirq2v \ save secondary interrupt vector
�STY oldirq2v+1
�8LDX #interrupt � 256 \ install new interrupt routine
�LDY #interrupt � 256
�1SEI \ disable interrupts when altering vector
�
STX irq2v
�STY irq2v+1
� CLI \ re-enable interrupts
�.LDA channel \ load (channel number + #&1C)
STA ttxcontrol \ enable TTX
RTS \ return to BASIC
.disable
$ LDA #&00
. STA ttxcontrol \ disable TTX
8'LDX oldirq2v \ load original vector
BLDY oldirq2v+1
L1SEI \ disable interrupts when altering vector
V'STX irq2v \ restore original vector
`STY irq2v+1
j CLI \ re-enable interrupts
tRTS \ return to BASIC
~.interrupt
�%BIT ttxstatus \ poll TTX hardware
�*BMI ttxinter \ branch if TTX interrupt
�&JMP (oldirq2v) \ not TTX interrupt
�
.ttxinter
�5LDA savereg \ interrupt accumulator save register
�2PHA \ push interrupt accumulator save register
�TXA
�PHA \ push X
�TYA
�PHA \ push Y
�)LDA grabflag \ has TSDP been grabbed?
�:BNE clearstatus \ clear status and RTI if TSDP grabbed
CLD \ clear decimal flag
LDY #&00 \ start with row 0
.readttxt
!STY rowreg \ try rows 0 to 15
(*LDA datareg \ load framing code (#&27)
2'BEQ emptyrow \ if zero try next row
<TYA
FPHA \ save row number
PJSR readpacket
ZPLA
d TAY \ restore row number
n
.emptyrow
x INY \ increment row number
� CPY #&10 \ try rows 0 - 15
�BNE readttxt
�.clearstatus
� LDA #&00
�'LDY #&0F \ clear 16 rows in adaptor
�.clearloop
�STY rowreg
�STA datareg
�DEY
�BPL clearloop
�5STA statclr \ clear status flags before returning
�PLA
�TAY \ restore Y
PLA
TAX \ restore X
PLA
"=STA savereg \ restore interrupt accumulator save register
, RTI \ return from interrupt
6.readpacket
@ LDA grabflag \ just checking
JBNE return
T&LDY datareg \ read magazine number
^ LDA hamtable,Y \ de-ham it
h&BMI return \ stop loading if error
r'STA magazine \ save magazine number
|$LDY datareg \ read packet number
� LDA hamtable,Y \ de-ham it
�&BMI return \ stop loading if error
�#STA packet \ save packet number
�'LDA magazine \ load magazine number
�=CMP #&08 \ bit 3 of mag. number is bit 0 of packet number
�$ROL packet \ 5 bit packet number
� � #&07 \ use only bits 0-2
�"CMP #&00 \ is this magazine 0?
�BNE return
�LDA packet
� CMP #&1E \ look for TSDP
�)BNE return \ ignore all other packets
� LDY #&00 \ read bytes 0 - 39
.readmore
$LDX datareg \ read data register
$LDA hamtable,X \ de-ham the byte
& BMI return \ return if error
0 STA buff,Y \ store in buffer
:INY \ increment index
D CPY #&14
N#BCC readmore \ go back for more
X.readagain
b$LDA datareg \ read data register
l STA buff,Y \ store in buffer
vINY \ increment index
�CPY #&28 \ decimal 40
�$BNE readagain \ go back for more
� LDA buff \ TSDP type byte
�� #&0E \ %00001110
�$STA grabflag \ grabflag = 0 or 2
� .return
�RTS
� .reverse
�-LDX #&14 \ VPS nybbles in bytes &0B - &13
�&LDY #&04 \ decode VPS into 5 bytes
� .join
� LDA buff,X \ load VPS nybble
�%ASL A \ move low nybble into high
ASL A
ASL A
ASL A
(STA temp \ temporary zero page store
* DEX \ point to next nybble
4 LDA buff,X \ load VPS nybble
>,�A temp \ join two nybbles into one byte
H&STA vps,Y \ and store in zero page
R DEX \ point to next nybble
\ DEY \ point to next byte
f'BPL join \ branch if more VPS bytes
p+LDX #&04 \ VPS now in 5 zero page bytes
z.outerloop
�-LDA vps,X \ reverse bits in all VPS bytes
�(STA temp \ temporary zero page store
� LDY #&07
�.innerloop
� ROL temp \ bit into carry
�"ROR A \ carry into accumulator
�DEY
�BPL innerloop
�#STA vps,X \ store reversed byte
�DEX
�-BPL outerloop \ go back if more VPS bytes
�RTS
�
.oldirq2v
EQUW &00
.hamtable
EQUD &0101FF01
$EQUD &FF0100FF
.EQUD &FF0102FF
8EQUD &07FFFF0A
BEQUD &FF0100FF
LEQUD &00FF0000
VEQUD &0BFFFF06
`EQUD &FF0300FF
jEQUD &FF010CFF
tEQUD &07FFFF04
~EQUD &07FFFF06
�EQUD &070707FF
�EQUD &05FFFF06
�EQUD &FF0D00FF
�EQUD &FF060606
�EQUD &07FFFF06
�EQUD &FF0102FF
�EQUD &09FFFF04
�EQUD &02FF0202
�EQUD &FF0302FF
�EQUD &05FFFF08
�EQUD &FF0300FF
�EQUD &FF0302FF
EQUD &0303FF03
EQUD &05FFFF04
EQUD &FF040404
EQUD &FF0F02FF
(EQUD &07FFFF04
2EQUD &050505FF
<EQUD &05FFFF04
FEQUD &05FFFF06
PEQUD &FF030EFF
ZEQUD &FF010CFF
dEQUD &09FFFF0A
nEQUD &0BFFFF0A
xEQUD &FF0A0A0A
�EQUD &0BFFFF08
�EQUD &FF0D00FF
�EQUD &0B0B0BFF
�EQUD &0BFFFF0A
�EQUD &0CFF0C0C
�EQUD &FF0D0CFF
�EQUD &FF0F0CFF
�EQUD &07FFFF0A
�EQUD &FF0D0CFF
�EQUD &0D0DFF0D
�EQUD &0BFFFF06
�EQUD &FF0D0EFF
�EQUD &09FFFF08
EQUD &090909FF
EQUD &FF0F02FF
EQUD &09FFFF0A
"EQUD &FF080808
,EQUD &09FFFF08
6EQUD &0BFFFF08
@EQUD &FF030EFF
JEQUD &FF0F0CFF
TEQUD &09FFFF04
^EQUD &0F0FFF0F
hEQUD &FF0F0EFF
rEQUD &05FFFF08
|EQUD &FF0D0EFF
�EQUD &FF0F0EFF
�EQUD &0EFF0E0E
�]
��
��
� 00000000 0d 00 0a 0c f4 3e 20 54 53 44 50 32 0d 00 14 06 |.....> TSDP2....|
00000010 eb 37 0d 00 1e 12 ef 32 33 2c 31 2c 30 3b 30 3b |.7.....23,1,0;0;|
00000020 30 3b 30 3b 0d 00 28 2b de 20 6d 63 6f 64 65 20 |0;0;..(+. mcode |
00000030 26 35 30 30 20 3a f4 3a 20 73 70 61 63 65 20 66 |&500 :.: space f|
00000040 6f 72 20 6d 61 63 68 69 6e 65 20 63 6f 64 65 0d |or machine code.|
00000050 00 32 1d de 20 62 75 66 66 20 34 30 20 3a f4 3a |.2.. buff 40 :.:|
00000060 20 54 53 44 50 20 62 75 66 66 65 72 0d 00 3c 24 | TSDP buffer..<$|
00000070 f2 6d 63 6f 64 65 20 3a f4 3a 20 61 73 73 65 6d |.mcode :.: assem|
00000080 62 6c 65 20 6d 61 63 68 69 6e 65 20 63 6f 64 65 |ble machine code|
00000090 0d 00 46 50 74 74 78 24 3d bd 28 31 34 31 29 2b |..FPttx$=.(141)+|
000000a0 bd 28 31 33 32 29 2b bd 28 31 35 37 29 2b bd 28 |.(132)+.(157)+.(|
000000b0 31 33 31 29 2b 22 54 65 6c 65 76 69 73 69 6f 6e |131)+"Television|
000000c0 20 53 65 72 76 69 63 65 20 44 61 74 61 20 50 61 | Service Data Pa|
000000d0 63 6b 65 74 20 32 20 20 22 2b bd 28 31 35 36 29 |cket 2 "+.(156)|
000000e0 0d 00 50 0e f1 8a 30 2c 31 29 74 74 78 24 0d 00 |..P...0,1)ttx$..|
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00000310 63 6f 64 65 20 3a f4 3a 20 64 69 73 61 62 6c 65 |code :.: disable|
00000320 20 54 54 58 20 69 6e 74 65 72 72 75 70 74 73 0d | TTX interrupts.|
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00000820 02 80 1f ef 33 31 2c 31 35 2c 31 39 20 3a f4 3a |....31,15,19 :.:|
00000830 20 70 72 69 6e 74 20 6d 65 73 73 61 67 65 0d 02 | print message..|
00000840 8a 12 e3 20 62 79 74 65 3d 32 30 20 b8 20 33 39 |... byte=20 . 39|
00000850 0d 02 94 17 ef 20 28 62 75 66 66 3f 62 79 74 65 |..... (buff?byte|
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000009e0 49 52 51 32 20 76 65 63 74 6f 72 0d 03 20 39 74 |IRQ2 vector.. 9t|
000009f0 74 78 63 6f 6e 74 72 6f 6c 3d 26 46 43 31 30 20 |txcontrol=&FC10 |
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00000a70 54 58 20 72 6f 77 20 72 65 67 69 73 74 65 72 2c |TX row register,|
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00000aa0 20 54 54 58 20 64 61 74 61 20 72 65 67 69 73 74 | TTX data regist|
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00000ae0 73 74 61 74 75 73 20 72 65 67 69 73 74 65 72 2c |status register,|
00000af0 20 72 65 61 64 20 26 20 77 72 69 74 65 0d 03 52 | read & write..R|
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00000c60 35 36 20 5c 20 69 6e 73 74 61 6c 6c 20 6e 65 77 |56 \ install new|
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00000ca0 49 20 5c 20 64 69 73 61 62 6c 65 20 69 6e 74 65 |I \ disable inte|
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00000cd0 54 58 20 69 72 71 32 76 0d 03 e8 0f 53 54 59 20 |TX irq2v....STY |
00000ce0 69 72 71 32 76 2b 31 0d 03 f2 1e 43 4c 49 20 5c |irq2v+1....CLI \|
00000cf0 20 72 65 2d 65 6e 61 62 6c 65 20 69 6e 74 65 72 | re-enable inter|
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00000d10 6e 6e 65 6c 20 5c 20 6c 6f 61 64 20 28 63 68 61 |nnel \ load (cha|
00000d20 6e 6e 65 6c 20 6e 75 6d 62 65 72 20 2b 20 23 26 |nnel number + #&|
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00000d50 54 58 0d 04 10 19 52 54 53 20 5c 20 72 65 74 75 |TX....RTS \ retu|
00000d60 72 6e 20 74 6f 20 42 41 53 49 43 0d 04 1a 0c 2e |rn to BASIC.....|
00000d70 64 69 73 61 62 6c 65 0d 04 24 0c 4c 44 41 20 23 |disable..$.LDA #|
00000d80 26 30 30 0d 04 2e 20 53 54 41 20 74 74 78 63 6f |&00... STA ttxco|
00000d90 6e 74 72 6f 6c 20 5c 20 64 69 73 61 62 6c 65 20 |ntrol \ disable |
00000da0 54 54 58 0d 04 38 27 4c 44 58 20 6f 6c 64 69 72 |TTX..8'LDX oldir|
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00000de0 53 45 49 20 5c 20 64 69 73 61 62 6c 65 20 69 6e |SEI \ disable in|
00000df0 74 65 72 72 75 70 74 73 20 77 68 65 6e 20 61 6c |terrupts when al|
00000e00 74 65 72 69 6e 67 20 76 65 63 74 6f 72 0d 04 56 |tering vector..V|
00000e10 27 53 54 58 20 69 72 71 32 76 20 5c 20 72 65 73 |'STX irq2v \ res|
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00000e30 63 74 6f 72 0d 04 60 0f 53 54 59 20 69 72 71 32 |ctor..`.STY irq2|
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00000e50 65 6e 61 62 6c 65 20 69 6e 74 65 72 72 75 70 74 |enable interrupt|
00000e60 73 0d 04 74 19 52 54 53 20 5c 20 72 65 74 75 72 |s..t.RTS \ retur|
00000e70 6e 20 74 6f 20 42 41 53 49 43 0d 04 7e 0e 2e 69 |n to BASIC..~..i|
00000e80 6e 74 65 72 72 75 70 74 0d 04 88 25 42 49 54 20 |nterrupt...%BIT |
00000e90 74 74 78 73 74 61 74 75 73 20 5c 20 70 6f 6c 6c |ttxstatus \ poll|
00000ea0 20 54 54 58 20 68 61 72 64 77 61 72 65 0d 04 92 | TTX hardware...|
00000eb0 2a 42 4d 49 20 74 74 78 69 6e 74 65 72 20 5c 20 |*BMI ttxinter \ |
00000ec0 62 72 61 6e 63 68 20 69 66 20 54 54 58 20 69 6e |branch if TTX in|
00000ed0 74 65 72 72 75 70 74 0d 04 9c 26 4a 4d 50 20 28 |terrupt...&JMP (|
00000ee0 6f 6c 64 69 72 71 32 76 29 20 5c 20 6e 6f 74 20 |oldirq2v) \ not |
00000ef0 54 54 58 20 69 6e 74 65 72 72 75 70 74 0d 04 a6 |TTX interrupt...|
00000f00 0d 2e 74 74 78 69 6e 74 65 72 0d 04 b0 35 4c 44 |..ttxinter...5LD|
00000f10 41 20 73 61 76 65 72 65 67 20 5c 20 69 6e 74 65 |A savereg \ inte|
00000f20 72 72 75 70 74 20 61 63 63 75 6d 75 6c 61 74 6f |rrupt accumulato|
00000f30 72 20 73 61 76 65 20 72 65 67 69 73 74 65 72 0d |r save register.|
00000f40 04 ba 32 50 48 41 20 5c 20 70 75 73 68 20 69 6e |..2PHA \ push in|
00000f50 74 65 72 72 75 70 74 20 61 63 63 75 6d 75 6c 61 |terrupt accumula|
00000f60 74 6f 72 20 73 61 76 65 20 72 65 67 69 73 74 65 |tor save registe|
00000f70 72 0d 04 c4 07 54 58 41 0d 04 ce 10 50 48 41 20 |r....TXA....PHA |
00000f80 5c 20 70 75 73 68 20 58 0d 04 d8 07 54 59 41 0d |\ push X....TYA.|
00000f90 04 e2 10 50 48 41 20 5c 20 70 75 73 68 20 59 0d |...PHA \ push Y.|
00000fa0 04 ec 29 4c 44 41 20 67 72 61 62 66 6c 61 67 20 |..)LDA grabflag |
00000fb0 5c 20 68 61 73 20 54 53 44 50 20 62 65 65 6e 20 |\ has TSDP been |
00000fc0 67 72 61 62 62 65 64 3f 0d 04 f6 3a 42 4e 45 20 |grabbed?...:BNE |
00000fd0 63 6c 65 61 72 73 74 61 74 75 73 20 5c 20 63 6c |clearstatus \ cl|
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00001f41 
14-04-89/TSDP2.m0
14-04-89/TSDP2.m1
14-04-89/TSDP2.m2
14-04-89/TSDP2.m4
14-04-89/TSDP2.m5
.