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P/+COD5_1
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 » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_27.ADF |
| Filename: | P/+COD5_1 |
| Read OK: | ✔ |
| File size: | 18C6 bytes |
| Load address: | D204556 |
| Exec address: | 0000 |
File contents
CODE5 - AN EXPLANATION ~~~~~~~~~~~~~~~~~~~~~~ (or How EUG ticks!!) By Richard Dimond Since the Assembler for my latest coding for the running of EUG has been published , I thought that it was time I explained how it works. First, I will give a brief account of its development. When EUG first appeared on disc, the text was written into BASIC programs and all text files had to be converted. To avoid this, it was necessary to find a way to print a text file to screen. Programs like *TYPE were not satisfactory since the View control codes (16 & 26) for formatting caused problems. Also the disc was read direct with the text loaded in 256 byte blocks which caused a lot of screen flashing in MODE3. I decided that the files should be LOADed into memory in MODE6 with HIMEM lowered. The text could then be read to screen in MODE3, ignoring the formatting bytes. This prints the text as if unformatted and avoids the flashing of the screen. At first this was done with a short BASIC routine added to the menu but later I made up a simple M/code routine to do this. When the question of 40 column printing was asked for, I again initially made a BASIC listing as before. This was also followed by a coded version. Gus had also asked me whether it would be possible to provide for a different type of printing so that he need not use capitals only. After much thought I made up CODE4 which has been used for some time now. This also included the perforation skip routine which had also been asked for. Since I got my Master, I realised that the different styles of print did not work on the Master as CHR$255 used by the routine prints an inverted space. So I have added a short routine which sets up the new character using VDU23 as required with the Master and renamed the code CODE5. This made it necessary to make a small change to V-TYPE and so it is now VTYPE5. I made up this little program so that you could see how your text files would appear in the mag. I found that the version on EUG26 was an early one and I had since modified this so that you could alter HIMEM if you wish. On default it will enter &2600 as on the discs. This version is now on this disc. PROGRAM OPERATION ~~~~~~~~~~~~~~~~~ The program reads the value of HIMEM and this must be set to a lower value before the code is used. Lines 90 -120 set up the variable addresses and lines 130 - 150 set up the printer codes. The routine 'clear', lines 190- 280 is a simple loop which loads a zero into all bytes from HIMEM up to the screen start address (&4000 in MODE3). This is necessary as I found that the easiest way to find the end of the file was to check for a zero byte. The assembly of the print routine starts at line 770. The two flags (bdflg & itflg) for the two highlights are set to zero (off) at line 775. Line 780 is equivalent of *FX135 which returns the MODE number into Y register. This is compared with 3 and if equal the modeflag is set to zero, if not it is set to 255(-1) to indicate MODE 6 (lines 790 -810). Line 820 is another *FX call (117). This sets bit 0 if the printer is enabled and this is read by ANDing with 1. This sets 'prtflg' to 0 (printer off) or 1 (printer enabled). Ignoring the instruction in line 850 for the moment, lines 860 & 870 set the address in &70,71 to HIMEM. The print loop is assembled in lines 880 - 970. Line 900 returns to BASIC if zero byte found (end of file). Lines 910,920 toggle the highlight flags if the View codes &1C or &1D are found for bold or italic printing and the formatting codes are skipped at lines 930,940. The byte to be printed is PUSHed onto the stack while the modeflag is tested. If this is zero (MODE 3) the program continues and the byte PULLed from the stack for the character to be printed. If this is a CR (&0D) a jump is made to 'newl' line 1040. This calls osnewl (&FFE7) and then tests the value in skip. If this is zero the program returns to 'inc' line 1010 to return to the print loop. If skip is not zero, the program goes to 'skp' line 1050. The value in 'count', initially set to the value of 'lines', is decreased to count the number of lines tobe printed, returning to the print loop until count reaches zero. It is then loaded with the value in skiplines to count the number of times the loop 'skp1' is used to skip the perforations. The variable count is then loaded with the value of lines for printing the next page. 40 COLUMN PRINTING ~~~~~~~~~~~~~~~~~~ If MODE 6 is selected, the modeflag is not zero and a branch is made at line 950 to 'm6' (line 980). The character byte is PULLed from the stack and is first compared wih &0D (CR) and if equal a jump is made to test. This checks the following byte by increasing the index Y. If this is &7E (~), &0D (CR) or &20 (space) a jump to 'ok1', the index decreased and a CR character printed. If none of these are found, the index Y is decreased twice to point to the byte before. If this is &7E (~) or &0D (CR) a branch goes to 'ok2' the index Y increased and a CR printed. If a branch is not made the index Y increased and a space printed. This then prints the CR characters where it is needed for printing the headings and underlines but prints space instead of the others. The text is then printed using a word-wrapping routine. If the byte is a space (&20) a jump is made to the space routine (line 1060). This first checks the value in address &318 - the current text cursor X co-ordinate. If this is zero, the beginning of the line, the 'sp' routine line 1120 is called. This is a simple loop which checks for further spaces and loops back until another character is found before returning to the print routine. This left justifies all titles, etc which would otherwise be split. If the address &318 holds a value greater than zero, ie not the beginning of the line, the value is compared with the value loaded into A register in line 1060. If the carry flag is clear, ie the X co-ord less than 30, printing continues normally. When the carry flag is set, printing will continue until a space is found when a CR character is printed to start a new line.
00000000 20 0d 43 4f 44 45 35 20 2d 20 41 4e 20 45 58 50 | .CODE5 - AN EXP| 00000010 4c 41 4e 41 54 49 4f 4e 0d 7e 7e 7e 7e 7e 7e 7e |LANATION.~~~~~~~| 00000020 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 0d |~~~~~~~~~~~~~~~.| 00000030 28 6f 72 20 48 6f 77 20 45 55 47 20 74 69 63 6b |(or How EUG tick| 00000040 73 21 21 29 0d 42 79 20 52 69 63 68 61 72 64 20 |s!!).By Richard | 00000050 44 69 6d 6f 6e 64 0d 0d 53 69 6e 63 65 20 74 68 |Dimond..Since th| 00000060 65 20 41 73 73 65 6d 62 6c 65 72 20 66 6f 72 20 |e Assembler for | 00000070 6d 79 1a 20 6c 61 74 65 73 74 1a 20 63 6f 64 69 |my. latest. codi| 00000080 6e 67 20 66 6f 72 20 74 68 65 20 72 75 6e 6e 69 |ng for the runni| 00000090 6e 67 20 6f 66 20 45 55 47 20 68 61 73 20 62 65 |ng of EUG has be| 000000a0 65 6e 0d 70 75 62 6c 69 73 68 65 64 20 2c 20 49 |en.published , I| 000000b0 20 74 68 6f 75 67 68 74 20 74 68 61 74 20 69 74 | thought that it| 000000c0 20 77 61 73 20 74 69 6d 65 20 49 20 65 78 70 6c | was time I expl| 000000d0 61 69 6e 65 64 20 68 6f 77 20 69 74 20 77 6f 72 |ained how it wor| 000000e0 6b 73 2e 0d 0d 46 69 72 73 74 2c 20 49 20 77 69 |ks...First, I wi| 000000f0 6c 6c 20 67 69 76 65 20 61 20 62 72 69 65 66 20 |ll give a brief | 00000100 61 63 63 6f 75 6e 74 20 6f 66 20 69 74 73 20 64 |account of its d| 00000110 65 76 65 6c 6f 70 6d 65 6e 74 2e 0d 0d 57 68 65 |evelopment...Whe| 00000120 6e 20 45 55 47 20 66 69 72 73 74 20 61 70 70 65 |n EUG first appe| 00000130 61 72 65 64 1a 20 6f 6e 20 64 69 73 63 2c 20 74 |ared. on disc, t| 00000140 68 65 20 74 65 78 74 20 77 61 73 20 77 72 69 74 |he text was writ| 00000150 74 65 6e 20 69 6e 74 6f 20 42 41 53 49 43 20 70 |ten into BASIC p| 00000160 72 6f 67 72 61 6d 73 0d 61 6e 64 20 61 6c 6c 20 |rograms.and all | 00000170 74 65 78 74 20 66 69 6c 65 73 20 68 61 64 1a 20 |text files had. | 00000180 74 6f 1a 20 62 65 20 63 6f 6e 76 65 72 74 65 64 |to. be converted| 00000190 2e 20 20 54 6f 20 61 76 6f 69 64 20 74 68 69 73 |. To avoid this| 000001a0 2c 20 69 74 20 77 61 73 20 6e 65 63 65 73 73 61 |, it was necessa| 000001b0 72 79 0d 74 6f 20 66 69 6e 64 20 61 20 77 61 79 |ry.to find a way| 000001c0 20 74 6f 20 70 72 69 6e 74 20 61 20 74 65 78 74 | to print a text| 000001d0 20 66 69 6c 65 20 74 6f 20 73 63 72 65 65 6e 2e | file to screen.| 000001e0 0d 0d 50 72 6f 67 72 61 6d 73 20 6c 69 6b 65 20 |..Programs like | 000001f0 2a 54 59 50 45 20 77 65 72 65 20 6e 6f 74 20 73 |*TYPE were not s| 00000200 61 74 69 73 66 61 63 74 6f 72 79 20 73 69 6e 63 |atisfactory sinc| 00000210 65 20 74 68 65 20 56 69 65 77 20 63 6f 6e 74 72 |e the View contr| 00000220 6f 6c 20 63 6f 64 65 73 20 28 31 36 0d 26 20 32 |ol codes (16.& 2| 00000230 36 29 20 66 6f 72 20 66 6f 72 6d 61 74 74 69 6e |6) for formattin| 00000240 67 20 63 61 75 73 65 64 1a 20 70 72 6f 62 6c 65 |g caused. proble| 00000250 6d 73 2e 20 20 41 6c 73 6f 20 74 68 65 20 64 69 |ms. Also the di| 00000260 73 63 20 77 61 73 20 72 65 61 64 20 64 69 72 65 |sc was read dire| 00000270 63 74 20 77 69 74 68 0d 74 68 65 20 74 65 78 74 |ct with.the text| 00000280 20 6c 6f 61 64 65 64 20 69 6e 20 32 35 36 1a 20 | loaded in 256. | 00000290 62 79 74 65 1a 20 62 6c 6f 63 6b 73 20 77 68 69 |byte. blocks whi| 000002a0 63 68 20 63 61 75 73 65 64 20 61 20 6c 6f 74 20 |ch caused a lot | 000002b0 6f 66 20 73 63 72 65 65 6e 20 66 6c 61 73 68 69 |of screen flashi| 000002c0 6e 67 0d 69 6e 20 4d 4f 44 45 33 2e 0d 0d 49 20 |ng.in MODE3...I | 000002d0 64 65 63 69 64 65 64 20 74 68 61 74 20 74 68 65 |decided that the| 000002e0 20 66 69 6c 65 73 20 73 68 6f 75 6c 64 20 62 65 | files should be| 000002f0 20 4c 4f 41 44 65 64 1a 20 69 6e 74 6f 20 6d 65 | LOADed. into me| 00000300 6d 6f 72 79 20 69 6e 20 4d 4f 44 45 36 20 77 69 |mory in MODE6 wi| 00000310 74 68 20 48 49 4d 45 4d 0d 6c 6f 77 65 72 65 64 |th HIMEM.lowered| 00000320 2e 20 20 54 68 65 20 74 65 78 74 20 63 6f 75 6c |. The text coul| 00000330 64 20 74 68 65 6e 20 62 65 20 72 65 61 64 20 74 |d then be read t| 00000340 6f 20 73 63 72 65 65 6e 1a 20 69 6e 1a 20 4d 4f |o screen. in. MO| 00000350 44 45 33 2c 1a 20 20 69 67 6e 6f 72 69 6e 67 20 |DE3,. ignoring | 00000360 74 68 65 0d 66 6f 72 6d 61 74 74 69 6e 67 1a 20 |the.formatting. | 00000370 62 79 74 65 73 2e 20 20 54 68 69 73 1a 20 70 72 |bytes. This. pr| 00000380 69 6e 74 73 20 74 68 65 20 74 65 78 74 20 61 73 |ints the text as| 00000390 20 69 66 20 75 6e 66 6f 72 6d 61 74 74 65 64 20 | if unformatted | 000003a0 61 6e 64 20 61 76 6f 69 64 73 20 74 68 65 0d 66 |and avoids the.f| 000003b0 6c 61 73 68 69 6e 67 20 6f 66 20 74 68 65 20 73 |lashing of the s| 000003c0 63 72 65 65 6e 2e 0d 0d 41 74 20 66 69 72 73 74 |creen...At first| 000003d0 20 74 68 69 73 20 77 61 73 20 64 6f 6e 65 20 77 | this was done w| 000003e0 69 74 68 20 61 20 73 68 6f 72 74 20 42 41 53 49 |ith a short BASI| 000003f0 43 20 72 6f 75 74 69 6e 65 20 61 64 64 65 64 20 |C routine added | 00000400 74 6f 1a 20 74 68 65 1a 20 6d 65 6e 75 1a 20 62 |to. the. menu. b| 00000410 75 74 0d 6c 61 74 65 72 20 49 20 6d 61 64 65 20 |ut.later I made | 00000420 75 70 20 61 20 73 69 6d 70 6c 65 20 4d 2f 63 6f |up a simple M/co| 00000430 64 65 20 72 6f 75 74 69 6e 65 20 74 6f 20 64 6f |de routine to do| 00000440 20 74 68 69 73 2e 0d 0d 57 68 65 6e 1a 20 74 68 | this...When. th| 00000450 65 1a 20 71 75 65 73 74 69 6f 6e 20 6f 66 20 34 |e. question of 4| 00000460 30 20 63 6f 6c 75 6d 6e 20 70 72 69 6e 74 69 6e |0 column printin| 00000470 67 20 77 61 73 20 61 73 6b 65 64 20 66 6f 72 2c |g was asked for,| 00000480 20 49 20 61 67 61 69 6e 20 69 6e 69 74 69 61 6c | I again initial| 00000490 6c 79 0d 6d 61 64 65 20 61 20 42 41 53 49 43 1a |ly.made a BASIC.| 000004a0 20 6c 69 73 74 69 6e 67 1a 20 61 73 1a 20 62 65 | listing. as. be| 000004b0 66 6f 72 65 2e 1a 20 20 54 68 69 73 1a 20 77 61 |fore.. This. wa| 000004c0 73 1a 20 61 6c 73 6f 1a 20 66 6f 6c 6c 6f 77 65 |s. also. followe| 000004d0 64 1a 20 62 79 20 61 20 63 6f 64 65 64 0d 76 65 |d. by a coded.ve| 000004e0 72 73 69 6f 6e 2e 0d 0d 47 75 73 20 68 61 64 20 |rsion...Gus had | 000004f0 61 6c 73 6f 20 61 73 6b 65 64 20 6d 65 1a 20 77 |also asked me. w| 00000500 68 65 74 68 65 72 1a 20 69 74 1a 20 77 6f 75 6c |hether. it. woul| 00000510 64 1a 20 62 65 1a 20 70 6f 73 73 69 62 6c 65 1a |d. be. possible.| 00000520 20 74 6f 20 20 70 72 6f 76 69 64 65 20 66 6f 72 | to provide for| 00000530 20 61 0d 64 69 66 66 65 72 65 6e 74 20 74 79 70 | a.different typ| 00000540 65 20 6f 66 20 70 72 69 6e 74 69 6e 67 20 73 6f |e of printing so| 00000550 20 74 68 61 74 20 68 65 20 6e 65 65 64 20 6e 6f | that he need no| 00000560 74 20 75 73 65 20 63 61 70 69 74 61 6c 73 1a 20 |t use capitals. | 00000570 6f 6e 6c 79 2e 1a 20 20 41 66 74 65 72 0d 6d 75 |only.. After.mu| 00000580 63 68 20 74 68 6f 75 67 68 74 20 49 20 6d 61 64 |ch thought I mad| 00000590 65 20 75 70 20 43 4f 44 45 34 20 77 68 69 63 68 |e up CODE4 which| 000005a0 20 68 61 73 20 62 65 65 6e 20 75 73 65 64 20 66 | has been used f| 000005b0 6f 72 20 73 6f 6d 65 20 74 69 6d 65 20 6e 6f 77 |or some time now| 000005c0 2e 20 20 20 54 68 69 73 0d 61 6c 73 6f 20 69 6e |. This.also in| 000005d0 63 6c 75 64 65 64 20 74 68 65 20 70 65 72 66 6f |cluded the perfo| 000005e0 72 61 74 69 6f 6e 20 73 6b 69 70 20 72 6f 75 74 |ration skip rout| 000005f0 69 6e 65 20 77 68 69 63 68 20 68 61 64 20 61 6c |ine which had al| 00000600 73 6f 20 62 65 65 6e 20 61 73 6b 65 64 20 66 6f |so been asked fo| 00000610 72 2e 0d 0d 53 69 6e 63 65 20 49 20 67 6f 74 20 |r...Since I got | 00000620 6d 79 20 4d 61 73 74 65 72 2c 20 49 20 72 65 61 |my Master, I rea| 00000630 6c 69 73 65 64 20 74 68 61 74 1a 20 74 68 65 1a |lised that. the.| 00000640 20 64 69 66 66 65 72 65 6e 74 20 73 74 79 6c 65 | different style| 00000650 73 20 6f 66 20 70 72 69 6e 74 20 64 69 64 0d 6e |s of print did.n| 00000660 6f 74 20 77 6f 72 6b 20 6f 6e 20 74 68 65 20 4d |ot work on the M| 00000670 61 73 74 65 72 20 61 73 20 43 48 52 24 32 35 35 |aster as CHR$255| 00000680 1a 20 75 73 65 64 1a 20 62 79 20 74 68 65 20 72 |. used. by the r| 00000690 6f 75 74 69 6e 65 20 70 72 69 6e 74 73 20 61 6e |outine prints an| 000006a0 20 69 6e 76 65 72 74 65 64 0d 73 70 61 63 65 2e | inverted.space.| 000006b0 20 20 53 6f 20 49 20 68 61 76 65 20 61 64 64 65 | So I have adde| 000006c0 64 1a 20 61 1a 20 73 68 6f 72 74 1a 20 72 6f 75 |d. a. short. rou| 000006d0 74 69 6e 65 20 77 68 69 63 68 20 73 65 74 73 20 |tine which sets | 000006e0 75 70 20 74 68 65 20 6e 65 77 20 63 68 61 72 61 |up the new chara| 000006f0 63 74 65 72 0d 75 73 69 6e 67 20 56 44 55 32 33 |cter.using VDU23| 00000700 20 61 73 20 72 65 71 75 69 72 65 64 20 77 69 74 | as required wit| 00000710 68 20 74 68 65 20 4d 61 73 74 65 72 20 61 6e 64 |h the Master and| 00000720 1a 20 72 65 6e 61 6d 65 64 20 74 68 65 20 63 6f |. renamed the co| 00000730 64 65 20 43 4f 44 45 35 2e 20 20 54 68 69 73 0d |de CODE5. This.| 00000740 6d 61 64 65 1a 20 69 74 20 6e 65 63 65 73 73 61 |made. it necessa| 00000750 72 79 20 74 6f 20 6d 61 6b 65 20 61 20 73 6d 61 |ry to make a sma| 00000760 6c 6c 20 63 68 61 6e 67 65 20 74 6f 1a 20 56 2d |ll change to. V-| 00000770 54 59 50 45 1a 20 61 6e 64 1a 20 73 6f 1a 20 69 |TYPE. and. so. i| 00000780 74 1a 20 69 73 1a 20 6e 6f 77 0d 56 54 59 50 45 |t. is. now.VTYPE| 00000790 35 2e 0d 0d 49 1a 20 6d 61 64 65 1a 20 75 70 1a |5...I. made. up.| 000007a0 20 74 68 69 73 20 6c 69 74 74 6c 65 20 70 72 6f | this little pro| 000007b0 67 72 61 6d 20 73 6f 20 74 68 61 74 20 79 6f 75 |gram so that you| 000007c0 20 63 6f 75 6c 64 20 73 65 65 20 68 6f 77 20 79 | could see how y| 000007d0 6f 75 72 20 74 65 78 74 20 66 69 6c 65 73 0d 77 |our text files.w| 000007e0 6f 75 6c 64 20 61 70 70 65 61 72 20 69 6e 20 74 |ould appear in t| 000007f0 68 65 20 6d 61 67 2e 20 20 49 20 66 6f 75 6e 64 |he mag. I found| 00000800 1a 20 74 68 61 74 1a 20 74 68 65 20 76 65 72 73 |. that. the vers| 00000810 69 6f 6e 20 6f 6e 20 45 55 47 32 36 20 77 61 73 |ion on EUG26 was| 00000820 20 61 6e 20 65 61 72 6c 79 0d 6f 6e 65 20 61 6e | an early.one an| 00000830 64 20 49 20 68 61 64 20 73 69 6e 63 65 20 6d 6f |d I had since mo| 00000840 64 69 66 69 65 64 20 74 68 69 73 20 73 6f 20 74 |dified this so t| 00000850 68 61 74 1a 20 79 6f 75 1a 20 63 6f 75 6c 64 1a |hat. you. could.| 00000860 20 61 6c 74 65 72 1a 20 48 49 4d 45 4d 20 69 66 | alter. HIMEM if| 00000870 20 79 6f 75 0d 77 69 73 68 2e 1a 20 20 4f 6e 1a | you.wish.. On.| 00000880 20 64 65 66 61 75 6c 74 1a 20 69 74 20 77 69 6c | default. it wil| 00000890 6c 20 65 6e 74 65 72 20 26 32 36 30 30 20 61 73 |l enter &2600 as| 000008a0 20 6f 6e 20 74 68 65 20 64 69 73 63 73 2e 20 20 | on the discs. | 000008b0 54 68 69 73 20 76 65 72 73 69 6f 6e 20 69 73 0d |This version is.| 000008c0 6e 6f 77 20 6f 6e 20 74 68 69 73 20 64 69 73 63 |now on this disc| 000008d0 2e 0d 0d 50 52 4f 47 52 41 4d 20 4f 50 45 52 41 |...PROGRAM OPERA| 000008e0 54 49 4f 4e 0d 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e |TION.~~~~~~~~~~~| 000008f0 7e 7e 7e 7e 7e 7e 0d 54 68 65 20 70 72 6f 67 72 |~~~~~~.The progr| 00000900 61 6d 20 72 65 61 64 73 20 74 68 65 20 76 61 6c |am reads the val| 00000910 75 65 20 6f 66 20 48 49 4d 45 4d 20 61 6e 64 20 |ue of HIMEM and | 00000920 74 68 69 73 20 6d 75 73 74 20 62 65 20 73 65 74 |this must be set| 00000930 20 74 6f 20 61 20 6c 6f 77 65 72 20 76 61 6c 75 | to a lower valu| 00000940 65 0d 62 65 66 6f 72 65 20 74 68 65 20 63 6f 64 |e.before the cod| 00000950 65 20 69 73 20 75 73 65 64 2e 20 20 0d 0d 4c 69 |e is used. ..Li| 00000960 6e 65 73 20 39 30 20 2d 31 32 30 20 73 65 74 20 |nes 90 -120 set | 00000970 75 70 20 74 68 65 20 76 61 72 69 61 62 6c 65 20 |up the variable | 00000980 61 64 64 72 65 73 73 65 73 20 61 6e 64 20 6c 69 |addresses and li| 00000990 6e 65 73 20 31 33 30 20 2d 20 31 35 30 20 73 65 |nes 130 - 150 se| 000009a0 74 20 75 70 20 74 68 65 0d 70 72 69 6e 74 65 72 |t up the.printer| 000009b0 20 63 6f 64 65 73 2e 0d 0d 54 68 65 20 72 6f 75 | codes...The rou| 000009c0 74 69 6e 65 20 27 63 6c 65 61 72 27 2c 20 6c 69 |tine 'clear', li| 000009d0 6e 65 73 1a 20 31 39 30 1a 2d 20 32 38 30 1a 20 |nes. 190.- 280. | 000009e0 69 73 20 61 20 73 69 6d 70 6c 65 20 6c 6f 6f 70 |is a simple loop| 000009f0 20 77 68 69 63 68 20 6c 6f 61 64 73 20 61 20 7a | which loads a z| 00000a00 65 72 6f 0d 69 6e 74 6f 20 61 6c 6c 20 62 79 74 |ero.into all byt| 00000a10 65 73 20 66 72 6f 6d 20 48 49 4d 45 4d 20 75 70 |es from HIMEM up| 00000a20 20 74 6f 20 74 68 65 20 73 63 72 65 65 6e 20 73 | to the screen s| 00000a30 74 61 72 74 20 61 64 64 72 65 73 73 20 28 26 34 |tart address (&4| 00000a40 30 30 30 20 69 6e 20 4d 4f 44 45 33 29 2e 0d 54 |000 in MODE3)..T| 00000a50 68 69 73 20 69 73 20 6e 65 63 65 73 73 61 72 79 |his is necessary| 00000a60 20 61 73 20 49 1a 20 66 6f 75 6e 64 1a 20 74 68 | as I. found. th| 00000a70 61 74 20 74 68 65 20 65 61 73 69 65 73 74 20 77 |at the easiest w| 00000a80 61 79 20 74 6f 20 66 69 6e 64 20 74 68 65 20 65 |ay to find the e| 00000a90 6e 64 20 6f 66 20 74 68 65 0d 66 69 6c 65 20 77 |nd of the.file w| 00000aa0 61 73 20 74 6f 20 63 68 65 63 6b 20 66 6f 72 20 |as to check for | 00000ab0 61 20 7a 65 72 6f 20 62 79 74 65 2e 0d 0d 54 68 |a zero byte...Th| 00000ac0 65 1a 20 61 73 73 65 6d 62 6c 79 1a 20 6f 66 1a |e. assembly. of.| 00000ad0 20 74 68 65 1a 20 70 72 69 6e 74 1a 20 72 6f 75 | the. print. rou| 00000ae0 74 69 6e 65 1a 20 73 74 61 72 74 73 20 61 74 20 |tine. starts at | 00000af0 6c 69 6e 65 20 37 37 30 2e 20 20 54 68 65 20 74 |line 770. The t| 00000b00 77 6f 20 66 6c 61 67 73 0d 28 62 64 66 6c 67 20 |wo flags.(bdflg | 00000b10 26 20 69 74 66 6c 67 29 20 66 6f 72 20 74 68 65 |& itflg) for the| 00000b20 20 74 77 6f 20 68 69 67 68 6c 69 67 68 74 73 1a | two highlights.| 00000b30 20 61 72 65 20 73 65 74 20 74 6f 20 7a 65 72 6f | are set to zero| 00000b40 20 28 6f 66 66 29 20 61 74 20 6c 69 6e 65 20 37 | (off) at line 7| 00000b50 37 35 2e 0d 0d 4c 69 6e 65 20 37 38 30 20 69 73 |75...Line 780 is| 00000b60 20 65 71 75 69 76 61 6c 65 6e 74 20 6f 66 20 2a | equivalent of *| 00000b70 46 58 31 33 35 20 77 68 69 63 68 20 72 65 74 75 |FX135 which retu| 00000b80 72 6e 73 1a 20 74 68 65 1a 20 4d 4f 44 45 1a 20 |rns. the. MODE. | 00000b90 6e 75 6d 62 65 72 1a 20 69 6e 74 6f 1a 20 59 0d |number. into. Y.| 00000ba0 72 65 67 69 73 74 65 72 2e 1a 20 20 54 68 69 73 |register.. This| 00000bb0 1a 20 69 73 1a 20 63 6f 6d 70 61 72 65 64 1a 20 |. is. compared. | 00000bc0 77 69 74 68 20 33 20 61 6e 64 20 69 66 20 65 71 |with 3 and if eq| 00000bd0 75 61 6c 20 74 68 65 20 6d 6f 64 65 66 6c 61 67 |ual the modeflag| 00000be0 20 69 73 20 73 65 74 20 74 6f 0d 7a 65 72 6f 2c | is set to.zero,| 00000bf0 20 69 66 20 6e 6f 74 20 69 74 20 69 73 20 73 65 | if not it is se| 00000c00 74 20 74 6f 20 32 35 35 28 2d 31 29 20 74 6f 20 |t to 255(-1) to | 00000c10 69 6e 64 69 63 61 74 65 20 4d 4f 44 45 20 36 20 |indicate MODE 6 | 00000c20 28 6c 69 6e 65 73 20 37 39 30 20 2d 38 31 30 29 |(lines 790 -810)| 00000c30 2e 20 20 0d 0d 4c 69 6e 65 20 38 32 30 20 69 73 |. ..Line 820 is| 00000c40 20 61 6e 6f 74 68 65 72 20 2a 46 58 1a 20 63 61 | another *FX. ca| 00000c50 6c 6c 1a 20 28 31 31 37 29 2e 1a 20 20 54 68 69 |ll. (117).. Thi| 00000c60 73 1a 20 73 65 74 73 20 62 69 74 20 30 20 69 66 |s. sets bit 0 if| 00000c70 20 74 68 65 20 70 72 69 6e 74 65 72 20 69 73 0d | the printer is.| 00000c80 65 6e 61 62 6c 65 64 20 61 6e 64 20 74 68 69 73 |enabled and this| 00000c90 20 69 73 20 72 65 61 64 1a 20 62 79 1a 20 41 4e | is read. by. AN| 00000ca0 44 69 6e 67 1a 20 77 69 74 68 1a 20 31 2e 1a 20 |Ding. with. 1.. | 00000cb0 20 54 68 69 73 1a 20 73 65 74 73 1a 20 27 70 72 | This. sets. 'pr| 00000cc0 74 66 6c 67 27 20 74 6f 20 30 0d 28 70 72 69 6e |tflg' to 0.(prin| 00000cd0 74 65 72 20 6f 66 66 29 20 6f 72 20 31 20 28 70 |ter off) or 1 (p| 00000ce0 72 69 6e 74 65 72 20 65 6e 61 62 6c 65 64 29 2e |rinter enabled).| 00000cf0 0d 0d 49 67 6e 6f 72 69 6e 67 20 74 68 65 20 69 |..Ignoring the i| 00000d00 6e 73 74 72 75 63 74 69 6f 6e 20 69 6e 20 6c 69 |nstruction in li| 00000d10 6e 65 20 38 35 30 20 66 6f 72 20 74 68 65 1a 20 |ne 850 for the. | 00000d20 6d 6f 6d 65 6e 74 2c 1a 20 6c 69 6e 65 73 20 38 |moment,. lines 8| 00000d30 36 30 20 26 20 38 37 30 20 73 65 74 0d 74 68 65 |60 & 870 set.the| 00000d40 20 61 64 64 72 65 73 73 20 69 6e 20 26 37 30 2c | address in &70,| 00000d50 37 31 20 74 6f 20 48 49 4d 45 4d 2e 20 20 54 68 |71 to HIMEM. Th| 00000d60 65 20 70 72 69 6e 74 20 6c 6f 6f 70 20 69 73 1a |e print loop is.| 00000d70 20 61 73 73 65 6d 62 6c 65 64 20 69 6e 20 6c 69 | assembled in li| 00000d80 6e 65 73 20 38 38 30 0d 2d 20 39 37 30 2e 20 4c |nes 880.- 970. L| 00000d90 69 6e 65 20 39 30 30 20 72 65 74 75 72 6e 73 20 |ine 900 returns | 00000da0 74 6f 20 42 41 53 49 43 20 69 66 20 7a 65 72 6f |to BASIC if zero| 00000db0 20 62 79 74 65 20 66 6f 75 6e 64 20 28 65 6e 64 | byte found (end| 00000dc0 20 6f 66 20 66 69 6c 65 29 2e 0d 0d 4c 69 6e 65 | of file)...Line| 00000dd0 73 20 39 31 30 2c 39 32 30 20 74 6f 67 67 6c 65 |s 910,920 toggle| 00000de0 20 74 68 65 20 68 69 67 68 6c 69 67 68 74 1a 20 | the highlight. | 00000df0 66 6c 61 67 73 20 69 66 20 74 68 65 20 56 69 65 |flags if the Vie| 00000e00 77 20 63 6f 64 65 73 20 26 31 43 20 6f 72 20 26 |w codes &1C or &| 00000e10 31 44 20 61 72 65 0d 66 6f 75 6e 64 20 66 6f 72 |1D are.found for| 00000e20 20 62 6f 6c 64 20 6f 72 20 69 74 61 6c 69 63 20 | bold or italic | 00000e30 70 72 69 6e 74 69 6e 67 1a 20 61 6e 64 20 74 68 |printing. and th| 00000e40 65 20 66 6f 72 6d 61 74 74 69 6e 67 20 63 6f 64 |e formatting cod| 00000e50 65 73 20 61 72 65 20 73 6b 69 70 70 65 64 20 61 |es are skipped a| 00000e60 74 0d 6c 69 6e 65 73 20 39 33 30 2c 39 34 30 2e |t.lines 930,940.| 00000e70 20 20 0d 20 0d 54 68 65 20 62 79 74 65 20 74 6f | . .The byte to| 00000e80 20 62 65 20 70 72 69 6e 74 65 64 1a 20 69 73 1a | be printed. is.| 00000e90 20 50 55 53 48 65 64 1a 20 6f 6e 74 6f 1a 20 74 | PUSHed. onto. t| 00000ea0 68 65 1a 20 73 74 61 63 6b 20 77 68 69 6c 65 20 |he. stack while | 00000eb0 74 68 65 20 6d 6f 64 65 66 6c 61 67 20 69 73 0d |the modeflag is.| 00000ec0 74 65 73 74 65 64 2e 20 20 49 66 20 74 68 69 73 |tested. If this| 00000ed0 20 69 73 20 7a 65 72 6f 1a 20 28 4d 4f 44 45 1a | is zero. (MODE.| 00000ee0 20 33 29 1a 20 74 68 65 1a 20 70 72 6f 67 72 61 | 3). the. progra| 00000ef0 6d 1a 20 63 6f 6e 74 69 6e 75 65 73 1a 20 61 6e |m. continues. an| 00000f00 64 20 74 68 65 20 62 79 74 65 0d 50 55 4c 4c 65 |d the byte.PULLe| 00000f10 64 20 66 72 6f 6d 20 74 68 65 20 73 74 61 63 6b |d from the stack| 00000f20 20 66 6f 72 20 74 68 65 20 63 68 61 72 61 63 74 | for the charact| 00000f30 65 72 20 74 6f 20 62 65 20 70 72 69 6e 74 65 64 |er to be printed| 00000f40 2e 0d 0d 49 66 20 74 68 69 73 20 69 73 20 61 20 |...If this is a | 00000f50 43 52 1a 20 28 26 30 44 29 1a 20 61 1a 20 20 6a |CR. (&0D). a. j| 00000f60 75 6d 70 1a 20 69 73 20 6d 61 64 65 20 74 6f 20 |ump. is made to | 00000f70 27 6e 65 77 6c 27 20 6c 69 6e 65 20 31 30 34 30 |'newl' line 1040| 00000f80 2e 20 20 54 68 69 73 20 63 61 6c 6c 73 0d 6f 73 |. This calls.os| 00000f90 6e 65 77 6c 20 28 26 46 46 45 37 29 20 61 6e 64 |newl (&FFE7) and| 00000fa0 20 74 68 65 6e 20 74 65 73 74 73 20 74 68 65 20 | then tests the | 00000fb0 76 61 6c 75 65 20 69 6e 20 73 6b 69 70 2e 1a 20 |value in skip.. | 00000fc0 20 49 66 1a 20 74 68 69 73 1a 20 69 73 1a 20 7a | If. this. is. z| 00000fd0 65 72 6f 1a 20 74 68 65 0d 70 72 6f 67 72 61 6d |ero. the.program| 00000fe0 20 72 65 74 75 72 6e 73 20 74 6f 20 27 69 6e 63 | returns to 'inc| 00000ff0 27 20 6c 69 6e 65 20 31 30 31 30 20 74 6f 20 72 |' line 1010 to r| 00001000 65 74 75 72 6e 20 74 6f 20 74 68 65 20 70 72 69 |eturn to the pri| 00001010 6e 74 20 6c 6f 6f 70 2e 0d 0d 49 66 20 73 6b 69 |nt loop...If ski| 00001020 70 20 69 73 20 6e 6f 74 20 7a 65 72 6f 2c 20 74 |p is not zero, t| 00001030 68 65 20 70 72 6f 67 72 61 6d 20 67 6f 65 73 20 |he program goes | 00001040 74 6f 20 27 73 6b 70 27 20 6c 69 6e 65 20 31 30 |to 'skp' line 10| 00001050 35 30 2e 1a 20 20 54 68 65 1a 20 76 61 6c 75 65 |50.. The. value| 00001060 1a 20 69 6e 0d 27 63 6f 75 6e 74 27 2c 1a 20 69 |. in.'count',. i| 00001070 6e 69 74 69 61 6c 6c 79 20 73 65 74 20 74 6f 20 |nitially set to | 00001080 74 68 65 20 76 61 6c 75 65 20 6f 66 20 27 6c 69 |the value of 'li| 00001090 6e 65 73 27 2c 20 69 73 20 64 65 63 72 65 61 73 |nes', is decreas| 000010a0 65 64 20 74 6f 20 63 6f 75 6e 74 20 74 68 65 0d |ed to count the.| 000010b0 6e 75 6d 62 65 72 20 6f 66 1a 20 6c 69 6e 65 73 |number of. lines| 000010c0 1a 20 74 6f 1a 62 65 1a 20 70 72 69 6e 74 65 64 |. to.be. printed| 000010d0 2c 1a 20 72 65 74 75 72 6e 69 6e 67 20 74 6f 20 |,. returning to | 000010e0 74 68 65 20 70 72 69 6e 74 20 6c 6f 6f 70 20 75 |the print loop u| 000010f0 6e 74 69 6c 20 63 6f 75 6e 74 0d 72 65 61 63 68 |ntil count.reach| 00001100 65 73 20 7a 65 72 6f 2e 20 20 49 74 20 69 73 20 |es zero. It is | 00001110 74 68 65 6e 20 20 6c 6f 61 64 65 64 20 77 69 74 |then loaded wit| 00001120 68 20 74 68 65 20 76 61 6c 75 65 20 69 6e 20 73 |h the value in s| 00001130 6b 69 70 6c 69 6e 65 73 20 74 6f 20 63 6f 75 6e |kiplines to coun| 00001140 74 20 74 68 65 0d 6e 75 6d 62 65 72 20 6f 66 20 |t the.number of | 00001150 74 69 6d 65 73 20 74 68 65 20 6c 6f 6f 70 20 27 |times the loop '| 00001160 73 6b 70 31 27 20 69 73 1a 20 75 73 65 64 1a 20 |skp1' is. used. | 00001170 74 6f 1a 20 73 6b 69 70 1a 20 74 68 65 20 70 65 |to. skip. the pe| 00001180 72 66 6f 72 61 74 69 6f 6e 73 2e 20 20 54 68 65 |rforations. The| 00001190 0d 76 61 72 69 61 62 6c 65 1a 20 63 6f 75 6e 74 |.variable. count| 000011a0 1a 20 69 73 20 74 68 65 6e 20 6c 6f 61 64 65 64 |. is then loaded| 000011b0 20 77 69 74 68 20 74 68 65 20 76 61 6c 75 65 20 | with the value | 000011c0 6f 66 20 6c 69 6e 65 73 20 66 6f 72 1a 20 70 72 |of lines for. pr| 000011d0 69 6e 74 69 6e 67 1a 20 74 68 65 0d 6e 65 78 74 |inting. the.next| 000011e0 20 70 61 67 65 2e 0d 0d 34 30 20 43 4f 4c 55 4d | page...40 COLUM| 000011f0 4e 20 50 52 49 4e 54 49 4e 47 0d 7e 7e 7e 7e 7e |N PRINTING.~~~~~| 00001200 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 7e 0d 49 66 |~~~~~~~~~~~~~.If| 00001210 20 4d 4f 44 45 20 36 20 69 73 20 73 65 6c 65 63 | MODE 6 is selec| 00001220 74 65 64 2c 1a 20 74 68 65 1a 20 6d 6f 64 65 66 |ted,. the. modef| 00001230 6c 61 67 1a 20 69 73 20 6e 6f 74 20 7a 65 72 6f |lag. is not zero| 00001240 20 61 6e 64 20 61 20 62 72 61 6e 63 68 20 69 73 | and a branch is| 00001250 20 6d 61 64 65 20 61 74 0d 6c 69 6e 65 20 39 35 | made at.line 95| 00001260 30 20 74 6f 20 27 6d 36 27 20 28 6c 69 6e 65 20 |0 to 'm6' (line | 00001270 39 38 30 29 2e 20 20 54 68 65 20 63 68 61 72 61 |980). The chara| 00001280 63 74 65 72 1a 20 62 79 74 65 20 69 73 20 50 55 |cter. byte is PU| 00001290 4c 4c 65 64 20 66 72 6f 6d 20 74 68 65 20 73 74 |LLed from the st| 000012a0 61 63 6b 0d 61 6e 64 20 69 73 20 66 69 72 73 74 |ack.and is first| 000012b0 20 63 6f 6d 70 61 72 65 64 20 77 69 68 20 26 30 | compared wih &0| 000012c0 44 20 28 43 52 29 20 61 6e 64 20 69 66 1a 20 65 |D (CR) and if. e| 000012d0 71 75 61 6c 1a 20 61 1a 20 6a 75 6d 70 20 69 73 |qual. a. jump is| 000012e0 20 6d 61 64 65 20 74 6f 20 74 65 73 74 2e 20 0d | made to test. .| 000012f0 54 68 69 73 20 63 68 65 63 6b 73 20 74 68 65 20 |This checks the | 00001300 66 6f 6c 6c 6f 77 69 6e 67 20 62 79 74 65 20 62 |following byte b| 00001310 79 20 69 6e 63 72 65 61 73 69 6e 67 20 74 68 65 |y increasing the| 00001320 20 69 6e 64 65 78 20 59 2e 20 20 49 66 20 74 68 | index Y. If th| 00001330 69 73 1a 20 69 73 20 26 37 45 0d 28 7e 29 2c 20 |is. is &7E.(~), | 00001340 26 30 44 20 28 43 52 29 20 6f 72 20 26 32 30 20 |&0D (CR) or &20 | 00001350 28 73 70 61 63 65 29 20 61 20 6a 75 6d 70 20 74 |(space) a jump t| 00001360 6f 20 27 6f 6b 31 27 2c 20 74 68 65 20 69 6e 64 |o 'ok1', the ind| 00001370 65 78 20 64 65 63 72 65 61 73 65 64 20 61 6e 64 |ex decreased and| 00001380 20 61 20 43 52 0d 63 68 61 72 61 63 74 65 72 1a | a CR.character.| 00001390 20 70 72 69 6e 74 65 64 2e 1a 20 20 49 66 20 6e | printed.. If n| 000013a0 6f 6e 65 20 6f 66 20 74 68 65 73 65 20 61 72 65 |one of these are| 000013b0 20 66 6f 75 6e 64 2c 20 74 68 65 20 69 6e 64 65 | found, the inde| 000013c0 78 20 59 20 69 73 20 64 65 63 72 65 61 73 65 64 |x Y is decreased| 000013d0 0d 74 77 69 63 65 20 74 6f 20 70 6f 69 6e 74 1a |.twice to point.| 000013e0 20 74 6f 1a 20 74 68 65 1a 20 62 79 74 65 1a 20 | to. the. byte. | 000013f0 62 65 66 6f 72 65 2e 1a 20 20 49 66 1a 20 74 68 |before.. If. th| 00001400 69 73 20 69 73 20 26 37 45 20 28 7e 29 20 6f 72 |is is &7E (~) or| 00001410 20 26 30 44 20 28 43 52 29 20 61 0d 62 72 61 6e | &0D (CR) a.bran| 00001420 63 68 20 67 6f 65 73 20 74 6f 20 27 6f 6b 32 27 |ch goes to 'ok2'| 00001430 20 74 68 65 20 69 6e 64 65 78 20 59 20 69 6e 63 | the index Y inc| 00001440 72 65 61 73 65 64 20 61 6e 64 1a 20 61 20 43 52 |reased and. a CR| 00001450 20 70 72 69 6e 74 65 64 2e 20 20 49 66 20 61 20 | printed. If a | 00001460 62 72 61 6e 63 68 0d 69 73 20 6e 6f 74 20 6d 61 |branch.is not ma| 00001470 64 65 20 74 68 65 20 69 6e 64 65 78 20 59 20 69 |de the index Y i| 00001480 6e 63 72 65 61 73 65 64 20 61 6e 64 20 61 20 73 |ncreased and a s| 00001490 70 61 63 65 20 70 72 69 6e 74 65 64 2e 20 20 0d |pace printed. .| 000014a0 0d 54 68 69 73 20 74 68 65 6e 20 70 72 69 6e 74 |.This then print| 000014b0 73 20 74 68 65 20 43 52 1a 20 63 68 61 72 61 63 |s the CR. charac| 000014c0 74 65 72 73 1a 20 77 68 65 72 65 1a 20 69 74 1a |ters. where. it.| 000014d0 20 69 73 20 6e 65 65 64 65 64 20 66 6f 72 20 70 | is needed for p| 000014e0 72 69 6e 74 69 6e 67 20 74 68 65 0d 68 65 61 64 |rinting the.head| 000014f0 69 6e 67 73 20 61 6e 64 20 75 6e 64 65 72 6c 69 |ings and underli| 00001500 6e 65 73 20 62 75 74 20 70 72 69 6e 74 73 20 73 |nes but prints s| 00001510 70 61 63 65 20 69 6e 73 74 65 61 64 20 6f 66 20 |pace instead of | 00001520 74 68 65 20 6f 74 68 65 72 73 2e 0d 0d 54 68 65 |the others...The| 00001530 1a 20 74 65 78 74 20 69 73 20 74 68 65 6e 20 70 |. text is then p| 00001540 72 69 6e 74 65 64 20 75 73 69 6e 67 20 61 20 77 |rinted using a w| 00001550 6f 72 64 2d 77 72 61 70 70 69 6e 67 20 72 6f 75 |ord-wrapping rou| 00001560 74 69 6e 65 2e 20 20 49 66 20 74 68 65 20 62 79 |tine. If the by| 00001570 74 65 20 69 73 20 61 0d 73 70 61 63 65 20 28 26 |te is a.space (&| 00001580 32 30 29 1a 20 61 1a 20 6a 75 6d 70 20 69 73 20 |20). a. jump is | 00001590 6d 61 64 65 20 74 6f 20 74 68 65 20 73 70 61 63 |made to the spac| 000015a0 65 20 72 6f 75 74 69 6e 65 20 28 6c 69 6e 65 20 |e routine (line | 000015b0 31 30 36 30 29 2e 20 20 54 68 69 73 20 66 69 72 |1060). This fir| 000015c0 73 74 0d 63 68 65 63 6b 73 20 74 68 65 20 76 61 |st.checks the va| 000015d0 6c 75 65 20 69 6e 1a 20 61 64 64 72 65 73 73 20 |lue in. address | 000015e0 26 33 31 38 20 2d 20 74 68 65 20 63 75 72 72 65 |&318 - the curre| 000015f0 6e 74 20 74 65 78 74 20 63 75 72 73 6f 72 20 58 |nt text cursor X| 00001600 20 63 6f 2d 6f 72 64 69 6e 61 74 65 2e 20 0d 49 | co-ordinate. .I| 00001610 66 20 74 68 69 73 20 69 73 20 7a 65 72 6f 2c 20 |f this is zero, | 00001620 74 68 65 1a 20 62 65 67 69 6e 6e 69 6e 67 20 6f |the. beginning o| 00001630 66 20 74 68 65 20 6c 69 6e 65 2c 20 74 68 65 20 |f the line, the | 00001640 27 73 70 27 20 72 6f 75 74 69 6e 65 20 6c 69 6e |'sp' routine lin| 00001650 65 20 31 31 32 30 20 69 73 0d 63 61 6c 6c 65 64 |e 1120 is.called| 00001660 2e 20 20 54 68 69 73 20 69 73 1a 20 61 1a 20 73 |. This is. a. s| 00001670 69 6d 70 6c 65 20 6c 6f 6f 70 20 77 68 69 63 68 |imple loop which| 00001680 20 63 68 65 63 6b 73 20 66 6f 72 20 66 75 72 74 | checks for furt| 00001690 68 65 72 20 73 70 61 63 65 73 20 61 6e 64 20 6c |her spaces and l| 000016a0 6f 6f 70 73 0d 62 61 63 6b 1a 20 75 6e 74 69 6c |oops.back. until| 000016b0 20 61 6e 6f 74 68 65 72 20 63 68 61 72 61 63 74 | another charact| 000016c0 65 72 20 69 73 1a 20 66 6f 75 6e 64 1a 20 62 65 |er is. found. be| 000016d0 66 6f 72 65 1a 20 72 65 74 75 72 6e 69 6e 67 1a |fore. returning.| 000016e0 20 74 6f 1a 20 74 68 65 1a 20 70 72 69 6e 74 0d | to. the. print.| 000016f0 72 6f 75 74 69 6e 65 2e 20 20 54 68 69 73 1a 20 |routine. This. | 00001700 6c 65 66 74 1a 20 6a 75 73 74 69 66 69 65 73 1a |left. justifies.| 00001710 20 61 6c 6c 1a 20 74 69 74 6c 65 73 2c 20 65 74 | all. titles, et| 00001720 63 20 77 68 69 63 68 20 77 6f 75 6c 64 20 6f 74 |c which would ot| 00001730 68 65 72 77 69 73 65 20 62 65 0d 73 70 6c 69 74 |herwise be.split| 00001740 2e 0d 20 0d 49 66 20 74 68 65 20 61 64 64 72 65 |.. .If the addre| 00001750 73 73 20 26 33 31 38 20 68 6f 6c 64 73 20 61 20 |ss &318 holds a | 00001760 76 61 6c 75 65 20 67 72 65 61 74 65 72 20 74 68 |value greater th| 00001770 61 6e 20 7a 65 72 6f 2c 20 69 65 1a 20 6e 6f 74 |an zero, ie. not| 00001780 20 74 68 65 20 62 65 67 69 6e 6e 69 6e 67 0d 6f | the beginning.o| 00001790 66 20 74 68 65 20 6c 69 6e 65 2c 20 74 68 65 20 |f the line, the | 000017a0 76 61 6c 75 65 20 69 73 20 63 6f 6d 70 61 72 65 |value is compare| 000017b0 64 20 77 69 74 68 20 74 68 65 20 76 61 6c 75 65 |d with the value| 000017c0 20 6c 6f 61 64 65 64 20 69 6e 74 6f 1a 20 41 1a | loaded into. A.| 000017d0 20 72 65 67 69 73 74 65 72 0d 69 6e 20 6c 69 6e | register.in lin| 000017e0 65 20 31 30 36 30 2e 20 20 49 66 20 74 68 65 1a |e 1060. If the.| 000017f0 20 63 61 72 72 79 1a 20 66 6c 61 67 20 69 73 20 | carry. flag is | 00001800 63 6c 65 61 72 2c 20 69 65 20 74 68 65 20 58 20 |clear, ie the X | 00001810 63 6f 2d 6f 72 64 20 6c 65 73 73 20 74 68 61 6e |co-ord less than| 00001820 20 33 30 2c 0d 70 72 69 6e 74 69 6e 67 20 63 6f | 30,.printing co| 00001830 6e 74 69 6e 75 65 73 20 6e 6f 72 6d 61 6c 6c 79 |ntinues normally| 00001840 2e 20 20 57 68 65 6e 20 74 68 65 20 63 61 72 72 |. When the carr| 00001850 79 20 66 6c 61 67 1a 20 69 73 1a 20 73 65 74 2c |y flag. is. set,| 00001860 1a 20 70 72 69 6e 74 69 6e 67 20 77 69 6c 6c 0d |. printing will.| 00001870 63 6f 6e 74 69 6e 75 65 20 75 6e 74 69 6c 20 61 |continue until a| 00001880 20 73 70 61 63 65 20 69 73 20 66 6f 75 6e 64 20 | space is found | 00001890 77 68 65 6e 20 61 20 43 52 20 63 68 61 72 61 63 |when a CR charac| 000018a0 74 65 72 1a 20 69 73 20 70 72 69 6e 74 65 64 20 |ter. is printed | 000018b0 74 6f 20 73 74 61 72 74 20 61 0d 6e 65 77 20 6c |to start a.new l| 000018c0 69 6e 65 2e 0d 0d |ine...| 000018c6
P/+COD5_1.m0
P/+COD5_1.m1
P/+COD5_1.m2
P/+COD5_1.m4
P/+COD5_1.m5
.