Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_28.ADF » P/+DIMON2
P/+DIMON2
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_28.ADF |
Filename: | P/+DIMON2 |
Read OK: | ✔ |
File size: | 0CBE bytes |
Load address: | 2B206576 |
Exec address: | 41584544 |
File contents
�.........*.......*.......*.......*.......*.......*.......*.......*.......*.< DISC EXAMINE ~~~~~~~~~~~~ By Richard Dimond This is another useful progragm from EU which I have converted to M/code. I have also made some changes to enable you to move back a sector as well as forward. Also to re-run to enter a new address without having to break out of the program. The opening screen is set as in my earlier programs and then the routine 'input' called for entering an address. As I had no idea how to do this, and could not make up one, I have used the routine from TRACKER which I have also submitted. After entering an address, the program goes to the mainloop lines 240 - 680. This contains two nested loops, 'loop2' lines 290 - 600 and 'loop' lines 450 - 560. The mainloop first sets up OSWORD with A=&72 to read 1 sector at disc address 'dadd' to address &3000. The variable 'byte' is set to zero. This is the byte number to be printed at the left of the screen. Loop2 then calls the routine 'title' to clear the screen and print the title. The disc address, track number and sector are then printed. The routine 'daprt' uses the routine 'hexprt2' which is a modifcation of 'hexprt' I made to avoid printing the leading zeroes. I made up the routine 'decprt' as a simpler routine for printing decimal numbers as this program only used a single byte number to print up to 255. If the number is less than 10, the program jumps to 'one' to print a single digit. If it is greater than 199, 200 is deducted and a 2 printed, the remainder is then stored in 'temp'. Similarly for numbers between 100 & 199, 100 is deducted, the remainder stored and 1 printed. The remainder is then reloaded into A and then divided by 10 by subtracting 10 and counting the number using X register in loop 'lp'. This number is printed after being transferred to A register followed the remainder in 'temp'. The string 'head2' is then printed and count loaded with 16 to repeat 'loop' 16 times to print the lines of each half of the sector. Lienes 460,470 print the byte numbers, the comparisons set X to number of spaces needed to line up the numbers and the colon is printed after the number. Line 480 loops round 8 times to print a space and the hex value of the bytes. Then line 490 prints two spaces. The loop 'llp2' prints characters if printable or a '.' if not. The cue to press a key is printed (line 570) and the program waits. The first time a key is pressed, since 'count2' is initially 2, 'loop' will be repeated to print the second half of the sector. When the sector has been printed, the options are printed (lines 610,620). The AND&DF in line 640 allows the use of the lower case letters. When the program waits, carry is set if ESCAPE is pressed and this returns to BASIC. Line 650 increases 'dadd' and, if this goes to zero, 'dadd+1' is increased. The value of 'dadd' is decreased at line 660 and 'dadd+1' is decreased when 'dadd' is decreased to 255. If R is pressed the program jumps to 'st' and 'start' to enter a new address. Otherwise the mainloop is repeated. **************************************************************************
00000000 81 2e 2e 2e 2e 2e 2e 2e 2e 2e 2a 2e 2e 2e 2e 2e |..........*.....| 00000010 2e 2e 2a 2e 2e 2e 2e 2e 2e 2e 2a 2e 2e 2e 2e 2e |..*.......*.....| * 00000040 2e 2e 2a 2e 2e 2e 2e 2e 2e 2e 2a 2e 3c 0d 0d 44 |..*.......*.<..D| 00000050 49 53 43 20 45 58 41 4d 49 4e 45 0d 7e 7e 7e 7e |ISC EXAMINE.~~~~| 00000060 7e 7e 7e 7e 7e 7e 7e 7e 0d 42 79 20 52 69 63 68 |~~~~~~~~.By Rich| 00000070 61 72 64 20 44 69 6d 6f 6e 64 0d 0d 54 68 69 73 |ard Dimond..This| 00000080 1a 20 69 73 20 61 6e 6f 74 68 65 72 20 75 73 65 |. is another use| 00000090 66 75 6c 20 70 72 6f 67 72 61 67 6d 20 66 72 6f |ful progragm fro| 000000a0 6d 20 45 55 20 77 68 69 63 68 20 49 20 68 61 76 |m EU which I hav| 000000b0 65 20 63 6f 6e 76 65 72 74 65 64 20 74 6f 20 4d |e converted to M| 000000c0 2f 63 6f 64 65 2e 20 0d 49 20 68 61 76 65 1a 20 |/code. .I have. | 000000d0 61 6c 73 6f 20 6d 61 64 65 20 73 6f 6d 65 20 63 |also made some c| 000000e0 68 61 6e 67 65 73 20 74 6f 20 65 6e 61 62 6c 65 |hanges to enable| 000000f0 20 79 6f 75 20 74 6f 20 6d 6f 76 65 20 62 61 63 | you to move bac| 00000100 6b 20 61 20 73 65 63 74 6f 72 20 61 73 20 77 65 |k a sector as we| 00000110 6c 6c 0d 61 73 20 66 6f 72 77 61 72 64 2e 20 20 |ll.as forward. | 00000120 41 6c 73 6f 20 74 6f 20 72 65 2d 72 75 6e 20 74 |Also to re-run t| 00000130 6f 20 65 6e 74 65 72 20 61 20 6e 65 77 20 61 64 |o enter a new ad| 00000140 64 72 65 73 73 20 77 69 74 68 6f 75 74 20 68 61 |dress without ha| 00000150 76 69 6e 67 20 74 6f 20 62 72 65 61 6b 0d 6f 75 |ving to break.ou| 00000160 74 20 6f 66 20 74 68 65 20 70 72 6f 67 72 61 6d |t of the program| 00000170 2e 0d 0d 54 68 65 20 6f 70 65 6e 69 6e 67 20 73 |...The opening s| 00000180 63 72 65 65 6e 20 69 73 20 73 65 74 1a 20 61 73 |creen is set. as| 00000190 1a 20 69 6e 20 6d 79 20 65 61 72 6c 69 65 72 20 |. in my earlier | 000001a0 70 72 6f 67 72 61 6d 73 20 61 6e 64 20 74 68 65 |programs and the| 000001b0 6e 20 74 68 65 20 72 6f 75 74 69 6e 65 0d 27 69 |n the routine.'i| 000001c0 6e 70 75 74 27 20 63 61 6c 6c 65 64 20 66 6f 72 |nput' called for| 000001d0 20 65 6e 74 65 72 69 6e 67 20 61 6e 20 61 64 64 | entering an add| 000001e0 72 65 73 73 2e 20 20 41 73 1a 20 49 20 68 61 64 |ress. As. I had| 000001f0 20 6e 6f 20 69 64 65 61 20 68 6f 77 20 74 6f 20 | no idea how to | 00000200 64 6f 20 74 68 69 73 2c 0d 61 6e 64 20 63 6f 75 |do this,.and cou| 00000210 6c 64 20 6e 6f 74 20 6d 61 6b 65 20 75 70 20 6f |ld not make up o| 00000220 6e 65 2c 20 49 20 68 61 76 65 1a 20 75 73 65 64 |ne, I have. used| 00000230 1a 20 74 68 65 1a 20 72 6f 75 74 69 6e 65 20 66 |. the. routine f| 00000240 72 6f 6d 20 54 52 41 43 4b 45 52 20 77 68 69 63 |rom TRACKER whic| 00000250 68 20 49 0d 68 61 76 65 20 61 6c 73 6f 20 73 75 |h I.have also su| 00000260 62 6d 69 74 74 65 64 2e 0d 0d 41 66 74 65 72 1a |bmitted...After.| 00000270 20 65 6e 74 65 72 69 6e 67 20 61 6e 20 61 64 64 | entering an add| 00000280 72 65 73 73 2c 20 74 68 65 20 70 72 6f 67 72 61 |ress, the progra| 00000290 6d 20 67 6f 65 73 20 74 6f 20 74 68 65 20 6d 61 |m goes to the ma| 000002a0 69 6e 6c 6f 6f 70 20 6c 69 6e 65 73 1a 20 32 34 |inloop lines. 24| 000002b0 30 1a 20 2d 0d 36 38 30 2e 20 20 54 68 69 73 1a |0. -.680. This.| 000002c0 20 63 6f 6e 74 61 69 6e 73 1a 20 74 77 6f 20 6e | contains. two n| 000002d0 65 73 74 65 64 20 6c 6f 6f 70 73 2c 20 27 6c 6f |ested loops, 'lo| 000002e0 6f 70 32 27 20 6c 69 6e 65 73 20 32 39 30 20 2d |op2' lines 290 -| 000002f0 20 36 30 30 20 61 6e 64 20 27 6c 6f 6f 70 27 0d | 600 and 'loop'.| 00000300 6c 69 6e 65 73 20 34 35 30 20 2d 20 35 36 30 2e |lines 450 - 560.| 00000310 0d 0d 54 68 65 20 6d 61 69 6e 6c 6f 6f 70 20 66 |..The mainloop f| 00000320 69 72 73 74 20 73 65 74 73 1a 20 75 70 1a 20 4f |irst sets. up. O| 00000330 53 57 4f 52 44 1a 20 77 69 74 68 1a 20 41 3d 26 |SWORD. with. A=&| 00000340 37 32 1a 20 74 6f 20 72 65 61 64 20 31 20 73 65 |72. to read 1 se| 00000350 63 74 6f 72 20 61 74 20 64 69 73 63 0d 61 64 64 |ctor at disc.add| 00000360 72 65 73 73 1a 20 27 64 61 64 64 27 1a 20 74 6f |ress. 'dadd'. to| 00000370 20 61 64 64 72 65 73 73 20 26 33 30 30 30 2e 20 | address &3000. | 00000380 20 54 68 65 20 76 61 72 69 61 62 6c 65 20 27 62 | The variable 'b| 00000390 79 74 65 27 20 69 73 1a 20 73 65 74 1a 20 74 6f |yte' is. set. to| 000003a0 1a 20 7a 65 72 6f 2e 20 0d 54 68 69 73 20 69 73 |. zero. .This is| 000003b0 20 74 68 65 20 62 79 74 65 20 6e 75 6d 62 65 72 | the byte number| 000003c0 20 74 6f 20 62 65 20 70 72 69 6e 74 65 64 20 61 | to be printed a| 000003d0 74 20 74 68 65 20 6c 65 66 74 20 6f 66 20 74 68 |t the left of th| 000003e0 65 20 73 63 72 65 65 6e 2e 0d 0d 4c 6f 6f 70 32 |e screen...Loop2| 000003f0 20 74 68 65 6e 20 63 61 6c 6c 73 1a 20 74 68 65 | then calls. the| 00000400 1a 20 72 6f 75 74 69 6e 65 1a 20 27 74 69 74 6c |. routine. 'titl| 00000410 65 27 1a 20 74 6f 20 63 6c 65 61 72 20 74 68 65 |e'. to clear the| 00000420 20 73 63 72 65 65 6e 20 61 6e 64 20 70 72 69 6e | screen and prin| 00000430 74 20 74 68 65 0d 74 69 74 6c 65 2e 20 20 54 68 |t the.title. Th| 00000440 65 20 64 69 73 63 20 61 64 64 72 65 73 73 2c 20 |e disc address, | 00000450 74 72 61 63 6b 20 6e 75 6d 62 65 72 20 61 6e 64 |track number and| 00000460 20 73 65 63 74 6f 72 20 61 72 65 20 74 68 65 6e | sector are then| 00000470 20 70 72 69 6e 74 65 64 2e 0d 0d 54 68 65 20 72 | printed...The r| 00000480 6f 75 74 69 6e 65 20 27 64 61 70 72 74 27 20 75 |outine 'daprt' u| 00000490 73 65 73 20 74 68 65 20 72 6f 75 74 69 6e 65 20 |ses the routine | 000004a0 27 68 65 78 70 72 74 32 27 1a 20 77 68 69 63 68 |'hexprt2'. which| 000004b0 1a 20 69 73 20 61 20 6d 6f 64 69 66 63 61 74 69 |. is a modifcati| 000004c0 6f 6e 20 6f 66 0d 27 68 65 78 70 72 74 27 20 49 |on of.'hexprt' I| 000004d0 20 6d 61 64 65 20 74 6f 20 61 76 6f 69 64 20 70 | made to avoid p| 000004e0 72 69 6e 74 69 6e 67 20 74 68 65 20 6c 65 61 64 |rinting the lead| 000004f0 69 6e 67 20 7a 65 72 6f 65 73 2e 0d 0d 49 20 6d |ing zeroes...I m| 00000500 61 64 65 20 75 70 20 74 68 65 20 72 6f 75 74 69 |ade up the routi| 00000510 6e 65 1a 20 27 64 65 63 70 72 74 27 1a 20 61 73 |ne. 'decprt'. as| 00000520 20 61 20 73 69 6d 70 6c 65 72 20 72 6f 75 74 69 | a simpler routi| 00000530 6e 65 20 66 6f 72 20 70 72 69 6e 74 69 6e 67 20 |ne for printing | 00000540 64 65 63 69 6d 61 6c 0d 6e 75 6d 62 65 72 73 20 |decimal.numbers | 00000550 61 73 20 74 68 69 73 20 70 72 6f 67 72 61 6d 20 |as this program | 00000560 6f 6e 6c 79 20 75 73 65 64 20 61 20 73 69 6e 67 |only used a sing| 00000570 6c 65 20 62 79 74 65 20 6e 75 6d 62 65 72 20 74 |le byte number t| 00000580 6f 20 70 72 69 6e 74 20 75 70 20 74 6f 20 32 35 |o print up to 25| 00000590 35 2e 20 0d 49 66 20 74 68 65 20 6e 75 6d 62 65 |5. .If the numbe| 000005a0 72 20 69 73 20 6c 65 73 73 20 74 68 61 6e 20 31 |r is less than 1| 000005b0 30 2c 1a 20 74 68 65 1a 20 70 72 6f 67 72 61 6d |0,. the. program| 000005c0 1a 20 6a 75 6d 70 73 1a 20 74 6f 1a 20 27 6f 6e |. jumps. to. 'on| 000005d0 65 27 1a 20 74 6f 20 70 72 69 6e 74 20 61 0d 73 |e'. to print a.s| 000005e0 69 6e 67 6c 65 20 64 69 67 69 74 2e 20 20 49 66 |ingle digit. If| 000005f0 20 69 74 20 69 73 20 67 72 65 61 74 65 72 20 74 | it is greater t| 00000600 68 61 6e 20 31 39 39 2c 20 32 30 30 20 69 73 20 |han 199, 200 is | 00000610 64 65 64 75 63 74 65 64 20 61 6e 64 20 61 20 32 |deducted and a 2| 00000620 20 70 72 69 6e 74 65 64 2c 0d 74 68 65 20 72 65 | printed,.the re| 00000630 6d 61 69 6e 64 65 72 20 69 73 20 74 68 65 6e 20 |mainder is then | 00000640 73 74 6f 72 65 64 20 69 6e 20 27 74 65 6d 70 27 |stored in 'temp'| 00000650 2e 20 20 53 69 6d 69 6c 61 72 6c 79 20 66 6f 72 |. Similarly for| 00000660 20 6e 75 6d 62 65 72 73 20 62 65 74 77 65 65 6e | numbers between| 00000670 20 31 30 30 0d 26 20 31 39 39 2c 20 31 30 30 20 | 100.& 199, 100 | 00000680 69 73 20 64 65 64 75 63 74 65 64 2c 20 74 68 65 |is deducted, the| 00000690 20 72 65 6d 61 69 6e 64 65 72 20 73 74 6f 72 65 | remainder store| 000006a0 64 20 61 6e 64 20 31 20 70 72 69 6e 74 65 64 2e |d and 1 printed.| 000006b0 20 20 54 68 65 20 72 65 6d 61 69 6e 64 65 72 0d | The remainder.| 000006c0 69 73 20 74 68 65 6e 20 72 65 6c 6f 61 64 65 64 |is then reloaded| 000006d0 20 69 6e 74 6f 20 41 1a 20 61 6e 64 1a 20 74 68 | into A. and. th| 000006e0 65 6e 1a 20 64 69 76 69 64 65 64 1a 20 62 79 1a |en. divided. by.| 000006f0 20 31 30 1a 20 62 79 20 73 75 62 74 72 61 63 74 | 10. by subtract| 00000700 69 6e 67 20 31 30 20 61 6e 64 0d 63 6f 75 6e 74 |ing 10 and.count| 00000710 69 6e 67 20 74 68 65 20 6e 75 6d 62 65 72 20 75 |ing the number u| 00000720 73 69 6e 67 20 58 20 72 65 67 69 73 74 65 72 20 |sing X register | 00000730 69 6e 20 6c 6f 6f 70 20 27 6c 70 27 2e 20 20 54 |in loop 'lp'. T| 00000740 68 69 73 20 6e 75 6d 62 65 72 20 69 73 20 70 72 |his number is pr| 00000750 69 6e 74 65 64 0d 61 66 74 65 72 20 62 65 69 6e |inted.after bein| 00000760 67 20 74 72 61 6e 73 66 65 72 72 65 64 20 74 6f |g transferred to| 00000770 20 41 20 72 65 67 69 73 74 65 72 20 66 6f 6c 6c | A register foll| 00000780 6f 77 65 64 20 74 68 65 20 72 65 6d 61 69 6e 64 |owed the remaind| 00000790 65 72 20 69 6e 20 27 74 65 6d 70 27 2e 0d 0d 54 |er in 'temp'...T| 000007a0 68 65 1a 20 73 74 72 69 6e 67 1a 20 27 68 65 61 |he. string. 'hea| 000007b0 64 32 27 20 69 73 20 74 68 65 6e 20 70 72 69 6e |d2' is then prin| 000007c0 74 65 64 20 61 6e 64 20 63 6f 75 6e 74 20 6c 6f |ted and count lo| 000007d0 61 64 65 64 20 77 69 74 68 1a 20 31 36 1a 20 74 |aded with. 16. t| 000007e0 6f 1a 20 72 65 70 65 61 74 0d 27 6c 6f 6f 70 27 |o. repeat.'loop'| 000007f0 20 31 36 20 74 69 6d 65 73 20 74 6f 20 70 72 69 | 16 times to pri| 00000800 6e 74 20 74 68 65 20 6c 69 6e 65 73 20 6f 66 20 |nt the lines of | 00000810 65 61 63 68 20 68 61 6c 66 20 6f 66 20 74 68 65 |each half of the| 00000820 20 73 65 63 74 6f 72 2e 0d 0d 4c 69 65 6e 65 73 | sector...Lienes| 00000830 20 34 36 30 2c 34 37 30 20 70 72 69 6e 74 1a 20 | 460,470 print. | 00000840 74 68 65 20 62 79 74 65 20 6e 75 6d 62 65 72 73 |the byte numbers| 00000850 2c 20 74 68 65 20 63 6f 6d 70 61 72 69 73 6f 6e |, the comparison| 00000860 73 20 73 65 74 20 58 20 74 6f 20 6e 75 6d 62 65 |s set X to numbe| 00000870 72 20 6f 66 0d 73 70 61 63 65 73 20 6e 65 65 64 |r of.spaces need| 00000880 65 64 20 74 6f 20 6c 69 6e 65 1a 20 75 70 1a 20 |ed to line. up. | 00000890 74 68 65 1a 20 6e 75 6d 62 65 72 73 20 61 6e 64 |the. numbers and| 000008a0 20 74 68 65 20 63 6f 6c 6f 6e 20 69 73 20 70 72 | the colon is pr| 000008b0 69 6e 74 65 64 20 61 66 74 65 72 20 74 68 65 0d |inted after the.| 000008c0 6e 75 6d 62 65 72 2e 20 20 4c 69 6e 65 20 34 38 |number. Line 48| 000008d0 30 20 6c 6f 6f 70 73 20 72 6f 75 6e 64 20 38 20 |0 loops round 8 | 000008e0 74 69 6d 65 73 1a 20 74 6f 1a 20 70 72 69 6e 74 |times. to. print| 000008f0 20 61 20 73 70 61 63 65 20 61 6e 64 20 74 68 65 | a space and the| 00000900 20 68 65 78 20 76 61 6c 75 65 0d 6f 66 20 74 68 | hex value.of th| 00000910 65 20 62 79 74 65 73 2e 20 20 54 68 65 6e 20 6c |e bytes. Then l| 00000920 69 6e 65 1a 20 34 39 30 1a 20 70 72 69 6e 74 73 |ine. 490. prints| 00000930 1a 20 74 77 6f 1a 20 73 70 61 63 65 73 2e 20 20 |. two. spaces. | 00000940 54 68 65 20 6c 6f 6f 70 20 27 6c 6c 70 32 27 20 |The loop 'llp2' | 00000950 70 72 69 6e 74 73 0d 63 68 61 72 61 63 74 65 72 |prints.character| 00000960 73 20 69 66 20 70 72 69 6e 74 61 62 6c 65 20 6f |s if printable o| 00000970 72 20 61 20 27 2e 27 20 69 66 20 6e 6f 74 2e 0d |r a '.' if not..| 00000980 0d 54 68 65 20 63 75 65 20 74 6f 20 70 72 65 73 |.The cue to pres| 00000990 73 20 61 20 6b 65 79 20 69 73 20 70 72 69 6e 74 |s a key is print| 000009a0 65 64 20 28 6c 69 6e 65 20 35 37 30 29 20 61 6e |ed (line 570) an| 000009b0 64 20 74 68 65 20 70 72 6f 67 72 61 6d 20 77 61 |d the program wa| 000009c0 69 74 73 2e 20 20 0d 0d 54 68 65 20 66 69 72 73 |its. ..The firs| 000009d0 74 20 74 69 6d 65 20 61 20 6b 65 79 1a 20 69 73 |t time a key. is| 000009e0 1a 20 70 72 65 73 73 65 64 2c 1a 20 73 69 6e 63 |. pressed,. sinc| 000009f0 65 1a 20 27 63 6f 75 6e 74 32 27 20 69 73 20 69 |e. 'count2' is i| 00000a00 6e 69 74 69 61 6c 6c 79 20 32 2c 20 27 6c 6f 6f |nitially 2, 'loo| 00000a10 70 27 0d 77 69 6c 6c 20 62 65 20 72 65 70 65 61 |p'.will be repea| 00000a20 74 65 64 20 74 6f 20 70 72 69 6e 74 20 74 68 65 |ted to print the| 00000a30 20 73 65 63 6f 6e 64 20 68 61 6c 66 20 6f 66 20 | second half of | 00000a40 74 68 65 20 73 65 63 74 6f 72 2e 0d 0d 57 68 65 |the sector...Whe| 00000a50 6e 20 74 68 65 20 73 65 63 74 6f 72 20 68 61 73 |n the sector has| 00000a60 20 62 65 65 6e 20 70 72 69 6e 74 65 64 2c 20 74 | been printed, t| 00000a70 68 65 20 6f 70 74 69 6f 6e 73 20 61 72 65 20 70 |he options are p| 00000a80 72 69 6e 74 65 64 20 28 6c 69 6e 65 73 20 36 31 |rinted (lines 61| 00000a90 30 2c 36 32 30 29 2e 0d 54 68 65 20 41 4e 44 26 |0,620)..The AND&| 00000aa0 44 46 20 69 6e 20 6c 69 6e 65 20 36 34 30 20 61 |DF in line 640 a| 00000ab0 6c 6c 6f 77 73 20 74 68 65 20 75 73 65 20 6f 66 |llows the use of| 00000ac0 20 74 68 65 20 6c 6f 77 65 72 20 63 61 73 65 20 | the lower case | 00000ad0 6c 65 74 74 65 72 73 2e 20 20 57 68 65 6e 20 74 |letters. When t| 00000ae0 68 65 0d 70 72 6f 67 72 61 6d 20 77 61 69 74 73 |he.program waits| 00000af0 2c 20 63 61 72 72 79 20 69 73 20 73 65 74 1a 20 |, carry is set. | 00000b00 69 66 1a 20 45 53 43 41 50 45 1a 20 69 73 1a 20 |if. ESCAPE. is. | 00000b10 70 72 65 73 73 65 64 1a 20 61 6e 64 1a 20 74 68 |pressed. and. th| 00000b20 69 73 20 72 65 74 75 72 6e 73 20 74 6f 0d 42 41 |is returns to.BA| 00000b30 53 49 43 2e 0d 0d 4c 69 6e 65 1a 20 36 35 30 1a |SIC...Line. 650.| 00000b40 20 69 6e 63 72 65 61 73 65 73 1a 20 27 64 61 64 | increases. 'dad| 00000b50 64 27 1a 20 61 6e 64 2c 1a 20 69 66 1a 20 74 68 |d'. and,. if. th| 00000b60 69 73 1a 20 67 6f 65 73 1a 20 74 6f 1a 20 7a 65 |is. goes. to. ze| 00000b70 72 6f 2c 20 27 64 61 64 64 2b 31 27 1a 20 69 73 |ro, 'dadd+1'. is| 00000b80 0d 69 6e 63 72 65 61 73 65 64 2e 20 20 54 68 65 |.increased. The| 00000b90 20 76 61 6c 75 65 20 6f 66 20 27 64 61 64 64 27 | value of 'dadd'| 00000ba0 20 69 73 20 64 65 63 72 65 61 73 65 64 20 61 74 | is decreased at| 00000bb0 20 6c 69 6e 65 20 36 36 30 20 61 6e 64 1a 20 27 | line 660 and. '| 00000bc0 64 61 64 64 2b 31 27 1a 20 69 73 0d 64 65 63 72 |dadd+1'. is.decr| 00000bd0 65 61 73 65 64 20 77 68 65 6e 20 27 64 61 64 64 |eased when 'dadd| 00000be0 27 20 69 73 20 64 65 63 72 65 61 73 65 64 20 74 |' is decreased t| 00000bf0 6f 20 32 35 35 2e 0d 0d 49 66 1a 20 52 1a 20 69 |o 255...If. R. i| 00000c00 73 1a 20 70 72 65 73 73 65 64 1a 20 74 68 65 1a |s. pressed. the.| 00000c10 20 70 72 6f 67 72 61 6d 1a 20 6a 75 6d 70 73 20 | program. jumps | 00000c20 74 6f 20 27 73 74 27 20 61 6e 64 20 27 73 74 61 |to 'st' and 'sta| 00000c30 72 74 27 20 74 6f 20 65 6e 74 65 72 20 61 20 6e |rt' to enter a n| 00000c40 65 77 0d 61 64 64 72 65 73 73 2e 20 20 4f 74 68 |ew.address. Oth| 00000c50 65 72 77 69 73 65 20 74 68 65 20 6d 61 69 6e 6c |erwise the mainl| 00000c60 6f 6f 70 20 69 73 20 72 65 70 65 61 74 65 64 2e |oop is repeated.| 00000c70 0d 0d 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |..**************| 00000c80 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a |****************| * 00000cb0 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 2a 0d 0d |************..| 00000cbe