Home » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_23.ADF » F/M\Ctut2
F/M\Ctut2
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_23.ADF |
| Filename: | F/M\Ctut2 |
| Read OK: | ✔ |
| File size: | 1261 bytes |
| Load address: | 4D206576 |
| Exec address: | 7574432F |
File contents
lives (890-920) print the man at the top of the screen by tranferring the
data from &1E20 to the screen area at &5A38 and from &1E38 to &5B78. This
is followed by printing the data dat (line 1940) using the dh routine.
lev (930-950) sets the level and prints Thinking.
load (960-1010) first checks the level, doubles it (ASL A) and subtracts
two (DEX:DEX) so the value in X register is 0, 2, 4, 6 or 8. This is used
as an index to select the data address from the data table in line 1950.
The data is then loaded from that address adding 159 each time to convert
to the character numbers. Line 980 calls the subroutine to save the key
address. Line 990 counts the number of diamonds, earth and mushrooms and
stores these in maxdi%, maxea% and maxsq%. Line 1000 loads the level data
over the memory area &534B onwards as explained earlier.
set (1020) sets the variables MX% and MY% for the position of the man.
set2 (1030) sets x% and y% in the same way.
sc1 and sc2 (1040-1070) print the score. sc (1060-1070) is the routine
for printing decimal from the hex value in the variable digits. sc1 adds
3 each time for earth collected and sc2 adds 10 for diamonds.
prt (1100) together with the following routines to line 1150 print the
number of diamonds, earth and mushrooms remaining. h, t and u calulate
the hundreds, tens and units of the value stored at &70. di, ea and sq
set the values and print co-ordinates for each one.
ki (1160-1180) flashes the key by printing charater 232 or 233. The
characters alternating to produce the flashing.
kyaddr (1190) uses routine cal to find the address of the key from its
co-ordinates and saves this in the variable kad.
eas(1200) and dis (1210) count the earth and diamonds collected and call
sc1 or sc1 to add to the score.
chk1 (1220,1230) checks whether you have lost a life or completed a level.
Also when all levels are completed.
ss% (1240) sets data to D% and addr to &6390.
ded (1250,1260) flashes the man. decreases li% and increases deadman, when
you lose a life.
move (1270-1330) reads the keys. With A register loaded with 129, Y with
&FF and X with the negative INKEY value, after the call to osbyte Y=0 if
the key is not pressed and -1 when pressed. If no keys are pressed, all
comparisons are equal and the routine ends. If a key is pressed, the
routine for that key is called as the comparison is not equal.
Keys Q and S call the routines sdoff and sdon as explained.
The ESCAPE key calls the routine ded and replaces the data address with a
space.
The four movement routines (1340-1440) are somewhat complex.
It is first necessary to check the address of the position to which
movement is to be made. For left and right movement this is -1 and +1
relative to the position of the man and for up and down they are -24 and
+24. I used the indexed addressing LDA(mp),Y to do this and to avoid the
negative values, which are not permissible, I set Y to 48 so that the
address in mp +48 points to the address of the man. The address held in
mp is calculated as the address of the man minus 48. With Y=47 will then
point to the position on the left and Y=49 that on the right. Similarly,
Y=24 points to the one above and Y=72 to the one below.
Each routine first calculates the address to be held in mp with the
routine mpos and checks the relevant address as explained above. Then the
following comparisons are made -
CMP#231 (safe) - if equal, cannot move
if greater (carry flag set) ie Key collected - jump chg to call T%
CMP#224 (brick) - if equal, cannot move
CMP#225 (rock) - if up or down and equal - cannot move
- if left or right, check next address
if not 229 (space), cannot move
else move rock
CMP#227 (mushroom) - if equal, JMP ded
CMP#226 (diamond) - if equal, JSRdis, move
CMP#228 (earth) - if equal, JSReas, move
else move
When a move is made the character in memory is replaced with a space
character and the variables re-calculated and the dispay redrawn.
rep (1450) waits for space to be pressed.
gamend (1460-1480) prints the final message (DATA lines 1980-2010), starts
the tune with *FX14,4 and asks if you want another game. Then waits for Y
or N to be pressed.
mload (1490-1570) first print a message asking for the suffix number
(1-5). After pressing the number key, the number is inserted in the
loading message (DATA line 2080) and in the loading command (DATA line
2090) for the file to be loaded.
Lines 1580 - 1610 make space for the variables.
00000000 20 0d 6c 69 76 65 73 20 28 38 39 30 2d 39 32 30 | .lives (890-920| 00000010 29 20 70 72 69 6e 74 1a 20 74 68 65 20 6d 61 6e |) print. the man| 00000020 20 61 74 20 74 68 65 20 74 6f 70 20 6f 66 20 74 | at the top of t| 00000030 68 65 20 73 63 72 65 65 6e 20 62 79 20 74 72 61 |he screen by tra| 00000040 6e 66 65 72 72 69 6e 67 20 74 68 65 0d 64 61 74 |nferring the.dat| 00000050 61 20 66 72 6f 6d 20 26 31 45 32 30 20 74 6f 20 |a from &1E20 to | 00000060 74 68 65 20 73 63 72 65 65 6e 20 61 72 65 61 20 |the screen area | 00000070 61 74 20 26 35 41 33 38 20 61 6e 64 20 66 72 6f |at &5A38 and fro| 00000080 6d 20 26 31 45 33 38 20 74 6f 20 26 35 42 37 38 |m &1E38 to &5B78| 00000090 2e 20 20 54 68 69 73 0d 69 73 20 66 6f 6c 6c 6f |. This.is follo| 000000a0 77 65 64 20 62 79 20 70 72 69 6e 74 69 6e 67 20 |wed by printing | 000000b0 74 68 65 20 64 61 74 61 20 64 61 74 20 28 6c 69 |the data dat (li| 000000c0 6e 65 20 31 39 34 30 29 20 75 73 69 6e 67 20 74 |ne 1940) using t| 000000d0 68 65 20 64 68 20 72 6f 75 74 69 6e 65 2e 0d 0d |he dh routine...| 000000e0 6c 65 76 20 28 39 33 30 2d 39 35 30 29 20 73 65 |lev (930-950) se| 000000f0 74 73 20 74 68 65 20 6c 65 76 65 6c 20 61 6e 64 |ts the level and| 00000100 20 70 72 69 6e 74 73 20 54 68 69 6e 6b 69 6e 67 | prints Thinking| 00000110 2e 0d 20 0d 6c 6f 61 64 1a 20 28 39 36 30 2d 31 |.. .load. (960-1| 00000120 30 31 30 29 1a 20 66 69 72 73 74 20 63 68 65 63 |010). first chec| 00000130 6b 73 20 74 68 65 20 6c 65 76 65 6c 2c 20 64 6f |ks the level, do| 00000140 75 62 6c 65 73 20 69 74 20 28 41 53 4c 20 41 29 |ubles it (ASL A)| 00000150 20 61 6e 64 20 73 75 62 74 72 61 63 74 73 0d 74 | and subtracts.t| 00000160 77 6f 20 28 44 45 58 3a 44 45 58 29 20 73 6f 20 |wo (DEX:DEX) so | 00000170 74 68 65 20 76 61 6c 75 65 1a 20 69 6e 20 58 20 |the value. in X | 00000180 72 65 67 69 73 74 65 72 20 69 73 20 30 2c 20 32 |register is 0, 2| 00000190 2c 20 34 2c 20 36 20 6f 72 20 38 2e 20 54 68 69 |, 4, 6 or 8. Thi| 000001a0 73 20 69 73 20 75 73 65 64 0d 61 73 20 61 6e 20 |s is used.as an | 000001b0 69 6e 64 65 78 20 74 6f 20 73 65 6c 65 63 74 20 |index to select | 000001c0 74 68 65 1a 20 64 61 74 61 1a 20 61 64 64 72 65 |the. data. addre| 000001d0 73 73 20 66 72 6f 6d 20 74 68 65 20 64 61 74 61 |ss from the data| 000001e0 20 74 61 62 6c 65 20 69 6e 20 6c 69 6e 65 20 31 | table in line 1| 000001f0 39 35 30 2e 0d 54 68 65 20 64 61 74 61 20 69 73 |950..The data is| 00000200 20 74 68 65 6e 20 6c 6f 61 64 65 64 20 66 72 6f | then loaded fro| 00000210 6d 20 74 68 61 74 20 61 64 64 72 65 73 73 1a 20 |m that address. | 00000220 61 64 64 69 6e 67 20 31 35 39 20 65 61 63 68 20 |adding 159 each | 00000230 74 69 6d 65 20 74 6f 20 63 6f 6e 76 65 72 74 0d |time to convert.| 00000240 74 6f 20 74 68 65 20 63 68 61 72 61 63 74 65 72 |to the character| 00000250 20 6e 75 6d 62 65 72 73 2e 20 20 4c 69 6e 65 20 | numbers. Line | 00000260 39 38 30 20 63 61 6c 6c 73 20 74 68 65 20 73 75 |980 calls the su| 00000270 62 72 6f 75 74 69 6e 65 1a 20 74 6f 1a 20 73 61 |broutine. to. sa| 00000280 76 65 20 74 68 65 20 6b 65 79 0d 61 64 64 72 65 |ve the key.addre| 00000290 73 73 2e 1a 20 20 4c 69 6e 65 20 39 39 30 20 63 |ss.. Line 990 c| 000002a0 6f 75 6e 74 73 20 74 68 65 20 6e 75 6d 62 65 72 |ounts the number| 000002b0 20 6f 66 20 64 69 61 6d 6f 6e 64 73 2c 20 65 61 | of diamonds, ea| 000002c0 72 74 68 20 61 6e 64 20 6d 75 73 68 72 6f 6f 6d |rth and mushroom| 000002d0 73 20 61 6e 64 0d 73 74 6f 72 65 73 20 74 68 65 |s and.stores the| 000002e0 73 65 20 69 6e 20 6d 61 78 64 69 25 2c 20 6d 61 |se in maxdi%, ma| 000002f0 78 65 61 25 20 61 6e 64 20 6d 61 78 73 71 25 2e |xea% and maxsq%.| 00000300 20 20 4c 69 6e 65 20 31 30 30 30 20 6c 6f 61 64 | Line 1000 load| 00000310 73 20 74 68 65 20 6c 65 76 65 6c 20 64 61 74 61 |s the level data| 00000320 0d 6f 76 65 72 20 74 68 65 20 6d 65 6d 6f 72 79 |.over the memory| 00000330 20 61 72 65 61 20 26 35 33 34 42 20 6f 6e 77 61 | area &534B onwa| 00000340 72 64 73 20 61 73 20 65 78 70 6c 61 69 6e 65 64 |rds as explained| 00000350 20 65 61 72 6c 69 65 72 2e 0d 0d 73 65 74 20 28 | earlier...set (| 00000360 31 30 32 30 29 20 73 65 74 73 20 74 68 65 20 76 |1020) sets the v| 00000370 61 72 69 61 62 6c 65 73 20 4d 58 25 20 61 6e 64 |ariables MX% and| 00000380 20 4d 59 25 20 66 6f 72 20 74 68 65 20 70 6f 73 | MY% for the pos| 00000390 69 74 69 6f 6e 20 6f 66 20 74 68 65 20 6d 61 6e |ition of the man| 000003a0 2e 0d 0d 73 65 74 32 20 28 31 30 33 30 29 20 73 |...set2 (1030) s| 000003b0 65 74 73 20 78 25 20 61 6e 64 20 79 25 20 69 6e |ets x% and y% in| 000003c0 20 74 68 65 20 73 61 6d 65 20 77 61 79 2e 0d 0d | the same way...| 000003d0 73 63 31 1a 20 61 6e 64 1a 20 73 63 32 1a 20 28 |sc1. and. sc2. (| 000003e0 31 30 34 30 2d 31 30 37 30 29 20 70 72 69 6e 74 |1040-1070) print| 000003f0 20 74 68 65 20 73 63 6f 72 65 2e 20 20 73 63 20 | the score. sc | 00000400 28 31 30 36 30 2d 31 30 37 30 29 20 69 73 20 74 |(1060-1070) is t| 00000410 68 65 20 72 6f 75 74 69 6e 65 0d 66 6f 72 20 70 |he routine.for p| 00000420 72 69 6e 74 69 6e 67 20 64 65 63 69 6d 61 6c 20 |rinting decimal | 00000430 66 72 6f 6d 1a 20 74 68 65 20 68 65 78 20 76 61 |from. the hex va| 00000440 6c 75 65 20 69 6e 20 74 68 65 20 76 61 72 69 61 |lue in the varia| 00000450 62 6c 65 20 64 69 67 69 74 73 2e 20 20 73 63 31 |ble digits. sc1| 00000460 20 61 64 64 73 0d 33 20 65 61 63 68 20 74 69 6d | adds.3 each tim| 00000470 65 20 66 6f 72 20 65 61 72 74 68 20 63 6f 6c 6c |e for earth coll| 00000480 65 63 74 65 64 20 61 6e 64 20 73 63 32 20 61 64 |ected and sc2 ad| 00000490 64 73 20 31 30 20 66 6f 72 20 64 69 61 6d 6f 6e |ds 10 for diamon| 000004a0 64 73 2e 0d 0d 70 72 74 20 28 31 31 30 30 29 20 |ds...prt (1100) | 000004b0 74 6f 67 65 74 68 65 72 20 77 69 74 68 20 74 68 |together with th| 000004c0 65 1a 20 66 6f 6c 6c 6f 77 69 6e 67 1a 20 72 6f |e. following. ro| 000004d0 75 74 69 6e 65 73 1a 20 74 6f 1a 20 6c 69 6e 65 |utines. to. line| 000004e0 20 31 31 35 30 20 70 72 69 6e 74 20 74 68 65 0d | 1150 print the.| 000004f0 6e 75 6d 62 65 72 20 6f 66 20 64 69 61 6d 6f 6e |number of diamon| 00000500 64 73 2c 20 65 61 72 74 68 20 61 6e 64 20 6d 75 |ds, earth and mu| 00000510 73 68 72 6f 6f 6d 73 20 72 65 6d 61 69 6e 69 6e |shrooms remainin| 00000520 67 2e 20 20 68 2c 20 74 1a 20 61 6e 64 1a 20 75 |g. h, t. and. u| 00000530 1a 20 63 61 6c 75 6c 61 74 65 0d 74 68 65 1a 20 |. calulate.the. | 00000540 68 75 6e 64 72 65 64 73 2c 1a 20 74 65 6e 73 1a |hundreds,. tens.| 00000550 20 61 6e 64 20 75 6e 69 74 73 20 6f 66 20 74 68 | and units of th| 00000560 65 20 76 61 6c 75 65 20 73 74 6f 72 65 64 20 61 |e value stored a| 00000570 74 20 26 37 30 2e 20 20 64 69 2c 20 65 61 20 61 |t &70. di, ea a| 00000580 6e 64 20 73 71 0d 73 65 74 20 74 68 65 20 76 61 |nd sq.set the va| 00000590 6c 75 65 73 20 61 6e 64 20 70 72 69 6e 74 20 63 |lues and print c| 000005a0 6f 2d 6f 72 64 69 6e 61 74 65 73 20 66 6f 72 20 |o-ordinates for | 000005b0 65 61 63 68 20 6f 6e 65 2e 0d 0d 6b 69 20 28 31 |each one...ki (1| 000005c0 31 36 30 2d 31 31 38 30 29 20 66 6c 61 73 68 65 |160-1180) flashe| 000005d0 73 1a 20 74 68 65 1a 20 6b 65 79 1a 20 62 79 1a |s. the. key. by.| 000005e0 20 70 72 69 6e 74 69 6e 67 1a 20 63 68 61 72 61 | printing. chara| 000005f0 74 65 72 1a 20 32 33 32 20 6f 72 20 32 33 33 2e |ter. 232 or 233.| 00000600 20 20 54 68 65 0d 63 68 61 72 61 63 74 65 72 73 | The.characters| 00000610 20 61 6c 74 65 72 6e 61 74 69 6e 67 20 74 6f 20 | alternating to | 00000620 70 72 6f 64 75 63 65 20 74 68 65 20 66 6c 61 73 |produce the flas| 00000630 68 69 6e 67 2e 0d 0d 6b 79 61 64 64 72 20 28 31 |hing...kyaddr (1| 00000640 31 39 30 29 20 75 73 65 73 20 72 6f 75 74 69 6e |190) uses routin| 00000650 65 20 63 61 6c 20 74 6f 20 66 69 6e 64 20 74 68 |e cal to find th| 00000660 65 20 61 64 64 72 65 73 73 20 6f 66 1a 20 74 68 |e address of. th| 00000670 65 1a 20 6b 65 79 1a 20 66 72 6f 6d 1a 20 69 74 |e. key. from. it| 00000680 73 0d 63 6f 2d 6f 72 64 69 6e 61 74 65 73 20 61 |s.co-ordinates a| 00000690 6e 64 20 73 61 76 65 73 20 74 68 69 73 20 69 6e |nd saves this in| 000006a0 20 74 68 65 20 76 61 72 69 61 62 6c 65 20 6b 61 | the variable ka| 000006b0 64 2e 0d 0d 65 61 73 1a 28 31 32 30 30 29 20 61 |d...eas.(1200) a| 000006c0 6e 64 20 64 69 73 20 28 31 32 31 30 29 20 63 6f |nd dis (1210) co| 000006d0 75 6e 74 20 74 68 65 20 65 61 72 74 68 1a 20 61 |unt the earth. a| 000006e0 6e 64 20 64 69 61 6d 6f 6e 64 73 20 63 6f 6c 6c |nd diamonds coll| 000006f0 65 63 74 65 64 20 61 6e 64 20 63 61 6c 6c 0d 73 |ected and call.s| 00000700 63 31 20 6f 72 20 73 63 31 20 74 6f 20 61 64 64 |c1 or sc1 to add| 00000710 20 74 6f 20 74 68 65 20 73 63 6f 72 65 2e 0d 0d | to the score...| 00000720 63 68 6b 31 20 28 31 32 32 30 2c 31 32 33 30 29 |chk1 (1220,1230)| 00000730 20 63 68 65 63 6b 73 20 77 68 65 74 68 65 72 20 | checks whether | 00000740 79 6f 75 20 68 61 76 65 20 6c 6f 73 74 20 61 20 |you have lost a | 00000750 6c 69 66 65 20 6f 72 20 63 6f 6d 70 6c 65 74 65 |life or complete| 00000760 64 20 61 20 6c 65 76 65 6c 2e 0d 41 6c 73 6f 20 |d a level..Also | 00000770 77 68 65 6e 20 61 6c 6c 20 6c 65 76 65 6c 73 20 |when all levels | 00000780 61 72 65 20 63 6f 6d 70 6c 65 74 65 64 2e 0d 0d |are completed...| 00000790 73 73 25 20 28 31 32 34 30 29 20 73 65 74 73 20 |ss% (1240) sets | 000007a0 64 61 74 61 20 74 6f 20 44 25 20 61 6e 64 20 61 |data to D% and a| 000007b0 64 64 72 20 74 6f 20 26 36 33 39 30 2e 0d 0d 64 |ddr to &6390...d| 000007c0 65 64 20 28 31 32 35 30 2c 31 32 36 30 29 20 66 |ed (1250,1260) f| 000007d0 6c 61 73 68 65 73 20 74 68 65 20 6d 61 6e 2e 20 |lashes the man. | 000007e0 64 65 63 72 65 61 73 65 73 20 6c 69 25 20 61 6e |decreases li% an| 000007f0 64 20 69 6e 63 72 65 61 73 65 73 20 64 65 61 64 |d increases dead| 00000800 6d 61 6e 2c 20 77 68 65 6e 0d 79 6f 75 20 6c 6f |man, when.you lo| 00000810 73 65 20 61 20 6c 69 66 65 2e 0d 0d 6d 6f 76 65 |se a life...move| 00000820 20 28 31 32 37 30 2d 31 33 33 30 29 20 72 65 61 | (1270-1330) rea| 00000830 64 73 20 74 68 65 20 6b 65 79 73 2e 20 20 57 69 |ds the keys. Wi| 00000840 74 68 20 41 20 72 65 67 69 73 74 65 72 20 6c 6f |th A register lo| 00000850 61 64 65 64 1a 20 77 69 74 68 20 31 32 39 2c 20 |aded. with 129, | 00000860 59 20 77 69 74 68 0d 26 46 46 20 61 6e 64 20 58 |Y with.&FF and X| 00000870 20 77 69 74 68 20 74 68 65 20 6e 65 67 61 74 69 | with the negati| 00000880 76 65 20 49 4e 4b 45 59 20 76 61 6c 75 65 2c 20 |ve INKEY value, | 00000890 61 66 74 65 72 20 74 68 65 1a 20 63 61 6c 6c 1a |after the. call.| 000008a0 20 74 6f 20 6f 73 62 79 74 65 20 59 3d 30 20 69 | to osbyte Y=0 i| 000008b0 66 0d 74 68 65 20 6b 65 79 20 69 73 20 6e 6f 74 |f.the key is not| 000008c0 20 70 72 65 73 73 65 64 20 61 6e 64 20 2d 31 20 | pressed and -1 | 000008d0 77 68 65 6e 20 70 72 65 73 73 65 64 2e 20 20 49 |when pressed. I| 000008e0 66 20 6e 6f 20 6b 65 79 73 1a 20 61 72 65 1a 20 |f no keys. are. | 000008f0 70 72 65 73 73 65 64 2c 20 61 6c 6c 0d 63 6f 6d |pressed, all.com| 00000900 70 61 72 69 73 6f 6e 73 20 61 72 65 20 65 71 75 |parisons are equ| 00000910 61 6c 20 61 6e 64 20 74 68 65 1a 20 72 6f 75 74 |al and the. rout| 00000920 69 6e 65 1a 20 65 6e 64 73 2e 1a 20 20 49 66 1a |ine. ends.. If.| 00000930 20 61 1a 20 6b 65 79 20 69 73 20 70 72 65 73 73 | a. key is press| 00000940 65 64 2c 20 74 68 65 0d 72 6f 75 74 69 6e 65 20 |ed, the.routine | 00000950 66 6f 72 20 74 68 61 74 20 6b 65 79 20 69 73 20 |for that key is | 00000960 63 61 6c 6c 65 64 20 61 73 20 74 68 65 20 63 6f |called as the co| 00000970 6d 70 61 72 69 73 6f 6e 20 69 73 20 6e 6f 74 20 |mparison is not | 00000980 65 71 75 61 6c 2e 0d 0d 4b 65 79 73 20 51 20 61 |equal...Keys Q a| 00000990 6e 64 20 53 20 63 61 6c 6c 20 74 68 65 20 72 6f |nd S call the ro| 000009a0 75 74 69 6e 65 73 20 73 64 6f 66 66 20 61 6e 64 |utines sdoff and| 000009b0 20 73 64 6f 6e 20 61 73 20 65 78 70 6c 61 69 6e | sdon as explain| 000009c0 65 64 2e 0d 0d 54 68 65 20 45 53 43 41 50 45 1a |ed...The ESCAPE.| 000009d0 20 6b 65 79 20 63 61 6c 6c 73 20 74 68 65 20 72 | key calls the r| 000009e0 6f 75 74 69 6e 65 20 64 65 64 20 61 6e 64 20 72 |outine ded and r| 000009f0 65 70 6c 61 63 65 73 20 74 68 65 20 64 61 74 61 |eplaces the data| 00000a00 20 61 64 64 72 65 73 73 20 77 69 74 68 20 61 0d | address with a.| 00000a10 73 70 61 63 65 2e 0d 0d 54 68 65 20 66 6f 75 72 |space...The four| 00000a20 20 6d 6f 76 65 6d 65 6e 74 20 72 6f 75 74 69 6e | movement routin| 00000a30 65 73 20 28 31 33 34 30 2d 31 34 34 30 29 20 61 |es (1340-1440) a| 00000a40 72 65 20 73 6f 6d 65 77 68 61 74 20 63 6f 6d 70 |re somewhat comp| 00000a50 6c 65 78 2e 20 20 20 20 20 20 20 20 20 20 20 20 |lex. | 00000a60 20 20 0d 49 74 1a 20 69 73 1a 20 66 69 72 73 74 | .It. is. first| 00000a70 1a 20 6e 65 63 65 73 73 61 72 79 1a 20 74 6f 1a |. necessary. to.| 00000a80 20 63 68 65 63 6b 1a 20 74 68 65 1a 20 61 64 64 | check. the. add| 00000a90 72 65 73 73 20 6f 66 20 74 68 65 20 70 6f 73 69 |ress of the posi| 00000aa0 74 69 6f 6e 20 74 6f 20 77 68 69 63 68 0d 6d 6f |tion to which.mo| 00000ab0 76 65 6d 65 6e 74 20 69 73 20 74 6f 20 62 65 20 |vement is to be | 00000ac0 6d 61 64 65 2e 20 20 46 6f 72 20 6c 65 66 74 20 |made. For left | 00000ad0 61 6e 64 1a 20 72 69 67 68 74 1a 20 6d 6f 76 65 |and. right. move| 00000ae0 6d 65 6e 74 1a 20 74 68 69 73 1a 20 69 73 20 2d |ment. this. is -| 00000af0 31 20 61 6e 64 20 2b 31 0d 72 65 6c 61 74 69 76 |1 and +1.relativ| 00000b00 65 20 74 6f 20 74 68 65 20 70 6f 73 69 74 69 6f |e to the positio| 00000b10 6e 20 6f 66 20 74 68 65 20 6d 61 6e 20 61 6e 64 |n of the man and| 00000b20 20 66 6f 72 20 75 70 20 61 6e 64 20 64 6f 77 6e | for up and down| 00000b30 1a 20 74 68 65 79 1a 20 61 72 65 20 2d 32 34 20 |. they. are -24 | 00000b40 61 6e 64 0d 2b 32 34 2e 1a 20 20 49 20 75 73 65 |and.+24.. I use| 00000b50 64 20 74 68 65 20 69 6e 64 65 78 65 64 20 61 64 |d the indexed ad| 00000b60 64 72 65 73 73 69 6e 67 20 4c 44 41 28 6d 70 29 |dressing LDA(mp)| 00000b70 2c 59 20 74 6f 20 64 6f 20 74 68 69 73 20 61 6e |,Y to do this an| 00000b80 64 20 74 6f 20 61 76 6f 69 64 20 74 68 65 0d 6e |d to avoid the.n| 00000b90 65 67 61 74 69 76 65 20 76 61 6c 75 65 73 2c 20 |egative values, | 00000ba0 77 68 69 63 68 20 61 72 65 20 6e 6f 74 1a 20 70 |which are not. p| 00000bb0 65 72 6d 69 73 73 69 62 6c 65 2c 1a 20 49 1a 20 |ermissible,. I. | 00000bc0 73 65 74 1a 20 59 1a 20 74 6f 20 34 38 20 73 6f |set. Y. to 48 so| 00000bd0 20 74 68 61 74 20 74 68 65 0d 61 64 64 72 65 73 | that the.addres| 00000be0 73 20 69 6e 20 6d 70 20 2b 34 38 20 70 6f 69 6e |s in mp +48 poin| 00000bf0 74 73 20 74 6f 20 74 68 65 20 61 64 64 72 65 73 |ts to the addres| 00000c00 73 20 6f 66 20 74 68 65 1a 20 6d 61 6e 2e 1a 20 |s of the. man.. | 00000c10 20 54 68 65 20 61 64 64 72 65 73 73 20 68 65 6c | The address hel| 00000c20 64 20 69 6e 0d 6d 70 20 69 73 20 63 61 6c 63 75 |d in.mp is calcu| 00000c30 6c 61 74 65 64 20 61 73 20 74 68 65 20 61 64 64 |lated as the add| 00000c40 72 65 73 73 20 6f 66 20 74 68 65 20 6d 61 6e 20 |ress of the man | 00000c50 6d 69 6e 75 73 20 34 38 2e 20 20 57 69 74 68 1a |minus 48. With.| 00000c60 20 59 3d 34 37 20 77 69 6c 6c 20 74 68 65 6e 0d | Y=47 will then.| 00000c70 70 6f 69 6e 74 1a 20 74 6f 20 74 68 65 20 70 6f |point. to the po| 00000c80 73 69 74 69 6f 6e 20 6f 6e 20 74 68 65 20 6c 65 |sition on the le| 00000c90 66 74 20 61 6e 64 20 59 3d 34 39 20 74 68 61 74 |ft and Y=49 that| 00000ca0 20 6f 6e 20 74 68 65 20 72 69 67 68 74 2e 20 20 | on the right. | 00000cb0 53 69 6d 69 6c 61 72 6c 79 2c 0d 59 3d 32 34 20 |Similarly,.Y=24 | 00000cc0 70 6f 69 6e 74 73 20 74 6f 20 74 68 65 20 6f 6e |points to the on| 00000cd0 65 20 61 62 6f 76 65 20 61 6e 64 20 59 3d 37 32 |e above and Y=72| 00000ce0 20 74 6f 20 74 68 65 20 6f 6e 65 20 62 65 6c 6f | to the one belo| 00000cf0 77 2e 0d 45 61 63 68 20 72 6f 75 74 69 6e 65 1a |w..Each routine.| 00000d00 20 66 69 72 73 74 1a 20 63 61 6c 63 75 6c 61 74 | first. calculat| 00000d10 65 73 1a 20 74 68 65 1a 20 61 64 64 72 65 73 73 |es. the. address| 00000d20 1a 20 74 6f 1a 20 62 65 1a 20 68 65 6c 64 20 69 |. to. be. held i| 00000d30 6e 20 6d 70 20 77 69 74 68 20 74 68 65 0d 72 6f |n mp with the.ro| 00000d40 75 74 69 6e 65 20 6d 70 6f 73 20 61 6e 64 20 63 |utine mpos and c| 00000d50 68 65 63 6b 73 20 74 68 65 20 72 65 6c 65 76 61 |hecks the releva| 00000d60 6e 74 20 61 64 64 72 65 73 73 20 61 73 20 65 78 |nt address as ex| 00000d70 70 6c 61 69 6e 65 64 20 61 62 6f 76 65 2e 20 20 |plained above. | 00000d80 54 68 65 6e 20 74 68 65 0d 66 6f 6c 6c 6f 77 69 |Then the.followi| 00000d90 6e 67 20 63 6f 6d 70 61 72 69 73 6f 6e 73 20 61 |ng comparisons a| 00000da0 72 65 20 6d 61 64 65 20 2d 0d 0d 20 20 20 20 20 |re made -.. | 00000db0 43 4d 50 23 32 33 31 20 28 73 61 66 65 29 20 2d |CMP#231 (safe) -| 00000dc0 20 69 66 20 65 71 75 61 6c 2c 20 63 61 6e 6e 6f | if equal, canno| 00000dd0 74 20 6d 6f 76 65 0d 20 20 20 20 20 69 66 20 67 |t move. if g| 00000de0 72 65 61 74 65 72 20 28 63 61 72 72 79 20 66 6c |reater (carry fl| 00000df0 61 67 20 73 65 74 29 20 69 65 20 4b 65 79 20 63 |ag set) ie Key c| 00000e00 6f 6c 6c 65 63 74 65 64 20 2d 20 6a 75 6d 70 20 |ollected - jump | 00000e10 63 68 67 20 74 6f 20 63 61 6c 6c 20 54 25 0d 20 |chg to call T%. | 00000e20 20 20 20 20 43 4d 50 23 32 32 34 20 28 62 72 69 | CMP#224 (bri| 00000e30 63 6b 29 20 2d 20 69 66 20 65 71 75 61 6c 2c 20 |ck) - if equal, | 00000e40 63 61 6e 6e 6f 74 20 6d 6f 76 65 0d 20 20 20 20 |cannot move. | 00000e50 20 43 4d 50 23 32 32 35 20 28 72 6f 63 6b 29 20 | CMP#225 (rock) | 00000e60 2d 20 69 66 20 75 70 20 6f 72 20 64 6f 77 6e 20 |- if up or down | 00000e70 61 6e 64 20 65 71 75 61 6c 20 2d 20 63 61 6e 6e |and equal - cann| 00000e80 6f 74 20 6d 6f 76 65 0d 20 20 20 20 20 20 20 20 |ot move. | 00000e90 20 20 20 20 20 20 20 20 20 20 20 20 2d 20 69 66 | - if| 00000ea0 20 6c 65 66 74 20 6f 72 20 72 69 67 68 74 2c 20 | left or right, | 00000eb0 63 68 65 63 6b 20 6e 65 78 74 20 61 64 64 72 65 |check next addre| 00000ec0 73 73 0d 20 20 20 20 20 20 20 20 20 20 20 20 20 |ss. | 00000ed0 20 20 20 20 20 20 20 20 20 69 66 20 6e 6f 74 20 | if not | 00000ee0 32 32 39 20 28 73 70 61 63 65 29 2c 20 63 61 6e |229 (space), can| 00000ef0 6e 6f 74 20 6d 6f 76 65 0d 20 20 20 20 20 20 20 |not move. | 00000f00 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 65 | e| 00000f10 6c 73 65 20 6d 6f 76 65 20 72 6f 63 6b 0d 20 20 |lse move rock. | 00000f20 20 20 20 43 4d 50 23 32 32 37 20 28 6d 75 73 68 | CMP#227 (mush| 00000f30 72 6f 6f 6d 29 20 2d 20 69 66 20 65 71 75 61 6c |room) - if equal| 00000f40 2c 20 4a 4d 50 20 64 65 64 0d 20 20 20 20 20 43 |, JMP ded. C| 00000f50 4d 50 23 32 32 36 20 28 64 69 61 6d 6f 6e 64 29 |MP#226 (diamond)| 00000f60 20 2d 20 69 66 20 65 71 75 61 6c 2c 20 4a 53 52 | - if equal, JSR| 00000f70 64 69 73 2c 20 6d 6f 76 65 0d 20 20 20 20 20 43 |dis, move. C| 00000f80 4d 50 23 32 32 38 20 28 65 61 72 74 68 29 20 2d |MP#228 (earth) -| 00000f90 20 69 66 20 65 71 75 61 6c 2c 20 4a 53 52 65 61 | if equal, JSRea| 00000fa0 73 2c 20 6d 6f 76 65 0d 20 20 20 20 20 20 20 20 |s, move. | 00000fb0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 65 | e| 00000fc0 6c 73 65 20 6d 6f 76 65 0d 0d 57 68 65 6e 1a 20 |lse move..When. | 00000fd0 61 20 6d 6f 76 65 20 69 73 20 6d 61 64 65 20 74 |a move is made t| 00000fe0 68 65 20 63 68 61 72 61 63 74 65 72 20 69 6e 20 |he character in | 00000ff0 6d 65 6d 6f 72 79 1a 20 69 73 1a 20 72 65 70 6c |memory. is. repl| 00001000 61 63 65 64 1a 20 77 69 74 68 1a 20 61 1a 20 73 |aced. with. a. s| 00001010 70 61 63 65 0d 63 68 61 72 61 63 74 65 72 20 61 |pace.character a| 00001020 6e 64 20 74 68 65 20 76 61 72 69 61 62 6c 65 73 |nd the variables| 00001030 20 72 65 2d 63 61 6c 63 75 6c 61 74 65 64 20 61 | re-calculated a| 00001040 6e 64 20 74 68 65 20 64 69 73 70 61 79 20 72 65 |nd the dispay re| 00001050 64 72 61 77 6e 2e 0d 0d 72 65 70 20 28 31 34 35 |drawn...rep (145| 00001060 30 29 20 77 61 69 74 73 20 66 6f 72 20 73 70 61 |0) waits for spa| 00001070 63 65 20 74 6f 20 62 65 20 70 72 65 73 73 65 64 |ce to be pressed| 00001080 2e 0d 0d 67 61 6d 65 6e 64 20 28 31 34 36 30 2d |...gamend (1460-| 00001090 31 34 38 30 29 20 70 72 69 6e 74 73 20 74 68 65 |1480) prints the| 000010a0 20 66 69 6e 61 6c 20 6d 65 73 73 61 67 65 20 28 | final message (| 000010b0 44 41 54 41 20 6c 69 6e 65 73 20 31 39 38 30 2d |DATA lines 1980-| 000010c0 32 30 31 30 29 2c 20 73 74 61 72 74 73 0d 74 68 |2010), starts.th| 000010d0 65 20 74 75 6e 65 20 77 69 74 68 20 2a 46 58 31 |e tune with *FX1| 000010e0 34 2c 34 20 61 6e 64 20 61 73 6b 73 20 69 66 20 |4,4 and asks if | 000010f0 79 6f 75 20 77 61 6e 74 20 61 6e 6f 74 68 65 72 |you want another| 00001100 20 67 61 6d 65 2e 20 20 54 68 65 6e 20 77 61 69 | game. Then wai| 00001110 74 73 20 66 6f 72 20 59 0d 6f 72 20 4e 20 74 6f |ts for Y.or N to| 00001120 20 62 65 20 70 72 65 73 73 65 64 2e 0d 0d 6d 6c | be pressed...ml| 00001130 6f 61 64 20 28 31 34 39 30 2d 31 35 37 30 29 20 |oad (1490-1570) | 00001140 66 69 72 73 74 1a 20 70 72 69 6e 74 1a 20 61 1a |first. print. a.| 00001150 20 6d 65 73 73 61 67 65 1a 20 61 73 6b 69 6e 67 | message. asking| 00001160 1a 20 66 6f 72 1a 20 74 68 65 20 73 75 66 66 69 |. for. the suffi| 00001170 78 20 6e 75 6d 62 65 72 0d 28 31 2d 35 29 2e 1a |x number.(1-5)..| 00001180 20 20 41 66 74 65 72 1a 20 70 72 65 73 73 69 6e | After. pressin| 00001190 67 1a 20 74 68 65 20 6e 75 6d 62 65 72 20 6b 65 |g. the number ke| 000011a0 79 2c 20 74 68 65 20 6e 75 6d 62 65 72 20 69 73 |y, the number is| 000011b0 1a 20 69 6e 73 65 72 74 65 64 1a 20 69 6e 1a 20 |. inserted. in. | 000011c0 74 68 65 0d 6c 6f 61 64 69 6e 67 20 6d 65 73 73 |the.loading mess| 000011d0 61 67 65 20 28 44 41 54 41 20 6c 69 6e 65 20 32 |age (DATA line 2| 000011e0 30 38 30 29 1a 20 61 6e 64 1a 20 69 6e 1a 20 74 |080). and. in. t| 000011f0 68 65 1a 20 6c 6f 61 64 69 6e 67 20 63 6f 6d 6d |he. loading comm| 00001200 61 6e 64 20 28 44 41 54 41 20 6c 69 6e 65 0d 32 |and (DATA line.2| 00001210 30 39 30 29 20 66 6f 72 20 74 68 65 20 66 69 6c |090) for the fil| 00001220 65 20 74 6f 20 62 65 20 6c 6f 61 64 65 64 2e 0d |e to be loaded..| 00001230 0d 4c 69 6e 65 73 20 31 35 38 30 20 2d 20 31 36 |.Lines 1580 - 16| 00001240 31 30 20 6d 61 6b 65 20 73 70 61 63 65 20 66 6f |10 make space fo| 00001250 72 20 74 68 65 20 76 61 72 69 61 62 6c 65 73 2e |r the variables.| 00001260 0d |.| 00001261
F/M\Ctut2.m0
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