Home » Personal collection » Acorn DFS disks » dfs_box03_disk12_bcpl.scp » OPT
OPT
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 DFS disks » dfs_box03_disk12_bcpl.scp |
| Filename: | OPT |
| Read OK: | ✔ |
| File size: | 0386 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
/* Section commented out in case it is not needed
SECTION "OPTION"
// contains GETBYTE,PACKSTRING,PUTBYTE,UNPACKSTRING
// these standard procedures are unnecessary for new code.
// The remainder are easily provided by the % operator.
// Modified 8/7/82 by E.Allen for BBC Micro
GET "LIBHDR"
GET "SYSHDR"
// if OPTION is a separate segment it is necessary to allocate
// Globals for the procedures required, and declare or
// reference them here.
*/
// if "OPTION" is included as local procedures within a section
// the next LET may need to be changed to AND.
LET GETBYTE(S, I) = S%I
AND PACKSTRING(V, S) = VALOF
$( LET N = V!0 & 255
LET I = N/2
FOR P = 0 TO N DO S%P:=V!P
IF (N&1)=0 DO S%(N+1) := 0
RESULTIS I $)
AND PUTBYTE(S, I, B) BE S%I := B
AND UNPACKSTRING(S, V) BE
FOR I = 0 TO S%0 DO V!I := S%I
00000000 2f 2a 20 53 65 63 74 69 6f 6e 20 63 6f 6d 6d 65 |/* Section comme| 00000010 6e 74 65 64 20 6f 75 74 20 69 6e 20 63 61 73 65 |nted out in case| 00000020 20 69 74 20 69 73 20 6e 6f 74 20 6e 65 65 64 65 | it is not neede| 00000030 64 0d 0a 0d 0a 53 45 43 54 49 4f 4e 20 22 4f 50 |d....SECTION "OP| 00000040 54 49 4f 4e 22 0d 0a 0d 0a 2f 2f 20 63 6f 6e 74 |TION"....// cont| 00000050 61 69 6e 73 20 47 45 54 42 59 54 45 2c 50 41 43 |ains GETBYTE,PAC| 00000060 4b 53 54 52 49 4e 47 2c 50 55 54 42 59 54 45 2c |KSTRING,PUTBYTE,| 00000070 55 4e 50 41 43 4b 53 54 52 49 4e 47 0d 0a 2f 2f |UNPACKSTRING..//| 00000080 20 74 68 65 73 65 20 73 74 61 6e 64 61 72 64 20 | these standard | 00000090 70 72 6f 63 65 64 75 72 65 73 20 61 72 65 20 75 |procedures are u| 000000a0 6e 6e 65 63 65 73 73 61 72 79 20 66 6f 72 20 6e |nnecessary for n| 000000b0 65 77 20 63 6f 64 65 2e 0d 0a 2f 2f 20 54 68 65 |ew code...// The| 000000c0 20 72 65 6d 61 69 6e 64 65 72 20 61 72 65 20 65 | remainder are e| 000000d0 61 73 69 6c 79 20 70 72 6f 76 69 64 65 64 20 62 |asily provided b| 000000e0 79 20 74 68 65 20 25 20 6f 70 65 72 61 74 6f 72 |y the % operator| 000000f0 2e 0d 0a 2f 2f 20 4d 6f 64 69 66 69 65 64 20 38 |...// Modified 8| 00000100 2f 37 2f 38 32 20 62 79 20 45 2e 41 6c 6c 65 6e |/7/82 by E.Allen| 00000110 20 66 6f 72 20 42 42 43 20 4d 69 63 72 6f 0d 0a | for BBC Micro..| 00000120 0d 0a 0d 0a 47 45 54 20 22 4c 49 42 48 44 52 22 |....GET "LIBHDR"| 00000130 0d 0a 47 45 54 20 22 53 59 53 48 44 52 22 0d 0a |..GET "SYSHDR"..| 00000140 2f 2f 20 69 66 20 4f 50 54 49 4f 4e 20 69 73 20 |// if OPTION is | 00000150 61 20 73 65 70 61 72 61 74 65 20 73 65 67 6d 65 |a separate segme| 00000160 6e 74 20 69 74 20 69 73 20 6e 65 63 65 73 73 61 |nt it is necessa| 00000170 72 79 20 74 6f 20 61 6c 6c 6f 63 61 74 65 0d 0a |ry to allocate..| 00000180 2f 2f 20 47 6c 6f 62 61 6c 73 20 66 6f 72 20 74 |// Globals for t| 00000190 68 65 20 70 72 6f 63 65 64 75 72 65 73 20 72 65 |he procedures re| 000001a0 71 75 69 72 65 64 2c 20 20 61 6e 64 20 64 65 63 |quired, and dec| 000001b0 6c 61 72 65 20 6f 72 0d 0a 2f 2f 20 72 65 66 65 |lare or..// refe| 000001c0 72 65 6e 63 65 20 74 68 65 6d 20 68 65 72 65 2e |rence them here.| 000001d0 0d 0a 0d 0a 2a 2f 0d 0a 0d 0a 2f 2f 20 69 66 20 |....*/....// if | 000001e0 22 4f 50 54 49 4f 4e 22 20 69 73 20 69 6e 63 6c |"OPTION" is incl| 000001f0 75 64 65 64 20 61 73 20 6c 6f 63 61 6c 20 70 72 |uded as local pr| 00000200 6f 63 65 64 75 72 65 73 20 77 69 74 68 69 6e 20 |ocedures within | 00000210 61 20 73 65 63 74 69 6f 6e 20 0d 0a 2f 2f 20 74 |a section ..// t| 00000220 68 65 20 6e 65 78 74 20 4c 45 54 20 6d 61 79 20 |he next LET may | 00000230 6e 65 65 64 20 74 6f 20 62 65 20 63 68 61 6e 67 |need to be chang| 00000240 65 64 20 74 6f 20 41 4e 44 2e 0d 0a 0d 0a 0d 0a |ed to AND.......| 00000250 4c 45 54 20 47 45 54 42 59 54 45 28 53 2c 20 49 |LET GETBYTE(S, I| 00000260 29 20 3d 20 53 25 49 0d 0a 0d 0a 0d 0a 41 4e 44 |) = S%I......AND| 00000270 20 50 41 43 4b 53 54 52 49 4e 47 28 56 2c 20 53 | PACKSTRING(V, S| 00000280 29 20 3d 20 56 41 4c 4f 46 0d 0a 20 20 20 20 24 |) = VALOF.. $| 00000290 28 20 4c 45 54 20 4e 20 3d 20 56 21 30 20 26 20 |( LET N = V!0 & | 000002a0 32 35 35 0d 0a 20 20 20 20 20 20 20 4c 45 54 20 |255.. LET | 000002b0 49 20 3d 20 4e 2f 32 0d 0a 20 20 20 20 20 20 20 |I = N/2.. | 000002c0 46 4f 52 20 50 20 3d 20 30 20 54 4f 20 4e 20 44 |FOR P = 0 TO N D| 000002d0 4f 20 53 25 50 3a 3d 56 21 50 0d 0a 20 20 20 20 |O S%P:=V!P.. | 000002e0 20 20 20 49 46 20 28 4e 26 31 29 3d 30 20 44 4f | IF (N&1)=0 DO| 000002f0 20 53 25 28 4e 2b 31 29 20 3a 3d 20 30 0d 0a 20 | S%(N+1) := 0.. | 00000300 20 20 20 20 20 20 52 45 53 55 4c 54 49 53 20 49 | RESULTIS I| 00000310 20 20 24 29 0d 0a 0d 0a 0d 0a 41 4e 44 20 50 55 | $)......AND PU| 00000320 54 42 59 54 45 28 53 2c 20 49 2c 20 42 29 20 42 |TBYTE(S, I, B) B| 00000330 45 20 53 25 49 20 3a 3d 20 42 0d 0a 0d 0a 0d 0a |E S%I := B......| 00000340 41 4e 44 20 55 4e 50 41 43 4b 53 54 52 49 4e 47 |AND UNPACKSTRING| 00000350 28 53 2c 20 56 29 20 42 45 0d 0a 20 20 20 20 20 |(S, V) BE.. | 00000360 20 20 20 20 46 4f 52 20 49 20 3d 20 30 20 54 4f | FOR I = 0 TO| 00000370 20 53 25 30 20 44 4f 20 56 21 49 20 3a 3d 20 53 | S%0 DO V!I := S| 00000380 25 49 0d 0a 0d 0a |%I....| 00000386
OPT.m0
OPT.m1
OPT.m2
OPT.m4
OPT.m5
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