Home » Archimedes archive » Acorn Computing » 1994 04 subscription disc.adf » 9404s » Miscellany/RunVar/RunVarSrc
Miscellany/RunVar/RunVarSrc
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 » Archimedes archive » Acorn Computing » 1994 04 subscription disc.adf » 9404s |
| Filename: | Miscellany/RunVar/RunVarSrc |
| Read OK: | ✔ |
| File size: | 2D35 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
; Source code for RunVar module
; (c) Acorn Computing 1994
; written by David J Seery
; This module creates a system variable of the form File_XXX$Dir for
; each file run, where XXX is the filetype, and the variable is set to the
; directory from which the file was run.
; I've tried to comment out this source as it is not really to complicated
; and non-ARM code programmers might wish to have a look at it. If the
; syntax is different to the BASIC assembler, it is because I use my own
; assembler to make life easier - it multitasks from the desktop.
; -------------------------------------------------------------------------
dcd 0 ; No start up code
dcd initialise ; OFFSET to initialisation code
dcd finalise ; OFFSET to finalisation code
dcd service ; OFFSET to service call handler
; code
dcd title ; Our title string (OFFSET)
dcd help ; Out help string (OFFSET)
dcd 0 ; No star commands
dcd 0 ; No SWI chunk number
dcd 0 ; No SWI handling code
dcd 0 ; No SWI decoding table
dcd 0 ; No SWI decoding code
; --------------------------------------------------------------------------
title dcb "RunVar",0
align
help dcb "RunVar"
dcb 9
dcb 9 ; Note the presence of TWO tab
; characters. This is so that
; the layout of *Help Modules on
; screen is consistent as RunVar
; is <8 characters.
dcb "0.86 (03 Dec 1993)",0
align
; --------------------------------------------------------------------------
initialise stmfd r13!,{r0-r8,r14} ; Stack registers
mov r0,#&f ; =15 FSControlV
adr r1,fscontrolv ; Address of our code
mov r2,#0 ; Enter with r12 = 0
swi "OS_Claim" ; Claim the vector
mov r0,#8 ; =8 FileV
adr r1,filev ; Address of our code
mov r2,#0 ; Enter with r12 = 0
swi "OS_Claim" ; Claim the vector
ldmfd r13!,{r0-r8,pc} ; Re-load registers and exit
finalise stmfd r13!,{r0-r8,r14} ; Stack registers
mov r0,#&f ; =15 FSControlV
adr r1,fscontrolv ; Address of our code
mov r2,#0 ; For completeness
swi "OS_Release" ; Release claim on vector
mov r0,#8 ; =8 FileV
adr r1,filev ; Address of our code
mov r2,#0 ; For completeness
swi "OS_Release" ; Release claim on vector
ldmfd r13!,{r0-r8,pc} ; Re-load registers and exit
service cmp r1,#&27 ; Is this a machine reset ?
movne pc,r14 ; If not, we don't want to know
stmfd r13!,{r0-r11,r14} ; Store ALL registers - must be
; preserved !
mov r0,#&f ; Yet again, FSControlV
adr r1,fscontrolv ; And the address of our code
mov r2,#0 ; Enter with r12 = 0
swi "OS_Claim" ; Claim the vector. Why?
; Well, a reset releases all
; vector claims so we have to
; reinstate them
mov r0,#8 ; =8 FileV
adr r1,filev ; Address of our code
mov r2,#0 ; Enter with r12 = 0
swi "OS_Claim" ; Claim the vector
ldmfd r13!,{r0-r11,pc} ; Re-load registers and exit
; --------------------------------------------------------------------------
; This is the main part of the code and is called whenever a OS_FSControl
; SWI is passed to the OS. We check to see if it is to do with *RUNning
; a file (reason code 4) and if it is then we perform a bit of pre-processing
; and create (or alter) the appropriate system variable.
fscontrolv cmp r0,#4 ; Is it *RUN file ?
movne pc,r14 ; If not, pass it on
stmfd r13!,{r0-r9,r14} ; Store registers
adr r6,first_bit ; Get address of RunFile bit
mov r7,#ASC" " ; Space
strb r7,[r6],#1 ; Store it
mov r7,#ASC"R" ; R
strb r7,[r6],#1 ; Store it
mov r7,#ASC"u" ; u
strb r7,[r6],#1 ; Store it
mov r7,#ASC"n" ; n
strb r7,[r6],#1 ; Store it
do_var_bit mov r8,r1 ; Make a copy of filename pointer
mov r0,#5 ; Set to info on file
swi "XOS_File" ; Get the data
ldmvsfd r13!,{r0-r8,pc} ; If there is a problem, exit
mov r2,r2,lsr #8 ; Shift the load address right
; 8 times
ldr r3,num_fff ; Get the constant 4095 (&FFF)
and r2,r2,r3 ; Logically AND the shifted-right
; load address with 4095 (&FFF)
mov r0,r2 ; Set r0 to processed load address
adr r1,buffer ; Set r1 to point to a buffer
mov r2,#8 ; Set r2 to maximum size of buffer
swi "OS_ConvertHex4" ; Convert r0 to a hex number
; What is the point of all the above arithmetic ? What it actually comes
; down to is that the operating system stores the filetype in the load
; address of a file - on the old BBC this was the address (in memory) where
; the file was loaded to if no other address was specified. It takes the
; form -
; FFFtttddd
; Where the FFF is an actual constant, the ttt refers to the file type, and
; the ddd is part of the date stamp. As an example, a file might have the
; address -
; FFFFF93A9
; And from this we can see that the file type is FF9 - a sprite file. If
; we shift right 8 times and AND this with &FFF then we can obtain FF9 on
; its own.
adr r1,run_type ; Set r1 to point to variable
; type section (the XXX of
; File_XXX$Dir)
ldrb r2,[r0,#1] ; Get first byte
strb r2,[r1,#0] ; And store it
ldrb r2,[r0,#2] ; Get second byte
strb r2,[r1,#1] ; And store it
ldrb r2,[r0,#3] ; Get third byte
strb r2,[r1,#2] ; And store it
mov r1,r8 ; Get our copy of the filename
mov r9,#0 ; Set a flag to 0 - see later
find_end ldrb r2,[r1],#1 ; Get a byte...
cmp r2,#ASC"." ; Is it a dot ?
moveq r9,#1 ; If it is, set the flag to 1
cmp r2,#32 ; Compare it with ASCII 32...
bgt find_end ; If greater than, branch back.
; r1 now points to the byte after
; the end of string marker
cmp r9,#1 ; Is there a dot in the string ?
ldmnefd r13!,{r0-r9,pc} ; If not, exit, because we can't
; set the variable to a directory
; name (safeguard feature)
sub r1,r1,#1 ; Now points to end of string
find_dot ldrb r2,[r1],#-1 ; Get a byte...
cmp r2,#ASC"." ; Compare it with ASCII for "."
bne find_dot ; If not, branch back
mov r2,#0 ; End of string marker
strb r2,[r1,#1] ; Store it
mov r9,r1 ; Make a copy of the address
adr r0,run_val ; Get address of value slot
mov r1,r8 ; Get copy of filename
make_copy ldrb r2,[r1],#1 ; Get a byte...
cmp r2,#32 ; Compare it with ASCII 32
strb r2,[r0],#1 ; Store it...
bgt make_copy ; If greater than, branch back
adr r0,run_var ; Get address of CLI string
swi "OS_CLI" ; Set the variable value
mov r2,#ASC"." ; Make r2 = "."
strb r2,[r9,#1] ; And store it over the end of
; string marker
ldmfd r13!,{r0-r9,pc} ; Re-load registers and pass on
; the call
; --------------------------------------------------------------------------
; This is the second important part of the code and is called when an OS_File
; is discovered. It checks if it is load file (&ff) and if it is it sets
; a variable LoadFile_XXX$Dir to the directory of the file, as above
filev cmp r0,#&ff ; Is it load file ?
cmpne r0,#&c ; Another sort of load
cmpne r0,#&e ; Yet another
cmpne r0,#&10 ; And another
movne pc,r14 ; If it isn't, go away!
stmfd r13!,{r0-r9,r14} ; Store registers
adr r6,first_bit ; Get address of LoadFile bit
mov r7,#ASC"L" ; L
strb r7,[r6],#1 ; Store it
mov r7,#ASC"o" ; o
strb r7,[r6],#1 ; Store it
mov r7,#ASC"a" ; a
strb r7,[r6],#1 ; Store it
mov r7,#ASC"d" ; d
strb r7,[r6],#1 ; Store it
b do_var_bit ; Create the variable
num_fff dcd &fff ; A constant
.buffer dcd 0:dcd 0 ; Space for conversion
run_var dcb "Set "
first_bit dcb " Run"
second_bit dcb "File_"
run_type dcb 0:dcb 0:dcb 0 ; Variable name
dcb "$Dir "
run_val equs STRING$(100,CHR$0) 00000000 0a 3b 20 53 6f 75 72 63 65 20 63 6f 64 65 20 66 |.; Source code f|
00000010 6f 72 20 52 75 6e 56 61 72 20 6d 6f 64 75 6c 65 |or RunVar module|
00000020 0a 0a 3b 20 28 63 29 20 41 63 6f 72 6e 20 43 6f |..; (c) Acorn Co|
00000030 6d 70 75 74 69 6e 67 20 31 39 39 34 0a 3b 20 77 |mputing 1994.; w|
00000040 72 69 74 74 65 6e 20 62 79 20 44 61 76 69 64 20 |ritten by David |
00000050 4a 20 53 65 65 72 79 0a 0a 3b 20 54 68 69 73 20 |J Seery..; This |
00000060 6d 6f 64 75 6c 65 20 63 72 65 61 74 65 73 20 61 |module creates a|
00000070 20 73 79 73 74 65 6d 20 76 61 72 69 61 62 6c 65 | system variable|
00000080 20 6f 66 20 74 68 65 20 66 6f 72 6d 20 46 69 6c | of the form Fil|
00000090 65 5f 58 58 58 24 44 69 72 20 66 6f 72 0a 3b 20 |e_XXX$Dir for.; |
000000a0 65 61 63 68 20 66 69 6c 65 20 72 75 6e 2c 20 77 |each file run, w|
000000b0 68 65 72 65 20 58 58 58 20 69 73 20 74 68 65 20 |here XXX is the |
000000c0 66 69 6c 65 74 79 70 65 2c 20 61 6e 64 20 74 68 |filetype, and th|
000000d0 65 20 76 61 72 69 61 62 6c 65 20 69 73 20 73 65 |e variable is se|
000000e0 74 20 74 6f 20 74 68 65 0a 3b 20 64 69 72 65 63 |t to the.; direc|
000000f0 74 6f 72 79 20 66 72 6f 6d 20 77 68 69 63 68 20 |tory from which |
00000100 74 68 65 20 66 69 6c 65 20 77 61 73 20 72 75 6e |the file was run|
00000110 2e 0a 0a 3b 20 49 27 76 65 20 74 72 69 65 64 20 |...; I've tried |
00000120 74 6f 20 63 6f 6d 6d 65 6e 74 20 6f 75 74 20 74 |to comment out t|
00000130 68 69 73 20 73 6f 75 72 63 65 20 61 73 20 69 74 |his source as it|
00000140 20 69 73 20 6e 6f 74 20 72 65 61 6c 6c 79 20 74 | is not really t|
00000150 6f 20 63 6f 6d 70 6c 69 63 61 74 65 64 0a 3b 20 |o complicated.; |
00000160 61 6e 64 20 6e 6f 6e 2d 41 52 4d 20 63 6f 64 65 |and non-ARM code|
00000170 20 70 72 6f 67 72 61 6d 6d 65 72 73 20 6d 69 67 | programmers mig|
00000180 68 74 20 77 69 73 68 20 74 6f 20 68 61 76 65 20 |ht wish to have |
00000190 61 20 6c 6f 6f 6b 20 61 74 20 69 74 2e 20 20 49 |a look at it. I|
000001a0 66 20 74 68 65 0a 3b 20 73 79 6e 74 61 78 20 69 |f the.; syntax i|
000001b0 73 20 64 69 66 66 65 72 65 6e 74 20 74 6f 20 74 |s different to t|
000001c0 68 65 20 42 41 53 49 43 20 61 73 73 65 6d 62 6c |he BASIC assembl|
000001d0 65 72 2c 20 69 74 20 69 73 20 62 65 63 61 75 73 |er, it is becaus|
000001e0 65 20 49 20 75 73 65 20 6d 79 20 6f 77 6e 0a 3b |e I use my own.;|
000001f0 20 61 73 73 65 6d 62 6c 65 72 20 74 6f 20 6d 61 | assembler to ma|
00000200 6b 65 20 6c 69 66 65 20 65 61 73 69 65 72 20 2d |ke life easier -|
00000210 20 69 74 20 6d 75 6c 74 69 74 61 73 6b 73 20 66 | it multitasks f|
00000220 72 6f 6d 20 74 68 65 20 64 65 73 6b 74 6f 70 2e |rom the desktop.|
00000230 0a 0a 3b 20 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |..; ------------|
00000240 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000270 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 0a 20 |-------------.. |
00000280 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 64 | d|
00000290 63 64 20 20 20 20 20 20 30 20 20 20 20 20 20 20 |cd 0 |
000002a0 20 20 20 20 20 20 20 20 20 20 3b 20 4e 6f 20 73 | ; No s|
000002b0 74 61 72 74 20 75 70 20 63 6f 64 65 0a 20 20 20 |tart up code. |
000002c0 20 20 20 20 20 20 20 20 20 20 20 20 20 64 63 64 | dcd|
000002d0 20 20 20 20 20 20 69 6e 69 74 69 61 6c 69 73 65 | initialise|
000002e0 20 20 20 20 20 20 20 20 3b 20 4f 46 46 53 45 54 | ; OFFSET|
000002f0 20 74 6f 20 69 6e 69 74 69 61 6c 69 73 61 74 69 | to initialisati|
00000300 6f 6e 20 63 6f 64 65 0a 20 20 20 20 20 20 20 20 |on code. |
00000310 20 20 20 20 20 20 20 20 64 63 64 20 20 20 20 20 | dcd |
00000320 20 66 69 6e 61 6c 69 73 65 20 20 20 20 20 20 20 | finalise |
00000330 20 20 20 3b 20 4f 46 46 53 45 54 20 74 6f 20 66 | ; OFFSET to f|
00000340 69 6e 61 6c 69 73 61 74 69 6f 6e 20 63 6f 64 65 |inalisation code|
00000350 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |. |
00000360 20 64 63 64 20 20 20 20 20 20 73 65 72 76 69 63 | dcd servic|
00000370 65 20 20 20 20 20 20 20 20 20 20 20 3b 20 4f 46 |e ; OF|
00000380 46 53 45 54 20 74 6f 20 73 65 72 76 69 63 65 20 |FSET to service |
00000390 63 61 6c 6c 20 68 61 6e 64 6c 65 72 0a 20 20 20 |call handler. |
000003a0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
*
000003c0 20 20 20 20 20 20 20 20 3b 20 63 6f 64 65 0a 20 | ; code. |
000003d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 64 | d|
000003e0 63 64 20 20 20 20 20 20 74 69 74 6c 65 20 20 20 |cd title |
000003f0 20 20 20 20 20 20 20 20 20 20 3b 20 4f 75 72 20 | ; Our |
00000400 74 69 74 6c 65 20 73 74 72 69 6e 67 20 28 4f 46 |title string (OF|
00000410 46 53 45 54 29 0a 20 20 20 20 20 20 20 20 20 20 |FSET). |
00000420 20 20 20 20 20 20 64 63 64 20 20 20 20 20 20 68 | dcd h|
00000430 65 6c 70 20 20 20 20 20 20 20 20 20 20 20 20 20 |elp |
00000440 20 3b 20 4f 75 74 20 68 65 6c 70 20 73 74 72 69 | ; Out help stri|
00000450 6e 67 20 28 4f 46 46 53 45 54 29 0a 20 20 20 20 |ng (OFFSET). |
00000460 20 20 20 20 20 20 20 20 20 20 20 20 64 63 64 20 | dcd |
00000470 20 20 20 20 20 30 20 20 20 20 20 20 20 20 20 20 | 0 |
00000480 20 20 20 20 20 20 20 3b 20 4e 6f 20 73 74 61 72 | ; No star|
00000490 20 63 6f 6d 6d 61 6e 64 73 0a 20 20 20 20 20 20 | commands. |
000004a0 20 20 20 20 20 20 20 20 20 20 64 63 64 20 20 20 | dcd |
000004b0 20 20 20 30 20 20 20 20 20 20 20 20 20 20 20 20 | 0 |
000004c0 20 20 20 20 20 3b 20 4e 6f 20 53 57 49 20 63 68 | ; No SWI ch|
000004d0 75 6e 6b 20 6e 75 6d 62 65 72 0a 20 20 20 20 20 |unk number. |
000004e0 20 20 20 20 20 20 20 20 20 20 20 64 63 64 20 20 | dcd |
000004f0 20 20 20 20 30 20 20 20 20 20 20 20 20 20 20 20 | 0 |
00000500 20 20 20 20 20 20 3b 20 4e 6f 20 53 57 49 20 68 | ; No SWI h|
00000510 61 6e 64 6c 69 6e 67 20 63 6f 64 65 0a 20 20 20 |andling code. |
00000520 20 20 20 20 20 20 20 20 20 20 20 20 20 64 63 64 | dcd|
00000530 20 20 20 20 20 20 30 20 20 20 20 20 20 20 20 20 | 0 |
00000540 20 20 20 20 20 20 20 20 3b 20 4e 6f 20 53 57 49 | ; No SWI|
00000550 20 64 65 63 6f 64 69 6e 67 20 74 61 62 6c 65 0a | decoding table.|
00000560 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000570 64 63 64 20 20 20 20 20 20 30 20 20 20 20 20 20 |dcd 0 |
00000580 20 20 20 20 20 20 20 20 20 20 20 3b 20 4e 6f 20 | ; No |
00000590 53 57 49 20 64 65 63 6f 64 69 6e 67 20 63 6f 64 |SWI decoding cod|
000005a0 65 0a 0a 3b 20 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |e..; -----------|
000005b0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
000005e0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a |---------------.|
000005f0 0a 74 69 74 6c 65 20 20 20 20 20 20 20 20 20 20 |.title |
00000600 20 64 63 62 20 20 20 20 20 20 22 52 75 6e 56 61 | dcb "RunVa|
00000610 72 22 2c 30 0a 20 20 20 20 20 20 20 20 20 20 20 |r",0. |
00000620 20 20 20 20 20 61 6c 69 67 6e 0a 0a 68 65 6c 70 | align..help|
00000630 20 20 20 20 20 20 20 20 20 20 20 20 64 63 62 20 | dcb |
00000640 20 20 20 20 20 22 52 75 6e 56 61 72 22 0a 20 20 | "RunVar". |
00000650 20 20 20 20 20 20 20 20 20 20 20 20 20 20 64 63 | dc|
00000660 62 20 20 20 20 20 20 39 0a 20 20 20 20 20 20 20 |b 9. |
00000670 20 20 20 20 20 20 20 20 20 64 63 62 20 20 20 20 | dcb |
00000680 20 20 39 20 20 20 20 20 20 20 20 20 20 20 20 20 | 9 |
00000690 20 20 20 20 3b 20 4e 6f 74 65 20 74 68 65 20 70 | ; Note the p|
000006a0 72 65 73 65 6e 63 65 20 6f 66 20 54 57 4f 20 74 |resence of TWO t|
000006b0 61 62 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 |ab. |
000006c0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000006d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 | ; |
000006e0 63 68 61 72 61 63 74 65 72 73 2e 20 20 54 68 69 |characters. Thi|
000006f0 73 20 69 73 20 73 6f 20 74 68 61 74 0a 20 20 20 |s is so that. |
00000700 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
*
00000720 20 20 20 20 20 20 20 20 3b 20 74 68 65 20 6c 61 | ; the la|
00000730 79 6f 75 74 20 6f 66 20 2a 48 65 6c 70 20 4d 6f |yout of *Help Mo|
00000740 64 75 6c 65 73 20 6f 6e 0a 20 20 20 20 20 20 20 |dules on. |
00000750 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
*
00000770 20 20 20 20 3b 20 73 63 72 65 65 6e 20 69 73 20 | ; screen is |
00000780 63 6f 6e 73 69 73 74 65 6e 74 20 61 73 20 52 75 |consistent as Ru|
00000790 6e 56 61 72 0a 20 20 20 20 20 20 20 20 20 20 20 |nVar. |
000007a0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
*
000007c0 3b 20 69 73 20 3c 38 20 63 68 61 72 61 63 74 65 |; is <8 characte|
000007d0 72 73 2e 0a 20 20 20 20 20 20 20 20 20 20 20 20 |rs.. |
000007e0 20 20 20 20 64 63 62 20 20 20 20 20 20 22 30 2e | dcb "0.|
000007f0 38 36 20 28 30 33 20 44 65 63 20 31 39 39 33 29 |86 (03 Dec 1993)|
00000800 22 2c 30 0a 20 20 20 20 20 20 20 20 20 20 20 20 |",0. |
00000810 20 20 20 20 61 6c 69 67 6e 0a 0a 3b 20 2d 2d 2d | align..; ---|
00000820 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000860 2d 2d 2d 2d 2d 2d 2d 0a 0a 69 6e 69 74 69 61 6c |-------..initial|
00000870 69 73 65 20 20 20 20 20 20 73 74 6d 66 64 20 20 |ise stmfd |
00000880 20 20 72 31 33 21 2c 7b 72 30 2d 72 38 2c 72 31 | r13!,{r0-r8,r1|
00000890 34 7d 20 20 3b 20 53 74 61 63 6b 20 72 65 67 69 |4} ; Stack regi|
000008a0 73 74 65 72 73 0a 20 20 20 20 20 20 20 20 20 20 |sters. |
000008b0 20 20 20 20 20 20 6d 6f 76 20 20 20 20 20 20 72 | mov r|
000008c0 30 2c 23 26 66 20 20 20 20 20 20 20 20 20 20 20 |0,#&f |
000008d0 20 3b 20 3d 31 35 20 46 53 43 6f 6e 74 72 6f 6c | ; =15 FSControl|
000008e0 56 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |V. |
000008f0 20 20 61 64 72 20 20 20 20 20 20 72 31 2c 66 73 | adr r1,fs|
00000900 63 6f 6e 74 72 6f 6c 76 20 20 20 20 20 3b 20 41 |controlv ; A|
00000910 64 64 72 65 73 73 20 6f 66 20 6f 75 72 20 63 6f |ddress of our co|
00000920 64 65 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 |de. |
00000930 20 20 20 6d 6f 76 20 20 20 20 20 20 72 32 2c 23 | mov r2,#|
00000940 30 20 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 |0 ; |
00000950 45 6e 74 65 72 20 77 69 74 68 20 72 31 32 20 3d |Enter with r12 =|
00000960 20 30 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 | 0. |
00000970 20 20 20 73 77 69 20 20 20 20 20 20 22 4f 53 5f | swi "OS_|
00000980 43 6c 61 69 6d 22 20 20 20 20 20 20 20 20 3b 20 |Claim" ; |
00000990 43 6c 61 69 6d 20 74 68 65 20 76 65 63 74 6f 72 |Claim the vector|
000009a0 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |. |
000009b0 20 6d 6f 76 20 20 20 20 20 20 72 30 2c 23 38 20 | mov r0,#8 |
000009c0 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 3d 38 | ; =8|
000009d0 20 46 69 6c 65 56 0a 20 20 20 20 20 20 20 20 20 | FileV. |
000009e0 20 20 20 20 20 20 20 61 64 72 20 20 20 20 20 20 | adr |
000009f0 72 31 2c 66 69 6c 65 76 20 20 20 20 20 20 20 20 |r1,filev |
00000a00 20 20 3b 20 41 64 64 72 65 73 73 20 6f 66 20 6f | ; Address of o|
00000a10 75 72 20 63 6f 64 65 0a 20 20 20 20 20 20 20 20 |ur code. |
00000a20 20 20 20 20 20 20 20 20 6d 6f 76 20 20 20 20 20 | mov |
00000a30 20 72 32 2c 23 30 20 20 20 20 20 20 20 20 20 20 | r2,#0 |
00000a40 20 20 20 3b 20 45 6e 74 65 72 20 77 69 74 68 20 | ; Enter with |
00000a50 72 31 32 20 3d 20 30 0a 20 20 20 20 20 20 20 20 |r12 = 0. |
00000a60 20 20 20 20 20 20 20 20 73 77 69 20 20 20 20 20 | swi |
00000a70 20 22 4f 53 5f 43 6c 61 69 6d 22 20 20 20 20 20 | "OS_Claim" |
00000a80 20 20 20 3b 20 43 6c 61 69 6d 20 74 68 65 20 76 | ; Claim the v|
00000a90 65 63 74 6f 72 0a 20 20 20 20 20 20 20 20 20 20 |ector. |
00000aa0 20 20 20 20 20 20 6c 64 6d 66 64 20 20 20 20 72 | ldmfd r|
00000ab0 31 33 21 2c 7b 72 30 2d 72 38 2c 70 63 7d 20 20 |13!,{r0-r8,pc} |
00000ac0 20 3b 20 52 65 2d 6c 6f 61 64 20 72 65 67 69 73 | ; Re-load regis|
00000ad0 74 65 72 73 20 61 6e 64 20 65 78 69 74 0a 0a 66 |ters and exit..f|
00000ae0 69 6e 61 6c 69 73 65 20 20 20 20 20 20 20 20 73 |inalise s|
00000af0 74 6d 66 64 20 20 20 20 72 31 33 21 2c 7b 72 30 |tmfd r13!,{r0|
00000b00 2d 72 38 2c 72 31 34 7d 20 20 3b 20 53 74 61 63 |-r8,r14} ; Stac|
00000b10 6b 20 72 65 67 69 73 74 65 72 73 0a 20 20 20 20 |k registers. |
00000b20 20 20 20 20 20 20 20 20 20 20 20 20 6d 6f 76 20 | mov |
00000b30 20 20 20 20 20 72 30 2c 23 26 66 20 20 20 20 20 | r0,#&f |
00000b40 20 20 20 20 20 20 20 3b 20 3d 31 35 20 46 53 43 | ; =15 FSC|
00000b50 6f 6e 74 72 6f 6c 56 0a 20 20 20 20 20 20 20 20 |ontrolV. |
00000b60 20 20 20 20 20 20 20 20 61 64 72 20 20 20 20 20 | adr |
00000b70 20 72 31 2c 66 73 63 6f 6e 74 72 6f 6c 76 20 20 | r1,fscontrolv |
00000b80 20 20 20 3b 20 41 64 64 72 65 73 73 20 6f 66 20 | ; Address of |
00000b90 6f 75 72 20 63 6f 64 65 0a 20 20 20 20 20 20 20 |our code. |
00000ba0 20 20 20 20 20 20 20 20 20 6d 6f 76 20 20 20 20 | mov |
00000bb0 20 20 72 32 2c 23 30 20 20 20 20 20 20 20 20 20 | r2,#0 |
00000bc0 20 20 20 20 3b 20 46 6f 72 20 63 6f 6d 70 6c 65 | ; For comple|
00000bd0 74 65 6e 65 73 73 0a 20 20 20 20 20 20 20 20 20 |teness. |
00000be0 20 20 20 20 20 20 20 73 77 69 20 20 20 20 20 20 | swi |
00000bf0 22 4f 53 5f 52 65 6c 65 61 73 65 22 20 20 20 20 |"OS_Release" |
00000c00 20 20 3b 20 52 65 6c 65 61 73 65 20 63 6c 61 69 | ; Release clai|
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00001dd0 20 20 20 20 20 20 20 20 73 74 72 62 20 20 20 20 | strb |
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00001ff0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
*
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*
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*
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*
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*
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*
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*
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00002d35 
.