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Code Issues Releases Wiki Activity

- fixed some typos by diff with Hellwig's remaining pages.

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tim.newsham
2008-05-03 05:54:44 +00:00
parent 77d62c2162
commit 797cf4aa19
4 changed files with 11 additions and 11 deletions
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6
pages/e01-07
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@@ -17,11 +17,11 @@ sysopen:
jsr r0,arg2 / get sys args into u.namep and on stack
jsr r0,namei / i-number of file in r1
br error2 / file not found
tst (sp) / is mode = 0 (2nd arg of call, 0 means, open for read)
tst (sp) / is mode = 0 (2nd arg of call; 0 means, open for read)
beq 1f / yes, leave i-number positive
neg r1 / open for writing so make i-number negative
1:
jsr r0,iopen / ooen file whose i-number is in r1
jsr r0,iopen / open file whose i-number is in r1
tst (sp)+ / pop the stack and test the mode
beq op1 / is open for read op1
@@ -44,7 +44,7 @@ op1:
cmp r3,$[nfiles*8.] / done scanning
blt 1b / no, back
br error2 / yes, error
1: / r2 has index to u.fp list, r3, has index to fsp table
1: / r2 has index to u.fp list; r3, has index to fsp table
mov r1,fsp(r3) / put i-number of open file into next available
mov cdev,fsp+2(r3) / entry in fsp table, put # of device in
/ next word

10
pages/e01-08
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@@ -8,7 +8,7 @@ error2:
sysret2:
jmp sysret / see 'sysret' routine
syscreat: / name, mode
syscreat: / name; mode
jsr r0,arg2 / put file name in u.namep put mode on stack
jsr r0,namei / get the i-number
br 2f / if file doesn't exist 2f
@@ -24,7 +24,7 @@ syscreat: / name, mode
mov u.dirbuf,r1 / put i-number for this new file in r1
br op0 / open the file
sysmkdir: / make a directopy
sysmkdir: / make a directory
jsr r0,arg2 / point u.namep to the file name
jsr r0,namei / get the i-number
br .+4 / if file not found branch around error
@@ -38,7 +38,7 @@ sysmkdir: / make a directopy
br sysret2 /
sysclose: / close the file
mov *u.r0,r1 / move index to u.fu list into r1
mov *u.r0,r1 / move index to u.fp list into r1
jsr r0,fclose / close the file
br error2 / unknown file descriptor
br sysret2
@@ -46,8 +46,8 @@ sysclose: / close the file
sysemt:
jsr r0,arg; 30 / put the argument of the sysemt call in loc 30
cmp 30,$core / was the argument a lower address than core
blo 1f / yes, rtssvm
cmp 30,$ecore / no, was it higher than core and less than
blo 1f / yes, rtssym
cmp 30,$ecore / no, was it higher than "core" and less than
/ "ecore"
blo 2f / yes, sysret2
1:

4
pages/e01-09
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@@ -26,7 +26,7 @@ sysmdate: / change the modification time of a file
mov 2(sp),i.mtim+2 / modification time
br sysret2
sysstty: / set mode of typewriter, 3 consequtive word arguments
sysstty: / set mode of typewriter; 3 consequtive word arguments
jsr r0,gtty / r1 will have offset to tty block, r2 has source
mov r2,-(sp)
mov r1,-(sp) / put r1 and r2 on the stack
@@ -43,7 +43,7 @@ sysstty: / set mode of typewriter, 3 consequtive word arguments
beq 1f / yes, no characters to output
mov r1,0f / no, put offset in sleep arg
jsr r0,sleep; 0:.. / put tty output process to sleep
br 1b / trv to calm it down again
br 1b / try to calm it down again
1:
mov (sp)+,r1
mov (sp)+,r2 / restore registers

2
pages/e01-10
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@@ -4,7 +4,7 @@
mov (r2)+,tty+4(r1) / move to flag byte of tty block
jmp sysret2 / return to user
sysgtty: / get status of typewriter, 3 consequtive word arguments
sysgtty: / get status of typewriter; 3 consequtive word arguments
jsr r0,gtty / r1 will have offset to tty block, r2 has
/ destination
mov rcsr(r1),(r2)+ / put reader control status in 1st word