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Correct typos and formatting in listing 3.6

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rnndxb wxcy 2016-03-03 13:56:41 -05:00
commit 879524acd5
1 changed files with 17 additions and 17 deletions
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src/chapter-03.md
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@ -1932,25 +1932,25 @@ timing.
; ;
; By Michael Abrash ; By Michael Abrash
; ;
mystack segment para stack ‘STACK' mystack segment para stack 'STACK'
db 512 dup(?) db 512 dup(?)
mystack ends mystack ends
; ;
Code segment para public ‘CODE' Code segment para public 'CODE'
assume cs:Code, ds:Code assume cs:Code, ds:Code
extrn ZTimerOn:near, ZTimerOff:near, ZTimerReport:near extrn ZTimerOn:near, ZTimerOff:near, ZTimerReport:near
Startproc near Start proc near
push cs push cs
pop ds ;point DS to the code segment, pop ds ;point DS to the code segment,
; so data as well as code can easily ; so data as well as code can easily
; be included in TESTCODE ; be included in TESTCODE
; ;
; Delay for 6-7 seconds, to let the Enter keystroke that started the ; Delay for 6-7 seconds, to let the Enter keystroke that started the
; program come back up. ; program come back up.
; ;
mov ah,2ch mov ah,2ch
int 21h ;get the current time int 21h ;get the current time
mov bh,dh ;set the current time aside mov bh,dh ;set the current time aside
DelayLoop: DelayLoop:
mov ah,2ch mov ah,2ch
push bx ;preserve start time push bx ;preserve start time
@ -1962,12 +1962,12 @@ DelayLoop:
add dh,60 ;yes, a minute must have turned over, add dh,60 ;yes, a minute must have turned over,
; so add one minute ; so add one minute
CheckDelayTime: CheckDelayTime:
sub dh,bh ;get time that's passed sub dh,bh ;get time that's passed
cmp dh,7 ;has it been more than 6 seconds yet? cmp dh,7 ;has it been more than 6 seconds yet?
jb DelayLoop ;not yet jb DelayLoop ;not yet
; ;
include TESTCODE ;code to be measured, including calls include TESTCODE ;code to be measured, including calls
; to ZTimerOn and ZTimerOff ; to ZTimerOn and ZTimerOff
; ;
; Display the results. ; Display the results.
; ;
@ -1975,8 +1975,8 @@ CheckDelayTime:
; ;
; Terminate the program. ; Terminate the program.
; ;
mov ah,4ch mov ah,4ch
int 21h int 21h
Start endp Start endp
Code ends Code ends
end Start end Start