Misc/abrash-black-book
Watch
1
0
Fork
You've already forked abrash-black-book
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Merge pull request #21 from dennis714/master

Browse source 
minor listings formatting
This commit is contained in:
James Gregory 2017-08-05 13:16:52 +10:00 • committed by GitHub
commit fd5e7e94ff
3 changed files with 165 additions and 165 deletions
Download patch file Download diff file Expand all files Collapse all files

0
Makefile Executable file → Normal file
View file

8
src/chapter-22.md
View file

@ -87,7 +87,7 @@ Start: cld ;make STOSW count up
mov es,bx
mov cx,[bp].BufSize ;load CX with buffer size
rep stosw ;fill the buffer
Bye:mov sp,bp ;restore original stack pointer
Bye: mov sp,bp ;restore original stack pointer
pop bp ; and caller's BP
ret EndMrk-RetAddr-2 ;return, clearing the parms from the stack
ClearS endp
@ -240,7 +240,7 @@ ClearS proc near
cmp word ptr [bp].BufOfs,0
je Bye
Start: cld ;make STOSW count up
mov ah,byte ptr [bp].Attrib[1];load AH with attribute
mov ah,byte ptr [bp].Attrib[1] ;load AH with attribute
mov al,byte ptr [bp].Filler ;load AL with fill char
les di,dword ptr [bp].BufOfs ;load ES:DI with target buffer segment:offset
mov cx,[bp].BufSize ;load CX with buffer size
@ -274,7 +274,7 @@ ClearS proc near
or ax,di ;is it a null pointer?
je Bye ;yes, so we're done
Start: cld ;make STOSW count up
mov ah,byte ptr [bp].Attrib[1];load AH with attribute
mov ah,byte ptr [bp].Attrib[1] ;load AH with attribute
mov al,byte ptr [bp].Filler ;load AL with fill char
mov cx,[bp].BufSize ;load CX with buffer size
rep stosw ;fill the buffer
@ -327,7 +327,7 @@ With that problem dealt with, Listing 22.7 shows the Zenned version of
**LISTING 22.7 L22-7.ASM**
```nasm
ClearS procnear
ClearS proc near
pop dx ;get the return address
pop ax ;put fill char into AL
pop bx ;get the attribute