view level1/cmds/list.asm @ 2017:f273e28ea8d0

Breaking kernel down into individual files... added comments
author boisy
date Tue, 07 Mar 2006 12:20:16 +0000
parents 84ea83668304
children
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********************************************************************
* List - List a text file
*
* $Id$
*
* Edt/Rev  YYYY/MM/DD  Modified by
* Comment
* ------------------------------------------------------------------
*   5      ????/??/??
* From Tandy OS-9 Level One VR 02.00.00.

         nam   List
         ttl   List a text file

* Disassembled 98/09/10 23:16:25 by Disasm v1.6 (C) 1988 by RML

         ifp1
         use   defsfile
         endc

tylg     set   Prgrm+Objct   
atrv     set   ReEnt+rev
rev      set   $00
edition  set   5

         mod   eom,name,tylg,atrv,start,size

         org   0
filepath rmb   1
parmptr  rmb   2
readbuff rmb   650
size     equ   .

name     fcs   /List/
         fcb   edition

start    stx   <parmptr		save parameter pointer
         lda   #READ.		read access mode
         os9   I$Open   	open file
         bcs   L0049		branch if error
         sta   <filepath	else save path to file
         stx   <parmptr		and updated parm pointer
L001F    lda   <filepath	get path
         leax  readbuff,u	point X to read buffer
         ldy   #200		read up to 200 bytes
         os9   I$ReadLn 	read it!
         bcs   L0035		branch if error
         lda   #1		standard output
         os9   I$WritLn 	write line to stdout
         bcc   L001F		branch if ok
         bra   L0049		else exit
L0035    cmpb  #E$EOF		did we get an EOF error?
         bne   L0049		exit if not
         lda   <filepath	else get path
         os9   I$Close  	and close it
         bcs   L0049		branch if error
         ldx   <parmptr		get param pointer
         lda   ,x		get char
         cmpa  #C$CR		end of command line?
         bne   start		branch if not
         clrb  			else clear carry
L0049    os9   F$Exit   	and exit

         emod
eom      equ   *
         end