head	1.3;
access;
symbols
	arelease:1.1.1.1
	avendor:1.1.1;
locks; strict;
comment	@;; @;


1.3
date	2007.11.29.03.50.27;	author mcupro;	state Exp;
branches;
next	1.2;
commitid	35ad474e33b34567;

1.2
date	2007.11.26.13.44.50;	author mcupro;	state Exp;
branches;
next	1.1;
commitid	7a35474acdcf4567;

1.1
date	2007.10.13.08.41.56;	author mcupro;	state Exp;
branches
	1.1.1.1;
next	;
commitid	710f4710817c4567;

1.1.1.1
date	2007.10.13.08.41.56;	author mcupro;	state Exp;
branches;
next	;
commitid	710f4710817c4567;


desc
@@


1.3
log
@no message
@
text
@##################################################################
# TITLE: Boot Up Code
# AUTHOR: Steve Rhoads (rhoadss@@yahoo.com)
# DATE CREATED: 1/12/02
# FILENAME: boot.asm
# PROJECT: Plasma CPU core
# COPYRIGHT: Software placed into the public domain by the author.
#    Software 'as is' without warranty.  Author liable for nothing.
# DESCRIPTION:
#    Initializes the stack pointer and jumps to main2().
##################################################################
	.text
	.align	2
	.globl	entry
	.ent	entry
entry:
   .set noreorder

   #These eight instructions must be the first instructions.
   #convert.exe will correctly initialize $gp
   lui   $gp,0
   ori   $gp,$gp,0
   #convert.exe will set $4=.sbss_start $5=.bss_end
   lui   $4,0
   ori   $4,$4,0
   lui   $5,0
   ori   $5,$5,0
   lui   $sp,0
   ori   $sp,$sp,0xfff0     #initialize stack pointer
$BSS_CLEAR:
   sw    $0,0($4)
   slt   $3,$4,$5
   bnez  $3,$BSS_CLEAR
   addiu $4,$4,4
nop
nop
   jal   main2
   nop
$L1:
		nop
   j $L1
		nop
		nop
		nop
		nop
# som NOP make sure the results had write back
   .set reorder
	.end	entry



###################################################
   #address 0x44
   .global interrupt_service_routine
   .ent interrupt_service_routine
interrupt_service_routine:
   .set noreorder
   .set noat
	nop  
#do not save registers for this is just for simulation in this version
  jal   ISR
	nop
   mtc0  $0,$0  #return from interrupt
	nop
nop
   .end interrupt_service_routine
   .set at
###################################################@


1.2
log
@no message
@
text
@d59 2
a60 1
	nop  #do not save registers for this is just fpr simulation
@


1.1
log
@Initial revision
@
text
@d35 2
a36 1

d40 1
d42 5
a46 1

d49 19
@


1.1.1.1
log
@no message
@
text
@@