Manual

AT75C310
126
Assembly Source Code – Boot Program
;-----------------------------------------------------------------------------
;Cadence Design Systems Ltd. Copyright 1999. All Rights Reserved.
;-----------------------------------------------------------------------------
;MODULE: bootcode.s
;CREATION DATE: 26 Feb 1999
;AUTHOR: Kevin Robertson
;DESCRIPTION:
This file contains the code to go into the SIAP bootrom - it is used by all the
bootrom tests which use a GET to include this file. If the bootrom is changed then all
the boot tests MUST be rerun to check the change.
;CHANGE HISTORY:
;26 Feb 1999
;Initial version
;3 May 1999
;Final Version - changed wait count to the required value for a 3 sec timeout and reduced Baudrate down to
;9600.
;------------------------------------------------------------------------------
; AREA bootrom, CODE, READONLY
;------------------------ List of constants and types -----------------------
ARM_MODE_SVC EQU Ox13
I_BIT EQU Ox8O
F_BIT EQU Ox4O
;- The WAIT_TIME is for a 3 second wait. The value is calculated from the cycle count of the loop
;- rx_ poll_timed of 13 and a clock period of 41.47nS. This gives the time for a count of 1 as 542nS.
;- 3 Secs/542nS = Ox54754f.
WAIT_TIME EQU OxOO54754F
RAM_BASE EQU OxFDOOOOOO
RAM_SIZE EQU 4096
RAM_LIMIT EQU RAM_BASE + RAM_SIZE
;------------------------- List of Imported resources ------------------------
;------------------------ List of Internal resources ------------------------
;-----------------------------------------------------------------------------
; Define the vector table.
; The reset vector jumps to the handler code.
; All others just dead loop on themselves!
;-----------------------------------------------------------------------------
reset
B InitReset ; reset
undefvec
B undefvec ; Undefined
swivec
B swivec ; SW IRQ
pabtvec
B pabtvec ; Program abort
dabtvec
B pabtvec ; Program abort
dabtvec
B rsvdvec ; reserved
irqvec
B irqvec ; IRQ
fiqvec