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https://opencores.org/ocsvn/zipcpu/zipcpu/trunk
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[/] [zipcpu/] [trunk/] [bench/] [asm/] [pcpc.S] - Rev 50
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;
; Filename: pcpc.S
;
; Project: Zip CPU -- a small, lightweight, RISC CPU soft core
;
; Purpose: A quick test of whether or not the busy command works.
; The test does not report success or failure, so you will need
; to observe it in a simulator to know if it worked or not.
;
; Creator: Dan Gisselquist, Ph.D.
; Gisselquist Tecnology, LLC
;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;
; Copyright (C) 2015, Gisselquist Technology, LLC
;
; This program is free software (firmware): you can redistribute it and/or
; modify it under the terms of the GNU General Public License as published
; by the Free Software Foundation, either version 3 of the License, or (at
; your option) any later version.
;
; This program is distributed in the hope that it will be useful, but WITHOUT
; ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
; for more details.
;
; License: GPL, v3, as defined and found on www.gnu.org,
; http://www.gnu.org/licenses/gpl.html
;
;
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;
start:
LDI $1,R0
MOV $1(R0),R1
MOV $2(R0),R2
MOV $3(R0),R3
MOV $4(R0),R4
MOV $5(R0),R5
MOV $6(R0),R6
MOV $7(R0),R7
MOV $8(R0),R8
MOV $9(R0),R9
MOV $10(R0),R10
MOV $11(R0),R11
MOV $12(R0),R12
MOV $13(R0),R13 ; R14 is CC, R15 is PC
LDI $0,R0
BUSY ; This should create an endless loop here
; MOV R0,R0
; MOV R0,R0
; MOV R0,R0 ; By this point, the loop should've started
LDI $10,R0 ; If we ever get here, we've got problems
ADD $1(R0),R1
ADD $2(R0),R2
ADD $3(R0),R3
MOV R0,R0
MOV R0,R0 ; If we ever get here, we've got problems
HALT
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