Subversion Repositories zipcpu

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;

; Filename:     lodsto.S

;

; Project:      Zip CPU -- a small, lightweight, RISC CPU soft core

;

; Purpose:      A quick test of whether or not we can execute loads and

;               stores.  The test does not report success or failure, so

;               you will need to observe it in a simulator to know if it

;               worked or didn't.

;

; Creator:      Dan Gisselquist, Ph.D.

;               Gisselquist Tecnology, LLC

;

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;

; 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     $2,R2

        LOD     peripheral_memory_address(PC),R0

        LOD     $enable_all_interrupts_const(PC),R1

        STO     R1,(R0)

        LDI     infloop(PC),R0

infloop:

        MOV     R0,PC

        HALT                    ; We should never get here.

peripheral_memory_address

        WORD    0xc0000000

enable_all_interrupts_const

        WORD    0x8001ffff