OpenCores
URL https://opencores.org/ocsvn/t48/t48/trunk

Subversion Repositories t48

[/] [t48/] [tags/] [rel_0_6__beta/] [sw/] [verif/] [white_box/] [psen_rd_wr_timing/] [test.asm] - Blame information for rev 292

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 130 arniml 
        ;; *******************************************************************
2 131 arniml 
        ;; $Id: test.asm,v 1.2 2004-09-12 00:28:58 arniml Exp $
3 130 arniml 
        ;;
4 
        ;; Test overlap of PSEN and RD/WR.
5 
        ;; *******************************************************************
6 
 
7 
        INCLUDE "cpu.inc"
8 
        INCLUDE "pass_fail.inc"
9 
 
10 
        ORG     0
11 
 
12 
        ;; Start of test
13 
 
14 
        ;; access external memory
15 131 arniml 
        mov     r0, #0FFH
16 
        mov     a, #001H
17 
        movx    @r0, a
18 130 arniml 
 
19 
        ;; jump to external Program Memory
20 
        jmp     extern_rom
21 
 
22 
pass:   PASS
23 
 
24 
fail:   FAIL
25 
 
26 
 
27 
        ORG     0800H
28 
extern_rom:
29 
        ;; write to external memory
30 
        mov     r0, #010H
31 
        mov     a, #0A5H
32 
        movx    @r0, a
33 
        cpl     a
34 
        mov     r1, a
35 
        inc     r0
36 
        movx    @r0, a
37 
 
38 
        ;; read back data
39 
        movx    a, @r0
40 
        cpl     a
41 
        add     a, r1
42 
        cpl     a
43 
        jz      read_next
44 
        jmp     fail
45 
 
46 
read_next:
47 
        mov     a, r1
48 
        cpl     a
49 
        mov     r1, a
50 
        dec     r0
51 
        movx    a, @r0
52 
        cpl     a
53 
        add     a, r1
54 
        cpl     a
55 
        jz      read_ok
56 
        jmp     fail
57 
 
58 
read_ok:
59 
        jmp     pass

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.