EightBit/Z80/test/roms/prelim.z80

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Z80 Assembly
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.title 'Preliminary Z80 tests'
; prelim.z80 - Preliminary Z80 tests
; Copyright (C) 1994 Frank D. Cringle
;
; This program is free software; 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 2
; 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
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, write to the Free Software
; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
; These tests have two goals. To start with, we assume the worst and
; successively test the instructions needed to continue testing.
; Then we try to test all instructions which cannot be handled by
; zexlax - the crc-based instruction exerciser.
; Initially errors are 'reported' by jumping to 0. This should reboot
; cp/m, so if the program terminates without any output one of the
; early tests failed. Later errors are reported by outputting an
; address via the bdos conout routine. The address can be located in
; a listing of this program.
; If the program runs to completion it displays a suitable message.
aseg
org 100h
start: ld a,1 ; test simple compares and z/nz jumps
cp 2
jp z,0
cp 1
jp nz,0
jp lab0
halt ; emergency exit
db 0ffh
lab0: call lab2 ; does a simple call work?
lab1: jp 0 ; fail
lab2: pop hl ; check return address
ld a,h
cp high lab1
jp z,lab3
jp 0
lab3: ld a,l
cp low lab1
jp z,lab4
jp 0
; test presence and uniqueness of all machine registers
; (except ir)
lab4: ld sp,regs1
pop af
pop bc
pop de
pop hl
ex af,af'
exx
pop af
pop bc
pop de
pop hl
pop ix
pop iy
ld sp,regs2+20
push iy
push ix
push hl
push de
push bc
push af
ex af,af'
exx
push hl
push de
push bc
push af
v: set 0
rept 20
ld a,(regs2+v/2)
v: set v+2
cp v
jp nz,0
endm
; test access to memory via (hl)
ld hl,hlval
ld a,(hl)
cp 0a5h
jp nz,0
ld hl,hlval+1
ld a,(hl)
cp 03ch
jp nz,0
; test unconditional return
ld sp,stack
ld hl,reta
push hl
ret
jp 0
; test instructions needed for hex output
reta: ld a,255
and a,15
cp 15
jp nz,0
ld a,05ah
and 15
cp 00ah
jp nz,0
rrca
cp 005h
jp nz,0
rrca
cp 082h
jp nz,0
rrca
cp 041h
jp nz,0
rrca
cp 0a0h
jp nz,0
ld hl,01234h
push hl
pop bc
ld a,b
cp 012h
jp nz,0
ld a,c
cp 034h
jp nz,0
; from now on we can report errors by displaying an address
; test conditional call, ret, jp, jr
tcond: macro flag,pcond,ncond,rel
ld hl,&flag
push hl
pop af
call &pcond,lab1&pcond
jp error
lab1&pcond: pop hl
ld hl,0d7h xor &flag
push hl
pop af
call &ncond,lab2&pcond
jp error
lab2&pcond: pop hl
ld hl,lab3&pcond
push hl
ld hl,&flag
push hl
pop af
ret &pcond
call error
lab3&pcond: ld hl,lab4&pcond
push hl
ld hl,0d7h xor &flag
push hl
pop af
ret &ncond
call error
lab4&pcond: ld hl,&flag
push hl
pop af
jp &pcond,lab5&pcond
call error
lab5&pcond: ld hl,0d7h xor &flag
push hl
pop af
jp &ncond,lab6&pcond
call error
lab6&pcond:
if &rel
ld hl,&flag
push hl
pop af
jr &pcond,lab7&pcond
call error
lab7&pcond: ld hl,0d7h xor &flag
push hl
pop af
jr &ncond,lab8&pcond
call error
lab8&pcond:
endif
endm
tcond 1,c,nc,1
tcond 4,pe,po,0
tcond 040h,z,nz,1
tcond 080h,m,p,0
; test indirect jumps
ld hl,lab5
jp (hl)
call error
lab5: ld hl,lab6
push hl
pop ix
jp (ix)
call error
lab6: ld hl,lab7
push hl
pop iy
jp (iy)
call error
; djnz (and (partially) inc a, inc hl)
lab7: ld a,0a5h
ld b,4
lab8: rrca
djnz lab8
cp 05ah
call nz,error
ld b,16
lab9: inc a
djnz lab9
cp 06ah
call nz,error
ld b,0
ld hl,0
lab10: inc hl
djnz lab10
ld a,h
cp 1
call nz,error
ld a,l
cp 0
call nz,error
; relative addressing
reladr: macro r
ld &r,hlval
ld a,(&r)
cp 0a5h
call nz,error
ld a,(&r+1)
cp 03ch
call nz,error
inc &r
ld a,(&r-1)
cp 0a5h
call nz,error
ld &r,hlval-126
ld a,(&r+127)
cp 03ch
call nz,error
ld &r,hlval+128
ld a,(&r-128)
cp 0a5h
call nz,error
endm
reladr ix
reladr iy
allok: ld de,okmsg
ld c,9
call 5
jp 0
okmsg: db 'Preliminary tests complete$'
; display address at top of stack and exit
error: pop bc
ld h,high hextab
ld a,b
rrca
rrca
rrca
rrca
and 15
ld l,a
ld a,(hl)
call conout
ld a,b
and 15
ld l,a
ld a,(hl)
call conout
ld a,c
rrca
rrca
rrca
rrca
and 15
ld l,a
ld a,(hl)
call conout
ld a,c
and 15
ld l,a
ld a,(hl)
call conout
ld a,13
call conout
ld a,10
call conout
jp 0
conout: push af
push bc
push de
push hl
ld c,2
ld e,a
call 5
pop hl
pop de
pop bc
pop af
ret
v: set 0
regs1: rept 20
v: set v+2
db v
endm
regs2: ds 20,0
hlval: db 0a5h,03ch
; skip to next page boundary
org (($+255)/256)*256
hextab: db '0123456789abcdef'
ds 240
stack: equ $
end