6502_65C02_functional_tests/6502_functional_test.a65

6109 lines
145 KiB
Plaintext

;
; 6 5 0 2 F U N C T I O N A L T E S T
;
; Copyright (C) 2012-2020 Klaus Dormann
;
; 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 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
; 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, see <http://www.gnu.org/licenses/>.
; This program is designed to test all opcodes of a 6502 emulator using all
; addressing modes with focus on propper setting of the processor status
; register bits.
;
; version 05-jan-2020
; contact info at http://2m5.de or email K@2m5.de
;
; assembled with AS65 written by Frank A. Kingswood
; The assembler as65_142.zip can be obtained from my GitHub repository
; command line switches: -l -m -s2 -w -h0
; | | | | no page headers in listing
; | | | wide listing (133 char/col)
; | | write intel hex file instead of binary
; | expand macros in listing
; generate pass2 listing
;
; No IO - should be run from a monitor with access to registers.
; To run load intel hex image with a load command, than alter PC to 400 hex
; (code_segment) and enter a go command.
; Loop on program counter determines error or successful completion of test.
; Check listing for relevant traps (jump/branch *).
; Please note that in early tests some instructions will have to be used before
; they are actually tested!
;
; RESET, NMI or IRQ should not occur and will be trapped if vectors are enabled.
; Tests documented behavior of the original NMOS 6502 only! No unofficial
; opcodes. Additional opcodes of newer versions of the CPU (65C02, 65816) will
; not be tested. Decimal ops will only be tested with valid BCD operands and
; N V Z flags will be ignored.
;
; Debugging hints:
; Most of the code is written sequentially. if you hit a trap, check the
; immediately preceeding code for the instruction to be tested. Results are
; tested first, flags are checked second by pushing them onto the stack and
; pulling them to the accumulator after the result was checked. The "real"
; flags are no longer valid for the tested instruction at this time!
; If the tested instruction was indexed, the relevant index (X or Y) must
; also be checked. Opposed to the flags, X and Y registers are still valid.
;
; versions:
; 28-jul-2012 1st version distributed for testing
; 29-jul-2012 fixed references to location 0, now #0
; added license - GPLv3
; 30-jul-2012 added configuration options
; 01-aug-2012 added trap macro to allow user to change error handling
; 01-dec-2012 fixed trap in branch field must be a branch
; 02-mar-2013 fixed PLA flags not tested
; 19-jul-2013 allowed ROM vectors to be loaded when load_data_direct = 0
; added test sequence check to detect if tests jump their fence
; 23-jul-2013 added RAM integrity check option
; 16-aug-2013 added error report to standard output option
; 13-dec-2014 added binary/decimal opcode table switch test
; 14-dec-2014 improved relative address test
; 23-aug-2015 added option to disable self modifying tests
; 24-aug-2015 all self modifying immediate opcodes now execute in data RAM
; added small branch offset pretest
; 21-oct-2015 added option to disable decimal mode ADC & SBC tests
; 04-dec-2017 fixed BRK only tested with interrupts enabled
; added option to skip the remainder of a failing test
; in report.i65
; 05-jan-2020 fixed shifts not testing zero result and flag when last 1-bit
; is shifted out
; C O N F I G U R A T I O N
;ROM_vectors writable (0=no, 1=yes)
;if ROM vectors can not be used interrupts will not be trapped
;as a consequence BRK can not be tested but will be emulated to test RTI
ROM_vectors = 1
;load_data_direct (0=move from code segment, 1=load directly)
;loading directly is preferred but may not be supported by your platform
;0 produces only consecutive object code, 1 is not suitable for a binary image
load_data_direct = 1
;I_flag behavior (0=force enabled, 1=force disabled, 2=prohibit change, 3=allow
;change) 2 requires extra code and is not recommended. SEI & CLI can only be
;tested if you allow changing the interrupt status (I_flag = 3)
I_flag = 3
;configure memory - try to stay away from memory used by the system
;zero_page memory start address, $52 (82) consecutive Bytes required
; add 2 if I_flag = 2
zero_page = $a
;data_segment memory start address, $7B (123) consecutive Bytes required
data_segment = $200
if (data_segment & $ff) != 0
ERROR ERROR ERROR low byte of data_segment MUST be $00 !!
endif
;code_segment memory start address, 13.1kB of consecutive space required
; add 2.5 kB if I_flag = 2
code_segment = $400
;self modifying code may be disabled to allow running in ROM
;0=part of the code is self modifying and must reside in RAM
;1=tests disabled: branch range
disable_selfmod = 0
;report errors through I/O channel (0=use standard self trap loops, 1=include
;report.i65 as I/O channel, add 3.5 kB)
report = 0
;RAM integrity test option. Checks for undesired RAM writes.
;set lowest non RAM or RAM mirror address page (-1=disable, 0=64k, $40=16k)
;leave disabled if a monitor, OS or background interrupt is allowed to alter RAM
ram_top = -1
;disable test decimal mode ADC & SBC, 0=enable, 1=disable,
;2=disable including decimal flag in processor status
disable_decimal = 0
noopt ;do not take shortcuts
;macros for error & success traps to allow user modification
;example:
;trap macro
; jsr my_error_handler
; endm
;trap_eq macro
; bne skip\?
; trap ;failed equal (zero)
;skip\?
; endm
;
; my_error_handler should pop the calling address from the stack and report it.
; putting larger portions of code (more than 3 bytes) inside the trap macro
; may lead to branch range problems for some tests.
if report = 0
trap macro
jmp * ;failed anyway
endm
trap_eq macro
beq * ;failed equal (zero)
endm
trap_ne macro
bne * ;failed not equal (non zero)
endm
trap_cs macro
bcs * ;failed carry set
endm
trap_cc macro
bcc * ;failed carry clear
endm
trap_mi macro
bmi * ;failed minus (bit 7 set)
endm
trap_pl macro
bpl * ;failed plus (bit 7 clear)
endm
trap_vs macro
bvs * ;failed overflow set
endm
trap_vc macro
bvc * ;failed overflow clear
endm
; please observe that during the test the stack gets invalidated
; therefore a RTS inside the success macro is not possible
success macro
jmp * ;test passed, no errors
endm
endif
if report = 1
trap macro
jsr report_error
endm
trap_eq macro
bne skip\?
trap ;failed equal (zero)
skip\?
endm
trap_ne macro
beq skip\?
trap ;failed not equal (non zero)
skip\?
endm
trap_cs macro
bcc skip\?
trap ;failed carry set
skip\?
endm
trap_cc macro
bcs skip\?
trap ;failed carry clear
skip\?
endm
trap_mi macro
bpl skip\?
trap ;failed minus (bit 7 set)
skip\?
endm
trap_pl macro
bmi skip\?
trap ;failed plus (bit 7 clear)
skip\?
endm
trap_vs macro
bvc skip\?
trap ;failed overflow set
skip\?
endm
trap_vc macro
bvs skip\?
trap ;failed overflow clear
skip\?
endm
; please observe that during the test the stack gets invalidated
; therefore a RTS inside the success macro is not possible
success macro
jsr report_success
endm
endif
carry equ %00000001 ;flag bits in status
zero equ %00000010
intdis equ %00000100
decmode equ %00001000
break equ %00010000
reserv equ %00100000
overfl equ %01000000
minus equ %10000000
fc equ carry
fz equ zero
fzc equ carry+zero
fv equ overfl
fvz equ overfl+zero
fn equ minus
fnc equ minus+carry
fnz equ minus+zero
fnzc equ minus+zero+carry
fnv equ minus+overfl
fao equ break+reserv ;bits always on after PHP, BRK
fai equ fao+intdis ;+ forced interrupt disable
faod equ fao+decmode ;+ ignore decimal
faid equ fai+decmode ;+ ignore decimal
m8 equ $ff ;8 bit mask
m8i equ $ff&~intdis ;8 bit mask - interrupt disable
;macros to allow masking of status bits.
;masking test of decimal bit
;masking of interrupt enable/disable on load and compare
;masking of always on bits after PHP or BRK (unused & break) on compare
if disable_decimal < 2
if I_flag = 0
load_flag macro
lda #\1&m8i ;force enable interrupts (mask I)
endm
cmp_flag macro
cmp #(\1|fao)&m8i ;I_flag is always enabled + always on bits
endm
eor_flag macro
eor #(\1&m8i|fao) ;mask I, invert expected flags + always on bits
endm
endif
if I_flag = 1
load_flag macro
lda #\1|intdis ;force disable interrupts
endm
cmp_flag macro
cmp #(\1|fai)&m8 ;I_flag is always disabled + always on bits
endm
eor_flag macro
eor #(\1|fai) ;invert expected flags + always on bits + I
endm
endif
if I_flag = 2
load_flag macro
lda #\1
ora flag_I_on ;restore I-flag
and flag_I_off
endm
cmp_flag macro
eor flag_I_on ;I_flag is never changed
cmp #(\1|fao)&m8i ;expected flags + always on bits, mask I
endm
eor_flag macro
eor flag_I_on ;I_flag is never changed
eor #(\1&m8i|fao) ;mask I, invert expected flags + always on bits
endm
endif
if I_flag = 3
load_flag macro
lda #\1 ;allow test to change I-flag (no mask)
endm
cmp_flag macro
cmp #(\1|fao)&m8 ;expected flags + always on bits
endm
eor_flag macro
eor #\1|fao ;invert expected flags + always on bits
endm
endif
else
if I_flag = 0
load_flag macro
lda #\1&m8i ;force enable interrupts (mask I)
endm
cmp_flag macro
ora #decmode ;ignore decimal mode bit
cmp #(\1|faod)&m8i ;I_flag is always enabled + always on bits
endm
eor_flag macro
ora #decmode ;ignore decimal mode bit
eor #(\1&m8i|faod) ;mask I, invert expected flags + always on bits
endm
endif
if I_flag = 1
load_flag macro
lda #\1|intdis ;force disable interrupts
endm
cmp_flag macro
ora #decmode ;ignore decimal mode bit
cmp #(\1|faid)&m8 ;I_flag is always disabled + always on bits
endm
eor_flag macro
ora #decmode ;ignore decimal mode bit
eor #(\1|faid) ;invert expected flags + always on bits + I
endm
endif
if I_flag = 2
load_flag macro
lda #\1
ora flag_I_on ;restore I-flag
and flag_I_off
endm
cmp_flag macro
eor flag_I_on ;I_flag is never changed
ora #decmode ;ignore decimal mode bit
cmp #(\1|faod)&m8i ;expected flags + always on bits, mask I
endm
eor_flag macro
eor flag_I_on ;I_flag is never changed
ora #decmode ;ignore decimal mode bit
eor #(\1&m8i|faod) ;mask I, invert expected flags + always on bits
endm
endif
if I_flag = 3
load_flag macro
lda #\1 ;allow test to change I-flag (no mask)
endm
cmp_flag macro
ora #decmode ;ignore decimal mode bit
cmp #(\1|faod)&m8 ;expected flags + always on bits
endm
eor_flag macro
ora #decmode ;ignore decimal mode bit
eor #\1|faod ;invert expected flags + always on bits
endm
endif
endif
;macros to set (register|memory|zeropage) & status
set_stat macro ;setting flags in the processor status register
load_flag \1
pha ;use stack to load status
plp
endm
set_a macro ;precharging accu & status
load_flag \2
pha ;use stack to load status
lda #\1 ;precharge accu
plp
endm
set_x macro ;precharging index & status
load_flag \2
pha ;use stack to load status
ldx #\1 ;precharge index x
plp
endm
set_y macro ;precharging index & status
load_flag \2
pha ;use stack to load status
ldy #\1 ;precharge index y
plp
endm
set_ax macro ;precharging indexed accu & immediate status
load_flag \2
pha ;use stack to load status
lda \1,x ;precharge accu
plp
endm
set_ay macro ;precharging indexed accu & immediate status
load_flag \2
pha ;use stack to load status
lda \1,y ;precharge accu
plp
endm
set_z macro ;precharging indexed zp & immediate status
load_flag \2
pha ;use stack to load status
lda \1,x ;load to zeropage
sta zpt
plp
endm
set_zx macro ;precharging zp,x & immediate status
load_flag \2
pha ;use stack to load status
lda \1,x ;load to indexed zeropage
sta zpt,x
plp
endm
set_abs macro ;precharging indexed memory & immediate status
load_flag \2
pha ;use stack to load status
lda \1,x ;load to memory
sta abst
plp
endm
set_absx macro ;precharging abs,x & immediate status
load_flag \2
pha ;use stack to load status
lda \1,x ;load to indexed memory
sta abst,x
plp
endm
;macros to test (register|memory|zeropage) & status & (mask)
tst_stat macro ;testing flags in the processor status register
php ;save status
pla ;use stack to retrieve status
pha
cmp_flag \1
trap_ne
plp ;restore status
endm
tst_a macro ;testing result in accu & flags
php ;save flags
cmp #\1 ;test result
trap_ne
pla ;load status
pha
cmp_flag \2
trap_ne
plp ;restore status
endm
tst_x macro ;testing result in x index & flags
php ;save flags
cpx #\1 ;test result
trap_ne
pla ;load status
pha
cmp_flag \2
trap_ne
plp ;restore status
endm
tst_y macro ;testing result in y index & flags
php ;save flags
cpy #\1 ;test result
trap_ne
pla ;load status
pha
cmp_flag \2
trap_ne
plp ;restore status
endm
tst_ax macro ;indexed testing result in accu & flags
php ;save flags
cmp \1,x ;test result
trap_ne
pla ;load status
eor_flag \3
cmp \2,x ;test flags
trap_ne ;
endm
tst_ay macro ;indexed testing result in accu & flags
php ;save flags
cmp \1,y ;test result
trap_ne ;
pla ;load status
eor_flag \3
cmp \2,y ;test flags
trap_ne
endm
tst_z macro ;indexed testing result in zp & flags
php ;save flags
lda zpt
cmp \1,x ;test result
trap_ne
pla ;load status
eor_flag \3
cmp \2,x ;test flags
trap_ne
endm
tst_zx macro ;testing result in zp,x & flags
php ;save flags
lda zpt,x
cmp \1,x ;test result
trap_ne
pla ;load status
eor_flag \3
cmp \2,x ;test flags
trap_ne
endm
tst_abs macro ;indexed testing result in memory & flags
php ;save flags
lda abst
cmp \1,x ;test result
trap_ne
pla ;load status
eor_flag \3
cmp \2,x ;test flags
trap_ne
endm
tst_absx macro ;testing result in abs,x & flags
php ;save flags
lda abst,x
cmp \1,x ;test result
trap_ne
pla ;load status
eor_flag \3
cmp \2,x ;test flags
trap_ne
endm
; RAM integrity test
; verifies that none of the previous tests has altered RAM outside of the
; designated write areas.
; uses zpt word as indirect pointer, zpt+2 word as checksum
if ram_top > -1
check_ram macro
cld
lda #0
sta zpt ;set low byte of indirect pointer
sta zpt+3 ;checksum high byte
if disable_selfmod = 0
sta range_adr ;reset self modifying code
endif
clc
ldx #zp_bss-zero_page ;zeropage - write test area
ccs3\? adc zero_page,x
bcc ccs2\?
inc zpt+3 ;carry to high byte
clc
ccs2\? inx
bne ccs3\?
ldx #hi(abs1) ;set high byte of indirect pointer
stx zpt+1
ldy #lo(abs1) ;data after write & execute test area
ccs5\? adc (zpt),y
bcc ccs4\?
inc zpt+3 ;carry to high byte
clc
ccs4\? iny
bne ccs5\?
inx ;advance RAM high address
stx zpt+1
cpx #ram_top
bne ccs5\?
sta zpt+2 ;checksum low is
cmp ram_chksm ;checksum low expected
trap_ne ;checksum mismatch
lda zpt+3 ;checksum high is
cmp ram_chksm+1 ;checksum high expected
trap_ne ;checksum mismatch
endm
else
check_ram macro
;RAM check disabled - RAM size not set
endm
endif
next_test macro ;make sure, tests don't jump the fence
lda test_case ;previous test
cmp #test_num
trap_ne ;test is out of sequence
test_num = test_num + 1
lda #test_num ;*** next tests' number
sta test_case
;check_ram ;uncomment to find altered RAM after each test
endm
if load_data_direct = 1
data
else
bss ;uninitialized segment, copy of data at end of code!
endif
org zero_page
;break test interrupt save
irq_a ds 1 ;a register
irq_x ds 1 ;x register
if I_flag = 2
;masking for I bit in status
flag_I_on ds 1 ;or mask to load flags
flag_I_off ds 1 ;and mask to load flags
endif
zpt ;6 bytes store/modify test area
;add/subtract operand generation and result/flag prediction
adfc ds 1 ;carry flag before op
ad1 ds 1 ;operand 1 - accumulator
ad2 ds 1 ;operand 2 - memory / immediate
adrl ds 1 ;expected result bits 0-7
adrh ds 1 ;expected result bit 8 (carry)
adrf ds 1 ;expected flags NV0000ZC (only binary mode)
sb2 ds 1 ;operand 2 complemented for subtract
zp_bss
zps db $80,1 ;additional shift pattern to test zero result & flag
zp1 db $c3,$82,$41,0 ;test patterns for LDx BIT ROL ROR ASL LSR
zp7f db $7f ;test pattern for compare
;logical zeropage operands
zpOR db 0,$1f,$71,$80 ;test pattern for OR
zpAN db $0f,$ff,$7f,$80 ;test pattern for AND
zpEO db $ff,$0f,$8f,$8f ;test pattern for EOR
;indirect addressing pointers
ind1 dw abs1 ;indirect pointer to pattern in absolute memory
dw abs1+1
dw abs1+2
dw abs1+3
dw abs7f
inw1 dw abs1-$f8 ;indirect pointer for wrap-test pattern
indt dw abst ;indirect pointer to store area in absolute memory
dw abst+1
dw abst+2
dw abst+3
inwt dw abst-$f8 ;indirect pointer for wrap-test store
indAN dw absAN ;indirect pointer to AND pattern in absolute memory
dw absAN+1
dw absAN+2
dw absAN+3
indEO dw absEO ;indirect pointer to EOR pattern in absolute memory
dw absEO+1
dw absEO+2
dw absEO+3
indOR dw absOR ;indirect pointer to OR pattern in absolute memory
dw absOR+1
dw absOR+2
dw absOR+3
;add/subtract indirect pointers
adi2 dw ada2 ;indirect pointer to operand 2 in absolute memory
sbi2 dw sba2 ;indirect pointer to complemented operand 2 (SBC)
adiy2 dw ada2-$ff ;with offset for indirect indexed
sbiy2 dw sba2-$ff
zp_bss_end
org data_segment
test_case ds 1 ;current test number
ram_chksm ds 2 ;checksum for RAM integrity test
;add/subtract operand copy - abs tests write area
abst ;6 bytes store/modify test area
ada2 ds 1 ;operand 2
sba2 ds 1 ;operand 2 complemented for subtract
ds 4 ;fill remaining bytes
data_bss
if load_data_direct = 1
ex_andi and #0 ;execute immediate opcodes
rts
ex_eori eor #0 ;execute immediate opcodes
rts
ex_orai ora #0 ;execute immediate opcodes
rts
ex_adci adc #0 ;execute immediate opcodes
rts
ex_sbci sbc #0 ;execute immediate opcodes
rts
else
ex_andi ds 3
ex_eori ds 3
ex_orai ds 3
ex_adci ds 3
ex_sbci ds 3
endif
;zps db $80,1 ;additional shift patterns test zero result & flag
abs1 db $c3,$82,$41,0 ;test patterns for LDx BIT ROL ROR ASL LSR
abs7f db $7f ;test pattern for compare
;loads
fLDx db fn,fn,0,fz ;expected flags for load
;shifts
rASL ;expected result ASL & ROL -carry
rROL db 0,2,$86,$04,$82,0
rROLc db 1,3,$87,$05,$83,1 ;expected result ROL +carry
rLSR ;expected result LSR & ROR -carry
rROR db $40,0,$61,$41,$20,0
rRORc db $c0,$80,$e1,$c1,$a0,$80 ;expected result ROR +carry
fASL ;expected flags for shifts
fROL db fzc,0,fnc,fc,fn,fz ;no carry in
fROLc db fc,0,fnc,fc,fn,0 ;carry in
fLSR
fROR db 0,fzc,fc,0,fc,fz ;no carry in
fRORc db fn,fnc,fnc,fn,fnc,fn ;carry in
;increments (decrements)
rINC db $7f,$80,$ff,0,1 ;expected result for INC/DEC
fINC db 0,fn,fn,fz,0 ;expected flags for INC/DEC
;logical memory operand
absOR db 0,$1f,$71,$80 ;test pattern for OR
absAN db $0f,$ff,$7f,$80 ;test pattern for AND
absEO db $ff,$0f,$8f,$8f ;test pattern for EOR
;logical accu operand
absORa db 0,$f1,$1f,0 ;test pattern for OR
absANa db $f0,$ff,$ff,$ff ;test pattern for AND
absEOa db $ff,$f0,$f0,$0f ;test pattern for EOR
;logical results
absrlo db 0,$ff,$7f,$80
absflo db fz,fn,0,fn
data_bss_end
code
org code_segment
start cld
ldx #$ff
txs
lda #0 ;*** test 0 = initialize
sta test_case
test_num = 0
;stop interrupts before initializing BSS
if I_flag = 1
sei
endif
;initialize I/O for report channel
if report = 1
jsr report_init
endif
;pretest small branch offset
ldx #5
jmp psb_test
psb_bwok
ldy #5
bne psb_forw
trap ;branch should be taken
dey ;forward landing zone
dey
dey
dey
dey
psb_forw
dey
dey
dey
dey
dey
beq psb_fwok
trap ;forward offset
dex ;backward landing zone
dex
dex
dex
dex
psb_back
dex
dex
dex
dex
dex
beq psb_bwok
trap ;backward offset
psb_test
bne psb_back
trap ;branch should be taken
psb_fwok
;initialize BSS segment
if load_data_direct != 1
ldx #zp_end-zp_init-1
ld_zp lda zp_init,x
sta zp_bss,x
dex
bpl ld_zp
ldx #data_end-data_init-1
ld_data lda data_init,x
sta data_bss,x
dex
bpl ld_data
if ROM_vectors = 1
ldx #5
ld_vect lda vec_init,x
sta vec_bss,x
dex
bpl ld_vect
endif
endif
;retain status of interrupt flag
if I_flag = 2
php
pla
and #4 ;isolate flag
sta flag_I_on ;or mask
eor #lo(~4) ;reverse
sta flag_I_off ;and mask
endif
;generate checksum for RAM integrity test
if ram_top > -1
lda #0
sta zpt ;set low byte of indirect pointer
sta ram_chksm+1 ;checksum high byte
if disable_selfmod = 0
sta range_adr ;reset self modifying code
endif
clc
ldx #zp_bss-zero_page ;zeropage - write test area
gcs3 adc zero_page,x
bcc gcs2
inc ram_chksm+1 ;carry to high byte
clc
gcs2 inx
bne gcs3
ldx #hi(abs1) ;set high byte of indirect pointer
stx zpt+1
ldy #lo(abs1) ;data after write & execute test area
gcs5 adc (zpt),y
bcc gcs4
inc ram_chksm+1 ;carry to high byte
clc
gcs4 iny
bne gcs5
inx ;advance RAM high address
stx zpt+1
cpx #ram_top
bne gcs5
sta ram_chksm ;checksum complete
endif
next_test
if disable_selfmod = 0
;testing relative addressing with BEQ
ldy #$fe ;testing maximum range, not -1/-2 (invalid/self adr)
range_loop
dey ;next relative address
tya
tax ;precharge count to end of loop
bpl range_fw ;calculate relative address
clc ;avoid branch self or to relative address of branch
adc #2
nop ;offset landing zone - tolerate +/-5 offset to branch
nop
nop
nop
nop
range_fw
nop
nop
nop
nop
nop
eor #$7f ;complement except sign
sta range_adr ;load into test target
lda #0 ;should set zero flag in status register
jmp range_op
dex ; offset landing zone - backward branch too far
dex
dex
dex
dex
;relative address target field with branch under test in the middle
dex ;-128 - max backward
dex
dex
dex
dex
dex
dex
dex
dex ;-120
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;-110
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;-100
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;-90
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;-80
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;-70
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;-60
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;-50
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;-40
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;-30
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;-20
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;-10
dex
dex
dex
dex
dex
dex
dex ;-3
range_op ;test target with zero flag=0, z=1 if previous dex
range_adr = *+1 ;modifiable relative address
beq *+64 ;+64 if called without modification
dex ;+0
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+10
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+20
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+30
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+40
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+50
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+60
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+70
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+80
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+90
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+100
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+110
dex
dex
dex
dex
dex
dex
dex
dex
dex
dex ;+120
dex
dex
dex
dex
dex
dex
nop ;offset landing zone - forward branch too far
nop
nop
nop
nop
beq range_ok ;+127 - max forward
trap ; bad range
nop ;offset landing zone - tolerate +/-5 offset to branch
nop
nop
nop
nop
range_ok
nop
nop
nop
nop
nop
cpy #0
beq range_end
jmp range_loop
range_end ;range test successful
endif
next_test
;partial test BNE & CMP, CPX, CPY immediate
cpy #1 ;testing BNE true
bne test_bne
trap
test_bne
lda #0
cmp #0 ;test compare immediate
trap_ne
trap_cc
trap_mi
cmp #1
trap_eq
trap_cs
trap_pl
tax
cpx #0 ;test compare x immediate
trap_ne
trap_cc
trap_mi
cpx #1
trap_eq
trap_cs
trap_pl
tay
cpy #0 ;test compare y immediate
trap_ne
trap_cc
trap_mi
cpy #1
trap_eq
trap_cs
trap_pl
next_test
;testing stack operations PHA PHP PLA PLP
ldx #$ff ;initialize stack
txs
lda #$55
pha
lda #$aa
pha
cmp $1fe ;on stack ?
trap_ne
tsx
txa ;overwrite accu
cmp #$fd ;sp decremented?
trap_ne
pla
cmp #$aa ;successful retreived from stack?
trap_ne
pla
cmp #$55
trap_ne
cmp $1ff ;remains on stack?
trap_ne
tsx
cpx #$ff ;sp incremented?
trap_ne
next_test
;testing branch decisions BPL BMI BVC BVS BCC BCS BNE BEQ
set_stat $ff ;all on
bpl nbr1 ;branches should not be taken
bvc nbr2
bcc nbr3
bne nbr4
bmi br1 ;branches should be taken
trap
br1 bvs br2
trap
br2 bcs br3
trap
br3 beq br4
trap
nbr1
trap ;previous bpl taken
nbr2
trap ;previous bvc taken
nbr3
trap ;previous bcc taken
nbr4
trap ;previous bne taken
br4 php
tsx
cpx #$fe ;sp after php?
trap_ne
pla
cmp_flag $ff ;returned all flags on?
trap_ne
tsx
cpx #$ff ;sp after php?
trap_ne
set_stat 0 ;all off
bmi nbr11 ;branches should not be taken
bvs nbr12
bcs nbr13
beq nbr14
bpl br11 ;branches should be taken
trap
br11 bvc br12
trap
br12 bcc br13
trap
br13 bne br14
trap
nbr11
trap ;previous bmi taken
nbr12
trap ;previous bvs taken
nbr13
trap ;previous bcs taken
nbr14
trap ;previous beq taken
br14 php
pla
cmp_flag 0 ;flags off except break (pushed by sw) + reserved?
trap_ne
;crosscheck flags
set_stat zero
bne brzs1
beq brzs2
brzs1
trap ;branch zero/non zero
brzs2 bcs brzs3
bcc brzs4
brzs3
trap ;branch carry/no carry
brzs4 bmi brzs5
bpl brzs6
brzs5
trap ;branch minus/plus
brzs6 bvs brzs7
bvc brzs8
brzs7
trap ;branch overflow/no overflow
brzs8
set_stat carry
beq brcs1
bne brcs2
brcs1
trap ;branch zero/non zero
brcs2 bcc brcs3
bcs brcs4
brcs3
trap ;branch carry/no carry
brcs4 bmi brcs5
bpl brcs6
brcs5
trap ;branch minus/plus
brcs6 bvs brcs7
bvc brcs8
brcs7
trap ;branch overflow/no overflow
brcs8
set_stat minus
beq brmi1
bne brmi2
brmi1
trap ;branch zero/non zero
brmi2 bcs brmi3
bcc brmi4
brmi3
trap ;branch carry/no carry
brmi4 bpl brmi5
bmi brmi6
brmi5
trap ;branch minus/plus
brmi6 bvs brmi7
bvc brmi8
brmi7
trap ;branch overflow/no overflow
brmi8
set_stat overfl
beq brvs1
bne brvs2
brvs1
trap ;branch zero/non zero
brvs2 bcs brvs3
bcc brvs4
brvs3
trap ;branch carry/no carry
brvs4 bmi brvs5
bpl brvs6
brvs5
trap ;branch minus/plus
brvs6 bvc brvs7
bvs brvs8
brvs7
trap ;branch overflow/no overflow
brvs8
set_stat $ff-zero
beq brzc1
bne brzc2
brzc1
trap ;branch zero/non zero
brzc2 bcc brzc3
bcs brzc4
brzc3
trap ;branch carry/no carry
brzc4 bpl brzc5
bmi brzc6
brzc5
trap ;branch minus/plus
brzc6 bvc brzc7
bvs brzc8
brzc7
trap ;branch overflow/no overflow
brzc8
set_stat $ff-carry
bne brcc1
beq brcc2
brcc1
trap ;branch zero/non zero
brcc2 bcs brcc3
bcc brcc4
brcc3
trap ;branch carry/no carry
brcc4 bpl brcc5
bmi brcc6
brcc5
trap ;branch minus/plus
brcc6 bvc brcc7
bvs brcc8
brcc7
trap ;branch overflow/no overflow
brcc8
set_stat $ff-minus
bne brpl1
beq brpl2
brpl1
trap ;branch zero/non zero
brpl2 bcc brpl3
bcs brpl4
brpl3
trap ;branch carry/no carry
brpl4 bmi brpl5
bpl brpl6
brpl5
trap ;branch minus/plus
brpl6 bvc brpl7
bvs brpl8
brpl7
trap ;branch overflow/no overflow
brpl8
set_stat $ff-overfl
bne brvc1
beq brvc2
brvc1
trap ;branch zero/non zero
brvc2 bcc brvc3
bcs brvc4
brvc3
trap ;branch carry/no carry
brvc4 bpl brvc5
bmi brvc6
brvc5
trap ;branch minus/plus
brvc6 bvs brvc7
bvc brvc8
brvc7
trap ;branch overflow/no overflow
brvc8
next_test
; test PHA does not alter flags or accumulator but PLA does
ldx #$55 ;x & y protected
ldy #$aa
set_a 1,$ff ;push
pha
tst_a 1,$ff
set_a 0,0
pha
tst_a 0,0
set_a $ff,$ff
pha
tst_a $ff,$ff
set_a 1,0
pha
tst_a 1,0
set_a 0,$ff
pha
tst_a 0,$ff
set_a $ff,0
pha
tst_a $ff,0
set_a 0,$ff ;pull
pla
tst_a $ff,$ff-zero
set_a $ff,0
pla
tst_a 0,zero
set_a $fe,$ff
pla
tst_a 1,$ff-zero-minus
set_a 0,0
pla
tst_a $ff,minus
set_a $ff,$ff
pla
tst_a 0,$ff-minus
set_a $fe,0
pla
tst_a 1,0
cpx #$55 ;x & y unchanged?
trap_ne
cpy #$aa
trap_ne
next_test
; partial pretest EOR #
set_a $3c,0
eor #$c3
tst_a $ff,fn
set_a $c3,0
eor #$c3
tst_a 0,fz
next_test
; PC modifying instructions except branches (NOP, JMP, JSR, RTS, BRK, RTI)
; testing NOP
ldx #$24
ldy #$42
set_a $18,0
nop
tst_a $18,0
cpx #$24
trap_ne
cpy #$42
trap_ne
ldx #$db
ldy #$bd
set_a $e7,$ff
nop
tst_a $e7,$ff
cpx #$db
trap_ne
cpy #$bd
trap_ne
next_test
; jump absolute
set_stat $0
lda #'F'
ldx #'A'
ldy #'R' ;N=0, V=0, Z=0, C=0
jmp test_far
nop
nop
trap_ne ;runover protection
inx
inx
far_ret
trap_eq ;returned flags OK?
trap_pl
trap_cc
trap_vc
cmp #('F'^$aa) ;returned registers OK?
trap_ne
cpx #('A'+1)
trap_ne
cpy #('R'-3)
trap_ne
dex
iny
iny
iny
eor #$aa ;N=0, V=1, Z=0, C=1
jmp test_near
nop
nop
trap_ne ;runover protection
inx
inx
test_near
trap_eq ;passed flags OK?
trap_mi
trap_cc
trap_vc
cmp #'F' ;passed registers OK?
trap_ne
cpx #'A'
trap_ne
cpy #'R'
trap_ne
next_test
; jump indirect
set_stat 0
lda #'I'
ldx #'N'
ldy #'D' ;N=0, V=0, Z=0, C=0
jmp (ptr_tst_ind)
nop
trap_ne ;runover protection
dey
dey
ind_ret
php ;either SP or Y count will fail, if we do not hit
dey
dey
dey
plp
trap_eq ;returned flags OK?
trap_pl
trap_cc
trap_vc
cmp #('I'^$aa) ;returned registers OK?
trap_ne
cpx #('N'+1)
trap_ne
cpy #('D'-6)
trap_ne
tsx ;SP check
cpx #$ff
trap_ne
next_test
; jump subroutine & return from subroutine
set_stat 0
lda #'J'
ldx #'S'
ldy #'R' ;N=0, V=0, Z=0, C=0
jsr test_jsr
jsr_ret = *-1 ;last address of jsr = return address
php ;either SP or Y count will fail, if we do not hit
dey
dey
dey
plp
trap_eq ;returned flags OK?
trap_pl
trap_cc
trap_vc
cmp #('J'^$aa) ;returned registers OK?
trap_ne
cpx #('S'+1)
trap_ne
cpy #('R'-6)
trap_ne
tsx ;sp?
cpx #$ff
trap_ne
next_test
; break & return from interrupt
if ROM_vectors = 1
load_flag 0 ;with interrupts enabled if allowed!
pha
lda #'B'
ldx #'R'
ldy #'K'
plp ;N=0, V=0, Z=0, C=0
brk
else
lda #hi brk_ret0 ;emulated break
pha
lda #lo brk_ret0
pha
load_flag fao ;set break & unused on stack
pha
load_flag intdis ;during interrupt
pha
lda #'B'
ldx #'R'
ldy #'K'
plp ;N=0, V=0, Z=0, C=0
jmp irq_trap
endif
dey ;should not be executed
brk_ret0 ;address of break return
php ;either SP or Y count will fail, if we do not hit
dey
dey
dey
cmp #'B'^$aa ;returned registers OK?
;the IRQ vector was never executed if A & X stay unmodified
trap_ne
cpx #'R'+1
trap_ne
cpy #'K'-6
trap_ne
pla ;returned flags OK (unchanged)?
cmp_flag 0
trap_ne
tsx ;sp?
cpx #$ff
trap_ne
if ROM_vectors = 1
load_flag $ff ;with interrupts disabled if allowed!
pha
lda #$ff-'B'
ldx #$ff-'R'
ldy #$ff-'K'
plp ;N=1, V=1, Z=1, C=1
brk
else
lda #hi brk_ret1 ;emulated break
pha
lda #lo brk_ret1
pha
load_flag $ff
pha ;set break & unused on stack
pha ;actual flags
lda #$ff-'B'
ldx #$ff-'R'
ldy #$ff-'K'
plp ;N=1, V=1, Z=1, C=1
jmp irq_trap
endif
dey ;should not be executed
brk_ret1 ;address of break return
php ;either SP or Y count will fail, if we do not hit
dey
dey
dey
cmp #($ff-'B')^$aa ;returned registers OK?
;the IRQ vector was never executed if A & X stay unmodified
trap_ne
cpx #$ff-'R'+1
trap_ne
cpy #$ff-'K'-6
trap_ne
pla ;returned flags OK (unchanged)?
cmp_flag $ff
trap_ne
tsx ;sp?
cpx #$ff
trap_ne
next_test
; test set and clear flags CLC CLI CLD CLV SEC SEI SED
set_stat $ff
clc
tst_stat $ff-carry
sec
tst_stat $ff
if I_flag = 3
cli
tst_stat $ff-intdis
sei
tst_stat $ff
endif
cld
tst_stat $ff-decmode
sed
tst_stat $ff
clv
tst_stat $ff-overfl
set_stat 0
tst_stat 0
sec
tst_stat carry
clc
tst_stat 0
if I_flag = 3
sei
tst_stat intdis
cli
tst_stat 0
endif
sed
tst_stat decmode
cld
tst_stat 0
set_stat overfl
tst_stat overfl
clv
tst_stat 0
next_test
; testing index register increment/decrement and transfer
; INX INY DEX DEY TAX TXA TAY TYA
ldx #$fe
set_stat $ff
inx ;ff
tst_x $ff,$ff-zero
inx ;00
tst_x 0,$ff-minus
inx ;01
tst_x 1,$ff-minus-zero
dex ;00
tst_x 0,$ff-minus
dex ;ff
tst_x $ff,$ff-zero
dex ;fe
set_stat 0
inx ;ff
tst_x $ff,minus
inx ;00
tst_x 0,zero
inx ;01
tst_x 1,0
dex ;00
tst_x 0,zero
dex ;ff
tst_x $ff,minus
ldy #$fe
set_stat $ff
iny ;ff
tst_y $ff,$ff-zero
iny ;00
tst_y 0,$ff-minus
iny ;01
tst_y 1,$ff-minus-zero
dey ;00
tst_y 0,$ff-minus
dey ;ff
tst_y $ff,$ff-zero
dey ;fe
set_stat 0
iny ;ff
tst_y $ff,0+minus
iny ;00
tst_y 0,zero
iny ;01
tst_y 1,0
dey ;00
tst_y 0,zero
dey ;ff
tst_y $ff,minus
ldx #$ff
set_stat $ff
txa
tst_a $ff,$ff-zero
php
inx ;00
plp
txa
tst_a 0,$ff-minus
php
inx ;01
plp
txa
tst_a 1,$ff-minus-zero
set_stat 0
txa
tst_a 1,0
php
dex ;00
plp
txa
tst_a 0,zero
php
dex ;ff
plp
txa
tst_a $ff,minus
ldy #$ff
set_stat $ff
tya
tst_a $ff,$ff-zero
php
iny ;00
plp
tya
tst_a 0,$ff-minus
php
iny ;01
plp
tya
tst_a 1,$ff-minus-zero
set_stat 0
tya
tst_a 1,0
php
dey ;00
plp
tya
tst_a 0,zero
php
dey ;ff
plp
tya
tst_a $ff,minus
load_flag $ff
pha
ldx #$ff ;ff
txa
plp
tay
tst_y $ff,$ff-zero
php
inx ;00
txa
plp
tay
tst_y 0,$ff-minus
php
inx ;01
txa
plp
tay
tst_y 1,$ff-minus-zero
load_flag 0
pha
lda #0
txa
plp
tay
tst_y 1,0
php
dex ;00
txa
plp
tay
tst_y 0,zero
php
dex ;ff
txa
plp
tay
tst_y $ff,minus
load_flag $ff
pha
ldy #$ff ;ff
tya
plp
tax
tst_x $ff,$ff-zero
php
iny ;00
tya
plp
tax
tst_x 0,$ff-minus
php
iny ;01
tya
plp
tax
tst_x 1,$ff-minus-zero
load_flag 0
pha
lda #0 ;preset status
tya
plp
tax
tst_x 1,0
php
dey ;00
tya
plp
tax
tst_x 0,zero
php
dey ;ff
tya
plp
tax
tst_x $ff,minus
next_test
;TSX sets NZ - TXS does not
; This section also tests for proper stack wrap around.
ldx #1 ;01
set_stat $ff
txs
php
lda $101
cmp_flag $ff
trap_ne
set_stat 0
txs
php
lda $101
cmp_flag 0
trap_ne
dex ;00
set_stat $ff
txs
php
lda $100
cmp_flag $ff
trap_ne
set_stat 0
txs
php
lda $100
cmp_flag 0
trap_ne
dex ;ff
set_stat $ff
txs
php
lda $1ff
cmp_flag $ff
trap_ne
set_stat 0
txs
php
lda $1ff
cmp_flag 0
ldx #1
txs ;sp=01
set_stat $ff
tsx ;clears Z, N
php ;sp=00
cpx #1
trap_ne
lda $101
cmp_flag $ff-minus-zero
trap_ne
set_stat $ff
tsx ;clears N, sets Z
php ;sp=ff
cpx #0
trap_ne
lda $100
cmp_flag $ff-minus
trap_ne
set_stat $ff
tsx ;clears N, sets Z
php ;sp=fe
cpx #$ff
trap_ne
lda $1ff
cmp_flag $ff-zero
trap_ne
ldx #1
txs ;sp=01
set_stat 0
tsx ;clears Z, N
php ;sp=00
cpx #1
trap_ne
lda $101
cmp_flag 0
trap_ne
set_stat 0
tsx ;clears N, sets Z
php ;sp=ff
cpx #0
trap_ne
lda $100
cmp_flag zero
trap_ne
set_stat 0
tsx ;clears N, sets Z
php ;sp=fe
cpx #$ff
trap_ne
lda $1ff
cmp_flag minus
trap_ne
pla ;sp=ff
next_test
; testing index register load & store LDY LDX STY STX all addressing modes
; LDX / STX - zp,y / abs,y
ldy #3
tldx
set_stat 0
ldx zp1,y
php ;test stores do not alter flags
txa
eor #$c3
plp
sta abst,y
php ;flags after load/store sequence
eor #$c3
cmp abs1,y ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx,y ;test flags
trap_ne
dey
bpl tldx
ldy #3
tldx1
set_stat $ff
ldx zp1,y
php ;test stores do not alter flags
txa
eor #$c3
plp
sta abst,y
php ;flags after load/store sequence
eor #$c3
cmp abs1,y ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx,y ;test flags
trap_ne
dey
bpl tldx1
ldy #3
tldx2
set_stat 0
ldx abs1,y
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx zpt,y
php ;flags after load/store sequence
eor #$c3
cmp zp1,y ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx,y ;test flags
trap_ne
dey
bpl tldx2
ldy #3
tldx3
set_stat $ff
ldx abs1,y
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx zpt,y
php ;flags after load/store sequence
eor #$c3
cmp zp1,y ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx,y ;test flags
trap_ne
dey
bpl tldx3
ldy #3 ;testing store result
ldx #0
tstx lda zpt,y
eor #$c3
cmp zp1,y
trap_ne ;store to zp data
stx zpt,y ;clear
lda abst,y
eor #$c3
cmp abs1,y
trap_ne ;store to abs data
txa
sta abst,y ;clear
dey
bpl tstx
next_test
; indexed wraparound test (only zp should wrap)
ldy #3+$fa
tldx4 ldx zp1-$fa&$ff,y ;wrap on indexed zp
txa
sta abst-$fa,y ;no STX abs,y!
dey
cpy #$fa
bcs tldx4
ldy #3+$fa
tldx5 ldx abs1-$fa,y ;no wrap on indexed abs
stx zpt-$fa&$ff,y
dey
cpy #$fa
bcs tldx5
ldy #3 ;testing wraparound result
ldx #0
tstx1 lda zpt,y
cmp zp1,y
trap_ne ;store to zp data
stx zpt,y ;clear
lda abst,y
cmp abs1,y
trap_ne ;store to abs data
txa
sta abst,y ;clear
dey
bpl tstx1
next_test
; LDY / STY - zp,x / abs,x
ldx #3
tldy
set_stat 0
ldy zp1,x
php ;test stores do not alter flags
tya
eor #$c3
plp
sta abst,x
php ;flags after load/store sequence
eor #$c3
cmp abs1,x ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx,x ;test flags
trap_ne
dex
bpl tldy
ldx #3
tldy1
set_stat $ff
ldy zp1,x
php ;test stores do not alter flags
tya
eor #$c3
plp
sta abst,x
php ;flags after load/store sequence
eor #$c3
cmp abs1,x ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx,x ;test flags
trap_ne
dex
bpl tldy1
ldx #3
tldy2
set_stat 0
ldy abs1,x
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty zpt,x
php ;flags after load/store sequence
eor #$c3
cmp zp1,x ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx,x ;test flags
trap_ne
dex
bpl tldy2
ldx #3
tldy3
set_stat $ff
ldy abs1,x
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty zpt,x
php ;flags after load/store sequence
eor #$c3
cmp zp1,x ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx,x ;test flags
trap_ne
dex
bpl tldy3
ldx #3 ;testing store result
ldy #0
tsty lda zpt,x
eor #$c3
cmp zp1,x
trap_ne ;store to zp,x data
sty zpt,x ;clear
lda abst,x
eor #$c3
cmp abs1,x
trap_ne ;store to abs,x data
txa
sta abst,x ;clear
dex
bpl tsty
next_test
; indexed wraparound test (only zp should wrap)
ldx #3+$fa
tldy4 ldy zp1-$fa&$ff,x ;wrap on indexed zp
tya
sta abst-$fa,x ;no STX abs,x!
dex
cpx #$fa
bcs tldy4
ldx #3+$fa
tldy5 ldy abs1-$fa,x ;no wrap on indexed abs
sty zpt-$fa&$ff,x
dex
cpx #$fa
bcs tldy5
ldx #3 ;testing wraparound result
ldy #0
tsty1 lda zpt,x
cmp zp1,x
trap_ne ;store to zp,x data
sty zpt,x ;clear
lda abst,x
cmp abs1,x
trap_ne ;store to abs,x data
txa
sta abst,x ;clear
dex
bpl tsty1
next_test
; LDX / STX - zp / abs / #
set_stat 0
ldx zp1
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx abst
php ;flags after load/store sequence
eor #$c3
tax
cpx #$c3 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx ;test flags
trap_ne
set_stat 0
ldx zp1+1
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx abst+1
php ;flags after load/store sequence
eor #$c3
tax
cpx #$82 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+1 ;test flags
trap_ne
set_stat 0
ldx zp1+2
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx abst+2
php ;flags after load/store sequence
eor #$c3
tax
cpx #$41 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+2 ;test flags
trap_ne
set_stat 0
ldx zp1+3
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx abst+3
php ;flags after load/store sequence
eor #$c3
tax
cpx #0 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+3 ;test flags
trap_ne
set_stat $ff
ldx zp1
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx abst
php ;flags after load/store sequence
eor #$c3
tax
cpx #$c3 ;test result
trap_ne ;
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx ;test flags
trap_ne
set_stat $ff
ldx zp1+1
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx abst+1
php ;flags after load/store sequence
eor #$c3
tax
cpx #$82 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+1 ;test flags
trap_ne
set_stat $ff
ldx zp1+2
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx abst+2
php ;flags after load/store sequence
eor #$c3
tax
cpx #$41 ;test result
trap_ne ;
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+2 ;test flags
trap_ne
set_stat $ff
ldx zp1+3
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx abst+3
php ;flags after load/store sequence
eor #$c3
tax
cpx #0 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+3 ;test flags
trap_ne
set_stat 0
ldx abs1
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx zpt
php ;flags after load/store sequence
eor #$c3
cmp zp1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx ;test flags
trap_ne
set_stat 0
ldx abs1+1
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx zpt+1
php ;flags after load/store sequence
eor #$c3
cmp zp1+1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+1 ;test flags
trap_ne
set_stat 0
ldx abs1+2
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx zpt+2
php ;flags after load/store sequence
eor #$c3
cmp zp1+2 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+2 ;test flags
trap_ne
set_stat 0
ldx abs1+3
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx zpt+3
php ;flags after load/store sequence
eor #$c3
cmp zp1+3 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+3 ;test flags
trap_ne
set_stat $ff
ldx abs1
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx zpt
php ;flags after load/store sequence
eor #$c3
tax
cpx zp1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx ;test flags
trap_ne
set_stat $ff
ldx abs1+1
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx zpt+1
php ;flags after load/store sequence
eor #$c3
tax
cpx zp1+1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+1 ;test flags
trap_ne
set_stat $ff
ldx abs1+2
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx zpt+2
php ;flags after load/store sequence
eor #$c3
tax
cpx zp1+2 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+2 ;test flags
trap_ne
set_stat $ff
ldx abs1+3
php ;test stores do not alter flags
txa
eor #$c3
tax
plp
stx zpt+3
php ;flags after load/store sequence
eor #$c3
tax
cpx zp1+3 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+3 ;test flags
trap_ne
set_stat 0
ldx #$c3
php
cpx abs1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx ;test flags
trap_ne
set_stat 0
ldx #$82
php
cpx abs1+1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+1 ;test flags
trap_ne
set_stat 0
ldx #$41
php
cpx abs1+2 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+2 ;test flags
trap_ne
set_stat 0
ldx #0
php
cpx abs1+3 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+3 ;test flags
trap_ne
set_stat $ff
ldx #$c3
php
cpx abs1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx ;test flags
trap_ne
set_stat $ff
ldx #$82
php
cpx abs1+1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+1 ;test flags
trap_ne
set_stat $ff
ldx #$41
php
cpx abs1+2 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+2 ;test flags
trap_ne
set_stat $ff
ldx #0
php
cpx abs1+3 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+3 ;test flags
trap_ne
ldx #0
lda zpt
eor #$c3
cmp zp1
trap_ne ;store to zp data
stx zpt ;clear
lda abst
eor #$c3
cmp abs1
trap_ne ;store to abs data
stx abst ;clear
lda zpt+1
eor #$c3
cmp zp1+1
trap_ne ;store to zp data
stx zpt+1 ;clear
lda abst+1
eor #$c3
cmp abs1+1
trap_ne ;store to abs data
stx abst+1 ;clear
lda zpt+2
eor #$c3
cmp zp1+2
trap_ne ;store to zp data
stx zpt+2 ;clear
lda abst+2
eor #$c3
cmp abs1+2
trap_ne ;store to abs data
stx abst+2 ;clear
lda zpt+3
eor #$c3
cmp zp1+3
trap_ne ;store to zp data
stx zpt+3 ;clear
lda abst+3
eor #$c3
cmp abs1+3
trap_ne ;store to abs data
stx abst+3 ;clear
next_test
; LDY / STY - zp / abs / #
set_stat 0
ldy zp1
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty abst
php ;flags after load/store sequence
eor #$c3
tay
cpy #$c3 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx ;test flags
trap_ne
set_stat 0
ldy zp1+1
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty abst+1
php ;flags after load/store sequence
eor #$c3
tay
cpy #$82 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+1 ;test flags
trap_ne
set_stat 0
ldy zp1+2
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty abst+2
php ;flags after load/store sequence
eor #$c3
tay
cpy #$41 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+2 ;test flags
trap_ne
set_stat 0
ldy zp1+3
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty abst+3
php ;flags after load/store sequence
eor #$c3
tay
cpy #0 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+3 ;test flags
trap_ne
set_stat $ff
ldy zp1
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty abst
php ;flags after load/store sequence
eor #$c3
tay
cpy #$c3 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx ;test flags
trap_ne
set_stat $ff
ldy zp1+1
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty abst+1
php ;flags after load/store sequence
eor #$c3
tay
cpy #$82 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+1 ;test flags
trap_ne
set_stat $ff
ldy zp1+2
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty abst+2
php ;flags after load/store sequence
eor #$c3
tay
cpy #$41 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+2 ;test flags
trap_ne
set_stat $ff
ldy zp1+3
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty abst+3
php ;flags after load/store sequence
eor #$c3
tay
cpy #0 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+3 ;test flags
trap_ne
set_stat 0
ldy abs1
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty zpt
php ;flags after load/store sequence
eor #$c3
tay
cpy zp1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx ;test flags
trap_ne
set_stat 0
ldy abs1+1
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty zpt+1
php ;flags after load/store sequence
eor #$c3
tay
cpy zp1+1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+1 ;test flags
trap_ne
set_stat 0
ldy abs1+2
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty zpt+2
php ;flags after load/store sequence
eor #$c3
tay
cpy zp1+2 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+2 ;test flags
trap_ne
set_stat 0
ldy abs1+3
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty zpt+3
php ;flags after load/store sequence
eor #$c3
tay
cpy zp1+3 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+3 ;test flags
trap_ne
set_stat $ff
ldy abs1
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty zpt
php ;flags after load/store sequence
eor #$c3
tay
cmp zp1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx ;test flags
trap_ne
set_stat $ff
ldy abs1+1
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty zpt+1
php ;flags after load/store sequence
eor #$c3
tay
cmp zp1+1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+1 ;test flags
trap_ne
set_stat $ff
ldy abs1+2
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty zpt+2
php ;flags after load/store sequence
eor #$c3
tay
cmp zp1+2 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+2 ;test flags
trap_ne
set_stat $ff
ldy abs1+3
php ;test stores do not alter flags
tya
eor #$c3
tay
plp
sty zpt+3
php ;flags after load/store sequence
eor #$c3
tay
cmp zp1+3 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+3 ;test flags
trap_ne
set_stat 0
ldy #$c3
php
cpy abs1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx ;test flags
trap_ne
set_stat 0
ldy #$82
php
cpy abs1+1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+1 ;test flags
trap_ne
set_stat 0
ldy #$41
php
cpy abs1+2 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+2 ;test flags
trap_ne
set_stat 0
ldy #0
php
cpy abs1+3 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+3 ;test flags
trap_ne
set_stat $ff
ldy #$c3
php
cpy abs1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx ;test flags
trap_ne
set_stat $ff
ldy #$82
php
cpy abs1+1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+1 ;test flags
trap_ne
set_stat $ff
ldy #$41
php
cpy abs1+2 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+2 ;test flags
trap_ne
set_stat $ff
ldy #0
php
cpy abs1+3 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+3 ;test flags
trap_ne
ldy #0
lda zpt
eor #$c3
cmp zp1
trap_ne ;store to zp data
sty zpt ;clear
lda abst
eor #$c3
cmp abs1
trap_ne ;store to abs data
sty abst ;clear
lda zpt+1
eor #$c3
cmp zp1+1
trap_ne ;store to zp+1 data
sty zpt+1 ;clear
lda abst+1
eor #$c3
cmp abs1+1
trap_ne ;store to abs+1 data
sty abst+1 ;clear
lda zpt+2
eor #$c3
cmp zp1+2
trap_ne ;store to zp+2 data
sty zpt+2 ;clear
lda abst+2
eor #$c3
cmp abs1+2
trap_ne ;store to abs+2 data
sty abst+2 ;clear
lda zpt+3
eor #$c3
cmp zp1+3
trap_ne ;store to zp+3 data
sty zpt+3 ;clear
lda abst+3
eor #$c3
cmp abs1+3
trap_ne ;store to abs+3 data
sty abst+3 ;clear
next_test
; testing load / store accumulator LDA / STA all addressing modes
; LDA / STA - zp,x / abs,x
ldx #3
tldax
set_stat 0
lda zp1,x
php ;test stores do not alter flags
eor #$c3
plp
sta abst,x
php ;flags after load/store sequence
eor #$c3
cmp abs1,x ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx,x ;test flags
trap_ne
dex
bpl tldax
ldx #3
tldax1
set_stat $ff
lda zp1,x
php ;test stores do not alter flags
eor #$c3
plp
sta abst,x
php ;flags after load/store sequence
eor #$c3
cmp abs1,x ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx,x ;test flags
trap_ne
dex
bpl tldax1
ldx #3
tldax2
set_stat 0
lda abs1,x
php ;test stores do not alter flags
eor #$c3
plp
sta zpt,x
php ;flags after load/store sequence
eor #$c3
cmp zp1,x ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx,x ;test flags
trap_ne
dex
bpl tldax2
ldx #3
tldax3
set_stat $ff
lda abs1,x
php ;test stores do not alter flags
eor #$c3
plp
sta zpt,x
php ;flags after load/store sequence
eor #$c3
cmp zp1,x ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx,x ;test flags
trap_ne
dex
bpl tldax3
ldx #3 ;testing store result
ldy #0
tstax lda zpt,x
eor #$c3
cmp zp1,x
trap_ne ;store to zp,x data
sty zpt,x ;clear
lda abst,x
eor #$c3
cmp abs1,x
trap_ne ;store to abs,x data
txa
sta abst,x ;clear
dex
bpl tstax
next_test
; LDA / STA - (zp),y / abs,y / (zp,x)
ldy #3
tlday
set_stat 0
lda (ind1),y
php ;test stores do not alter flags
eor #$c3
plp
sta abst,y
php ;flags after load/store sequence
eor #$c3
cmp abs1,y ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx,y ;test flags
trap_ne
dey
bpl tlday
ldy #3
tlday1
set_stat $ff
lda (ind1),y
php ;test stores do not alter flags
eor #$c3
plp
sta abst,y
php ;flags after load/store sequence
eor #$c3
cmp abs1,y ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx,y ;test flags
trap_ne
dey
bpl tlday1
ldy #3 ;testing store result
ldx #0
tstay lda abst,y
eor #$c3
cmp abs1,y
trap_ne ;store to abs data
txa
sta abst,y ;clear
dey
bpl tstay
ldy #3
tlday2
set_stat 0
lda abs1,y
php ;test stores do not alter flags
eor #$c3
plp
sta (indt),y
php ;flags after load/store sequence
eor #$c3
cmp (ind1),y ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx,y ;test flags
trap_ne
dey
bpl tlday2
ldy #3
tlday3
set_stat $ff
lda abs1,y
php ;test stores do not alter flags
eor #$c3
plp
sta (indt),y
php ;flags after load/store sequence
eor #$c3
cmp (ind1),y ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx,y ;test flags
trap_ne
dey
bpl tlday3
ldy #3 ;testing store result
ldx #0
tstay1 lda abst,y
eor #$c3
cmp abs1,y
trap_ne ;store to abs data
txa
sta abst,y ;clear
dey
bpl tstay1
ldx #6
ldy #3
tldax4
set_stat 0
lda (ind1,x)
php ;test stores do not alter flags
eor #$c3
plp
sta (indt,x)
php ;flags after load/store sequence
eor #$c3
cmp abs1,y ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx,y ;test flags
trap_ne
dex
dex
dey
bpl tldax4
ldx #6
ldy #3
tldax5
set_stat $ff
lda (ind1,x)
php ;test stores do not alter flags
eor #$c3
plp
sta (indt,x)
php ;flags after load/store sequence
eor #$c3
cmp abs1,y ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx,y ;test flags
trap_ne
dex
dex
dey
bpl tldax5
ldy #3 ;testing store result
ldx #0
tstay2 lda abst,y
eor #$c3
cmp abs1,y
trap_ne ;store to abs data
txa
sta abst,y ;clear
dey
bpl tstay2
next_test
; indexed wraparound test (only zp should wrap)
ldx #3+$fa
tldax6 lda zp1-$fa&$ff,x ;wrap on indexed zp
sta abst-$fa,x ;no STX abs,x!
dex
cpx #$fa
bcs tldax6
ldx #3+$fa
tldax7 lda abs1-$fa,x ;no wrap on indexed abs
sta zpt-$fa&$ff,x
dex
cpx #$fa
bcs tldax7
ldx #3 ;testing wraparound result
ldy #0
tstax1 lda zpt,x
cmp zp1,x
trap_ne ;store to zp,x data
sty zpt,x ;clear
lda abst,x
cmp abs1,x
trap_ne ;store to abs,x data
txa
sta abst,x ;clear
dex
bpl tstax1
ldy #3+$f8
ldx #6+$f8
tlday4 lda (ind1-$f8&$ff,x) ;wrap on indexed zp indirect
sta abst-$f8,y
dex
dex
dey
cpy #$f8
bcs tlday4
ldy #3 ;testing wraparound result
ldx #0
tstay4 lda abst,y
cmp abs1,y
trap_ne ;store to abs data
txa
sta abst,y ;clear
dey
bpl tstay4
ldy #3+$f8
tlday5 lda abs1-$f8,y ;no wrap on indexed abs
sta (inwt),y
dey
cpy #$f8
bcs tlday5
ldy #3 ;testing wraparound result
ldx #0
tstay5 lda abst,y
cmp abs1,y
trap_ne ;store to abs data
txa
sta abst,y ;clear
dey
bpl tstay5
ldy #3+$f8
ldx #6+$f8
tlday6 lda (inw1),y ;no wrap on zp indirect indexed
sta (indt-$f8&$ff,x)
dex
dex
dey
cpy #$f8
bcs tlday6
ldy #3 ;testing wraparound result
ldx #0
tstay6 lda abst,y
cmp abs1,y
trap_ne ;store to abs data
txa
sta abst,y ;clear
dey
bpl tstay6
next_test
; LDA / STA - zp / abs / #
set_stat 0
lda zp1
php ;test stores do not alter flags
eor #$c3
plp
sta abst
php ;flags after load/store sequence
eor #$c3
cmp #$c3 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx ;test flags
trap_ne
set_stat 0
lda zp1+1
php ;test stores do not alter flags
eor #$c3
plp
sta abst+1
php ;flags after load/store sequence
eor #$c3
cmp #$82 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+1 ;test flags
trap_ne
set_stat 0
lda zp1+2
php ;test stores do not alter flags
eor #$c3
plp
sta abst+2
php ;flags after load/store sequence
eor #$c3
cmp #$41 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+2 ;test flags
trap_ne
set_stat 0
lda zp1+3
php ;test stores do not alter flags
eor #$c3
plp
sta abst+3
php ;flags after load/store sequence
eor #$c3
cmp #0 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+3 ;test flags
trap_ne
set_stat $ff
lda zp1
php ;test stores do not alter flags
eor #$c3
plp
sta abst
php ;flags after load/store sequence
eor #$c3
cmp #$c3 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx ;test flags
trap_ne
set_stat $ff
lda zp1+1
php ;test stores do not alter flags
eor #$c3
plp
sta abst+1
php ;flags after load/store sequence
eor #$c3
cmp #$82 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+1 ;test flags
trap_ne
set_stat $ff
lda zp1+2
php ;test stores do not alter flags
eor #$c3
plp
sta abst+2
php ;flags after load/store sequence
eor #$c3
cmp #$41 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+2 ;test flags
trap_ne
set_stat $ff
lda zp1+3
php ;test stores do not alter flags
eor #$c3
plp
sta abst+3
php ;flags after load/store sequence
eor #$c3
cmp #0 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+3 ;test flags
trap_ne
set_stat 0
lda abs1
php ;test stores do not alter flags
eor #$c3
plp
sta zpt
php ;flags after load/store sequence
eor #$c3
cmp zp1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx ;test flags
trap_ne
set_stat 0
lda abs1+1
php ;test stores do not alter flags
eor #$c3
plp
sta zpt+1
php ;flags after load/store sequence
eor #$c3
cmp zp1+1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+1 ;test flags
trap_ne
set_stat 0
lda abs1+2
php ;test stores do not alter flags
eor #$c3
plp
sta zpt+2
php ;flags after load/store sequence
eor #$c3
cmp zp1+2 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+2 ;test flags
trap_ne
set_stat 0
lda abs1+3
php ;test stores do not alter flags
eor #$c3
plp
sta zpt+3
php ;flags after load/store sequence
eor #$c3
cmp zp1+3 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+3 ;test flags
trap_ne
set_stat $ff
lda abs1
php ;test stores do not alter flags
eor #$c3
plp
sta zpt
php ;flags after load/store sequence
eor #$c3
cmp zp1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx ;test flags
trap_ne
set_stat $ff
lda abs1+1
php ;test stores do not alter flags
eor #$c3
plp
sta zpt+1
php ;flags after load/store sequence
eor #$c3
cmp zp1+1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+1 ;test flags
trap_ne
set_stat $ff
lda abs1+2
php ;test stores do not alter flags
eor #$c3
plp
sta zpt+2
php ;flags after load/store sequence
eor #$c3
cmp zp1+2 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+2 ;test flags
trap_ne
set_stat $ff
lda abs1+3
php ;test stores do not alter flags
eor #$c3
plp
sta zpt+3
php ;flags after load/store sequence
eor #$c3
cmp zp1+3 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+3 ;test flags
trap_ne
set_stat 0
lda #$c3
php
cmp abs1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx ;test flags
trap_ne
set_stat 0
lda #$82
php
cmp abs1+1 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+1 ;test flags
trap_ne
set_stat 0
lda #$41
php
cmp abs1+2 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+2 ;test flags
trap_ne
set_stat 0
lda #0
php
cmp abs1+3 ;test result
trap_ne
pla ;load status
eor_flag 0
cmp fLDx+3 ;test flags
trap_ne
set_stat $ff
lda #$c3
php
cmp abs1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx ;test flags
trap_ne
set_stat $ff
lda #$82
php
cmp abs1+1 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+1 ;test flags
trap_ne
set_stat $ff
lda #$41
php
cmp abs1+2 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+2 ;test flags
trap_ne
set_stat $ff
lda #0
php
cmp abs1+3 ;test result
trap_ne
pla ;load status
eor_flag lo~fnz ;mask bits not altered
cmp fLDx+3 ;test flags
trap_ne
ldx #0
lda zpt
eor #$c3
cmp zp1
trap_ne ;store to zp data
stx zpt ;clear
lda abst
eor #$c3
cmp abs1
trap_ne ;store to abs data
stx abst ;clear
lda zpt+1
eor #$c3
cmp zp1+1
trap_ne ;store to zp data
stx zpt+1 ;clear
lda abst+1
eor #$c3
cmp abs1+1
trap_ne ;store to abs data
stx abst+1 ;clear
lda zpt+2
eor #$c3
cmp zp1+2
trap_ne ;store to zp data
stx zpt+2 ;clear
lda abst+2
eor #$c3
cmp abs1+2
trap_ne ;store to abs data
stx abst+2 ;clear
lda zpt+3
eor #$c3
cmp zp1+3
trap_ne ;store to zp data
stx zpt+3 ;clear
lda abst+3
eor #$c3
cmp abs1+3
trap_ne ;store to abs data
stx abst+3 ;clear
next_test
; testing bit test & compares BIT CPX CPY CMP all addressing modes
; BIT - zp / abs
set_a $ff,0
bit zp1+3 ;00 - should set Z / clear NV
tst_a $ff,fz
set_a 1,0
bit zp1+2 ;41 - should set V (M6) / clear NZ
tst_a 1,fv
set_a 1,0
bit zp1+1 ;82 - should set N (M7) & Z / clear V
tst_a 1,fnz
set_a 1,0
bit zp1 ;c3 - should set N (M7) & V (M6) / clear Z
tst_a 1,fnv
set_a $ff,$ff
bit zp1+3 ;00 - should set Z / clear NV
tst_a $ff,~fnv
set_a 1,$ff
bit zp1+2 ;41 - should set V (M6) / clear NZ
tst_a 1,~fnz
set_a 1,$ff
bit zp1+1 ;82 - should set N (M7) & Z / clear V
tst_a 1,~fv
set_a 1,$ff
bit zp1 ;c3 - should set N (M7) & V (M6) / clear Z
tst_a 1,~fz
set_a $ff,0
bit abs1+3 ;00 - should set Z / clear NV
tst_a $ff,fz
set_a 1,0
bit abs1+2 ;41 - should set V (M6) / clear NZ
tst_a 1,fv
set_a 1,0
bit abs1+1 ;82 - should set N (M7) & Z / clear V
tst_a 1,fnz
set_a 1,0
bit abs1 ;c3 - should set N (M7) & V (M6) / clear Z
tst_a 1,fnv
set_a $ff,$ff
bit abs1+3 ;00 - should set Z / clear NV
tst_a $ff,~fnv
set_a 1,$ff
bit abs1+2 ;41 - should set V (M6) / clear NZ
tst_a 1,~fnz
set_a 1,$ff
bit abs1+1 ;82 - should set N (M7) & Z / clear V
tst_a 1,~fv
set_a 1,$ff
bit abs1 ;c3 - should set N (M7) & V (M6) / clear Z
tst_a 1,~fz
next_test
; CPX - zp / abs / #
set_x $80,0
cpx zp7f
tst_stat fc
dex
cpx zp7f
tst_stat fzc
dex
cpx zp7f
tst_x $7e,fn
set_x $80,$ff
cpx zp7f
tst_stat ~fnz
dex
cpx zp7f
tst_stat ~fn
dex
cpx zp7f
tst_x $7e,~fzc
set_x $80,0
cpx abs7f
tst_stat fc
dex
cpx abs7f
tst_stat fzc
dex
cpx abs7f
tst_x $7e,fn
set_x $80,$ff
cpx abs7f
tst_stat ~fnz
dex
cpx abs7f
tst_stat ~fn
dex
cpx abs7f
tst_x $7e,~fzc
set_x $80,0
cpx #$7f
tst_stat fc
dex
cpx #$7f
tst_stat fzc
dex
cpx #$7f
tst_x $7e,fn
set_x $80,$ff
cpx #$7f
tst_stat ~fnz
dex
cpx #$7f
tst_stat ~fn
dex
cpx #$7f
tst_x $7e,~fzc
next_test
; CPY - zp / abs / #
set_y $80,0
cpy zp7f
tst_stat fc
dey
cpy zp7f
tst_stat fzc
dey
cpy zp7f
tst_y $7e,fn
set_y $80,$ff
cpy zp7f
tst_stat ~fnz
dey
cpy zp7f
tst_stat ~fn
dey
cpy zp7f
tst_y $7e,~fzc
set_y $80,0
cpy abs7f
tst_stat fc
dey
cpy abs7f
tst_stat fzc
dey
cpy abs7f
tst_y $7e,fn
set_y $80,$ff
cpy abs7f
tst_stat ~fnz
dey
cpy abs7f
tst_stat ~fn
dey
cpy abs7f
tst_y $7e,~fzc
set_y $80,0
cpy #$7f
tst_stat fc
dey
cpy #$7f
tst_stat fzc
dey
cpy #$7f
tst_y $7e,fn
set_y $80,$ff
cpy #$7f
tst_stat ~fnz
dey
cpy #$7f
tst_stat ~fn
dey
cpy #$7f
tst_y $7e,~fzc
next_test
; CMP - zp / abs / #
set_a $80,0
cmp zp7f
tst_a $80,fc
set_a $7f,0
cmp zp7f
tst_a $7f,fzc
set_a $7e,0
cmp zp7f
tst_a $7e,fn
set_a $80,$ff
cmp zp7f
tst_a $80,~fnz
set_a $7f,$ff
cmp zp7f
tst_a $7f,~fn
set_a $7e,$ff
cmp zp7f
tst_a $7e,~fzc
set_a $80,0
cmp abs7f
tst_a $80,fc
set_a $7f,0
cmp abs7f
tst_a $7f,fzc
set_a $7e,0
cmp abs7f
tst_a $7e,fn
set_a $80,$ff
cmp abs7f
tst_a $80,~fnz
set_a $7f,$ff
cmp abs7f
tst_a $7f,~fn
set_a $7e,$ff
cmp abs7f
tst_a $7e,~fzc
set_a $80,0
cmp #$7f
tst_a $80,fc
set_a $7f,0
cmp #$7f
tst_a $7f,fzc
set_a $7e,0
cmp #$7f
tst_a $7e,fn
set_a $80,$ff
cmp #$7f
tst_a $80,~fnz
set_a $7f,$ff
cmp #$7f
tst_a $7f,~fn
set_a $7e,$ff
cmp #$7f
tst_a $7e,~fzc
ldx #4 ;with indexing by X
set_a $80,0
cmp zp1,x
tst_a $80,fc
set_a $7f,0
cmp zp1,x
tst_a $7f,fzc
set_a $7e,0
cmp zp1,x
tst_a $7e,fn
set_a $80,$ff
cmp zp1,x
tst_a $80,~fnz
set_a $7f,$ff
cmp zp1,x
tst_a $7f,~fn
set_a $7e,$ff
cmp zp1,x
tst_a $7e,~fzc
set_a $80,0
cmp abs1,x
tst_a $80,fc
set_a $7f,0
cmp abs1,x
tst_a $7f,fzc
set_a $7e,0
cmp abs1,x
tst_a $7e,fn
set_a $80,$ff
cmp abs1,x
tst_a $80,~fnz
set_a $7f,$ff
cmp abs1,x
tst_a $7f,~fn
set_a $7e,$ff
cmp abs1,x
tst_a $7e,~fzc
ldy #4 ;with indexing by Y
ldx #8 ;with indexed indirect
set_a $80,0
cmp abs1,y
tst_a $80,fc
set_a $7f,0
cmp abs1,y
tst_a $7f,fzc
set_a $7e,0
cmp abs1,y
tst_a $7e,fn
set_a $80,$ff
cmp abs1,y
tst_a $80,~fnz
set_a $7f,$ff
cmp abs1,y
tst_a $7f,~fn
set_a $7e,$ff
cmp abs1,y
tst_a $7e,~fzc
set_a $80,0
cmp (ind1,x)
tst_a $80,fc
set_a $7f,0
cmp (ind1,x)
tst_a $7f,fzc
set_a $7e,0
cmp (ind1,x)
tst_a $7e,fn
set_a $80,$ff
cmp (ind1,x)
tst_a $80,~fnz
set_a $7f,$ff
cmp (ind1,x)
tst_a $7f,~fn
set_a $7e,$ff
cmp (ind1,x)
tst_a $7e,~fzc
set_a $80,0
cmp (ind1),y
tst_a $80,fc
set_a $7f,0
cmp (ind1),y
tst_a $7f,fzc
set_a $7e,0
cmp (ind1),y
tst_a $7e,fn
set_a $80,$ff
cmp (ind1),y
tst_a $80,~fnz
set_a $7f,$ff
cmp (ind1),y
tst_a $7f,~fn
set_a $7e,$ff
cmp (ind1),y
tst_a $7e,~fzc
next_test
; testing shifts - ASL LSR ROL ROR all addressing modes
; shifts - accumulator
ldx #5
tasl
set_ax zps,0
asl a
tst_ax rASL,fASL,0
dex
bpl tasl
ldx #5
tasl1
set_ax zps,$ff
asl a
tst_ax rASL,fASL,$ff-fnzc
dex
bpl tasl1
ldx #5
tlsr
set_ax zps,0
lsr a
tst_ax rLSR,fLSR,0
dex
bpl tlsr
ldx #5
tlsr1
set_ax zps,$ff
lsr a
tst_ax rLSR,fLSR,$ff-fnzc
dex
bpl tlsr1
ldx #5
trol
set_ax zps,0
rol a
tst_ax rROL,fROL,0
dex
bpl trol
ldx #5