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W65C02_extended_opcodes_test.lst
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AS65 Assembler for R6502 [1.42]. Copyright 1994-2007, Frank A. Kingswood Page 1
----------------------------------------------- W65C02_extended_opcodes_test.a65c ------------------------------------------------
2883 lines read, no errors in pass 1.
;
; 6 5 C 0 2 E X T E N D E D O P C O D E S T E S T
;
; Copyright (C) 2013-2017 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 additional 65C02 opcodes, addressing
; modes and functionality not available in the NMOS version of the 6502.
; The 6502_functional_test is a prerequisite to this test.
; NMI, IRQ, STP & WAI are covered in the 6502_interrupt_test.
;
; version 04-dec-2017
; contact info at http://2m5.de or email [email protected]
;
; assembled with AS65 from http://www.kingswood-consulting.co.uk/assemblers/
; command line switches: -l -m -s2 -w -x -h0
; | | | | | no page headers in listing
; | | | | 65C02 extensions
; | | | 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 65C02 only!
; Decimal ops will only be tested with valid BCD operands and the V flag will
; be ignored as it is absolutely useless in decimal mode.
;
; 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:
; 19-jul-2013 1st version distributed for testing
; 23-jul-2013 fixed BRA out of range due to larger trap macros
; added RAM integrity check
; 16-aug-2013 added error report to standard output option
; 23-aug-2015 change revoked
; 24-aug-2015 all self modifying immediate opcodes now execute in data RAM
; 28-aug-2015 fixed decimal adc/sbc immediate only testing carry
; 09-feb-2017 fixed RMB/SMB tested when they shouldn't be tested
; 04-dec-2017 fixed BRK not tested for actually going through the IRQ vector
; added option to skip the remainder of a failing test
; in report.i65
; added skip override to undefined opcode as NOP test
; 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
0001 = 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
0001 = 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.
0003 = I_flag = 3
;configure memory - try to stay away from memory used by the system
;zero_page memory start address, $4e (78) consecutive Bytes required
; add 2 if I_flag = 2
000a = zero_page = $a
;data_segment memory start address, $63 (99) consecutive Bytes required
; + 12 Bytes at data_segment + $f9 (JMP indirect page cross test)
0200 = 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, 10kB of consecutive space required
; add 1 kB if I_flag = 2
0400 = code_segment = $400
;added WDC only opcodes WAI & STP (0=test as NOPs, >0=no test)
0001 = wdc_op = 1
;added Rockwell & WDC opcodes BBR, BBS, RMB & SMB
;(0=test as NOPs, 1=full test, >1=no test)
0001 = rkwl_wdc_op = 1
;skip testing all undefined opcodes override
;0=test as NOP, >0=skip
0000 = skip_nop = 0
;report errors through I/O channel (0=use standard self trap loops, 1=include
;report.i65 as I/O channel, add 3 kB)
0000 = 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
ffff = ram_top = -1
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
db $db
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
0001 = carry equ %00000001 ;flag bits in status
0002 = zero equ %00000010
0004 = intdis equ %00000100
0008 = decmode equ %00001000
0010 = break equ %00010000
0020 = reserv equ %00100000
0040 = overfl equ %01000000
0080 = minus equ %10000000
0001 = fc equ carry
0002 = fz equ zero
0003 = fzc equ carry+zero
0040 = fv equ overfl
0042 = fvz equ overfl+zero
0080 = fn equ minus
0081 = fnc equ minus+carry
0082 = fnz equ minus+zero
0083 = fnzc equ minus+zero+carry
00c0 = fnv equ minus+overfl
0030 = fao equ break+reserv ;bits always on after PHP, BRK
0034 = fai equ fao+intdis ;+ forced interrupt disable
00ff = m8 equ $ff ;8 bit mask
00fb = m8i equ $ff&~intdis ;8 bit mask - interrupt disable
;macros to allow masking of status bits.
;masking of interrupt enable/disable on load and compare
;masking of always on bits after PHP or BRK (unused & break) on compare
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
;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_as macro ;testing result in accu & flags, save accu
pha
php ;save flags
cmp #\1 ;test result
trap_ne
pla ;load status
pha
cmp_flag \2
trap_ne
plp ;restore status
pla
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
ldx #11 ;reset modifiable RAM
ccs1\? sta jxi_tab,x ;JMP indirect page cross area
dex
bpl ccs1\?
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
000a = org zero_page
;break test interrupt save
000a : 00 irq_a ds 1 ;a register
000b : 00 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
000c : zpt ;5 bytes store/modify test area
;add/subtract operand generation and result/flag prediction
000c : 00 adfc ds 1 ;carry flag before op
000d : 00 ad1 ds 1 ;operand 1 - accumulator
000e : 00 ad2 ds 1 ;operand 2 - memory / immediate
000f : 00 adrl ds 1 ;expected result bits 0-7
0010 : 00 adrh ds 1 ;expected result bit 8 (carry)
0011 : 00 adrf ds 1 ;expected flags NV0000ZC (-V in decimal mode)
0012 : 00 sb2 ds 1 ;operand 2 complemented for subtract
0013 : zp_bss
0013 : c3824100 zp1 db $c3,$82,$41,0 ;test patterns for LDx BIT ROL ROR ASL LSR
0017 : 7f zp7f db $7f ;test pattern for compare
;logical zeropage operands
0018 : 001f7180 zpOR db 0,$1f,$71,$80 ;test pattern for OR
001c : 0fff7f80 zpAN db $0f,$ff,$7f,$80 ;test pattern for AND
0020 : ff0f8f8f zpEO db $ff,$0f,$8f,$8f ;test pattern for EOR
;indirect addressing pointers
0024 : 1002 ind1 dw abs1 ;indirect pointer to pattern in absolute memory
0026 : 1102 dw abs1+1
0028 : 1202 dw abs1+2
002a : 1302 dw abs1+3
002c : 1402 dw abs7f
002e : 1801 inw1 dw abs1-$f8 ;indirect pointer for wrap-test pattern
0030 : 0502 indt dw abst ;indirect pointer to store area in absolute memory
0032 : 0602 dw abst+1
0034 : 0702 dw abst+2
0036 : 0802 dw abst+3
0038 : 0d01 inwt dw abst-$f8 ;indirect pointer for wrap-test store
003a : 4702 indAN dw absAN ;indirect pointer to AND pattern in absolute memory
003c : 4802 dw absAN+1
003e : 4902 dw absAN+2
0040 : 4a02 dw absAN+3
0042 : 4b02 indEO dw absEO ;indirect pointer to EOR pattern in absolute memory
0044 : 4c02 dw absEO+1
0046 : 4d02 dw absEO+2
0048 : 4e02 dw absEO+3
004a : 4302 indOR dw absOR ;indirect pointer to OR pattern in absolute memory
004c : 4402 dw absOR+1
004e : 4502 dw absOR+2
0050 : 4602 dw absOR+3
;add/subtract indirect pointers
0052 : 0502 adi2 dw ada2 ;indirect pointer to operand 2 in absolute memory
0054 : 0602 sbi2 dw sba2 ;indirect pointer to complemented operand 2 (SBC)
0056 : 0601 adiy2 dw ada2-$ff ;with offset for indirect indexed
0058 : 0701 sbiy2 dw sba2-$ff
005a : zp_bss_end
0200 = org data_segment
0200 : 0000 pg_x ds 2 ;high JMP indirect address for page cross bug
0202 : 00 test_case ds 1 ;current test number
0203 : 0000 ram_chksm ds 2 ;checksum for RAM integrity test
;add/subtract operand copy - abs tests write area
0205 : abst ;5 bytes store/modify test area
0205 : 00 ada2 ds 1 ;operand 2
0206 : 00 sba2 ds 1 ;operand 2 complemented for subtract
0207 : 000000 ds 3 ;fill remaining bytes
020a : data_bss
if load_data_direct = 1
020a : 6900 ex_adci adc #0 ;execute immediate opcodes
020c : 60 rts
020d : e900 ex_sbci sbc #0 ;execute immediate opcodes
020f : 60 rts
else
ex_adci ds 3
ex_sbci ds 3
endif
0210 : c3824100 abs1 db $c3,$82,$41,0 ;test patterns for LDx BIT ROL ROR ASL LSR
0214 : 7f abs7f db $7f ;test pattern for compare
;loads
0215 : 80800002 fLDx db fn,fn,0,fz ;expected flags for load
;shifts
0219 : rASL ;expected result ASL & ROL -carry
0219 : 86048200 rROL db $86,$04,$82,0 ; "
021d : 87058301 rROLc db $87,$05,$83,1 ;expected result ROL +carry
0221 : rLSR ;expected result LSR & ROR -carry
0221 : 61412000 rROR db $61,$41,$20,0 ; "
0225 : e1c1a080 rRORc db $e1,$c1,$a0,$80 ;expected result ROR +carry
0229 : fASL ;expected flags for shifts
0229 : 81018002 fROL db fnc,fc,fn,fz ;no carry in
022d : 81018000 fROLc db fnc,fc,fn,0 ;carry in
0231 : fLSR
0231 : 01000102 fROR db fc,0,fc,fz ;no carry in
0235 : 81808180 fRORc db fnc,fn,fnc,fn ;carry in
;increments (decrements)
0239 : 7f80ff0001 rINC db $7f,$80,$ff,0,1 ;expected result for INC/DEC
023e : 0080800200 fINC db 0,fn,fn,fz,0 ;expected flags for INC/DEC
;logical memory operand
0243 : 001f7180 absOR db 0,$1f,$71,$80 ;test pattern for OR
0247 : 0fff7f80 absAN db $0f,$ff,$7f,$80 ;test pattern for AND
024b : ff0f8f8f absEO db $ff,$0f,$8f,$8f ;test pattern for EOR
;logical accu operand
024f : 00f11f00 absORa db 0,$f1,$1f,0 ;test pattern for OR
0253 : f0ffffff absANa db $f0,$ff,$ff,$ff ;test pattern for AND
0257 : fff0f00f absEOa db $ff,$f0,$f0,$0f ;test pattern for EOR
;logical results
025b : 00ff7f80 absrlo db 0,$ff,$7f,$80
025f : 02800080 absflo db fz,fn,0,fn
0263 : data_bss_end
;define area for page crossing JMP (abs) & JMP (abs,x) test
02f9 = jxi_tab equ data_segment + $100 - 7 ;JMP (jxi_tab,x) x=6
02fd = ji_tab equ data_segment + $100 - 3 ;JMP (ji_tab+2)
0300 = jxp_tab equ data_segment + $100 ;JMP (jxp_tab-255) x=255
code
0400 = org code_segment
0400 : d8 start cld
0401 : a2ff ldx #$ff
0403 : 9a txs
0404 : a900 lda #0 ;*** test 0 = initialize
0406 : 8d0202 sta test_case
0000 = 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
;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
ldx #11 ;reset modifiable RAM
gcs1 sta jxi_tab,x ;JMP indirect page cross area
dex
bpl gcs1
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
0409 : ad0202 > lda test_case ;previous test
040c : c900 > cmp #test_num
> trap_ne ;test is out of sequence
040e : d0fe > bne * ;failed not equal (non zero)
>
0001 = >test_num = test_num + 1
0410 : a901 > lda #test_num ;*** next tests' number
0412 : 8d0202 > sta test_case
> ;check_ram ;uncomment to find altered RAM after each test
;testing stack operations PHX PHY PLX PLY
0415 : a999 lda #$99 ;protect a
0417 : a2ff ldx #$ff ;initialize stack
0419 : 9a txs
041a : a255 ldx #$55
041c : da phx
041d : a2aa ldx #$aa
041f : da phx
0420 : ecfe01 cpx $1fe ;on stack ?
trap_ne
0423 : d0fe > bne * ;failed not equal (non zero)
0425 : ba tsx
0426 : e0fd cpx #$fd ;sp decremented?
trap_ne
0428 : d0fe > bne * ;failed not equal (non zero)
042a : 7a ply
042b : c0aa cpy #$aa ;successful retreived from stack?
trap_ne
042d : d0fe > bne * ;failed not equal (non zero)
042f : 7a ply
0430 : c055 cpy #$55
trap_ne
0432 : d0fe > bne * ;failed not equal (non zero)
0434 : ccff01 cpy $1ff ;remains on stack?
trap_ne
0437 : d0fe > bne * ;failed not equal (non zero)
0439 : ba tsx
043a : e0ff cpx #$ff ;sp incremented?
trap_ne
043c : d0fe > bne * ;failed not equal (non zero)
043e : a0a5 ldy #$a5
0440 : 5a phy
0441 : a05a ldy #$5a
0443 : 5a phy
0444 : ccfe01 cpy $1fe ;on stack ?
trap_ne
0447 : d0fe > bne * ;failed not equal (non zero)
0449 : ba tsx
044a : e0fd cpx #$fd ;sp decremented?
trap_ne
044c : d0fe > bne * ;failed not equal (non zero)
044e : fa plx
044f : e05a cpx #$5a ;successful retreived from stack?
trap_ne
0451 : d0fe > bne * ;failed not equal (non zero)
0453 : fa plx
0454 : e0a5 cpx #$a5
trap_ne
0456 : d0fe > bne * ;failed not equal (non zero)
0458 : ecff01 cpx $1ff ;remains on stack?
trap_ne
045b : d0fe > bne * ;failed not equal (non zero)
045d : ba tsx
045e : e0ff cpx #$ff ;sp incremented?
trap_ne
0460 : d0fe > bne * ;failed not equal (non zero)
0462 : c999 cmp #$99 ;unchanged?
trap_ne
0464 : d0fe > bne * ;failed not equal (non zero)
next_test
0466 : ad0202 > lda test_case ;previous test
0469 : c901 > cmp #test_num
> trap_ne ;test is out of sequence
046b : d0fe > bne * ;failed not equal (non zero)
>
0002 = >test_num = test_num + 1
046d : a902 > lda #test_num ;*** next tests' number
046f : 8d0202 > sta test_case
> ;check_ram ;uncomment to find altered RAM after each test
; test PHX does not alter flags or X but PLX does
0472 : a0aa ldy #$aa ;protect y
set_x 1,$ff ;push
> load_flag $ff
0474 : a9ff > lda #$ff ;allow test to change I-flag (no mask)
>
0476 : 48 > pha ;use stack to load status
0477 : a201 > ldx #1 ;precharge index x
0479 : 28 > plp
047a : da phx
tst_x 1,$ff
047b : 08 > php ;save flags
047c : e001 > cpx #1 ;test result
> trap_ne
047e : d0fe > bne * ;failed not equal (non zero)
>
0480 : 68 > pla ;load status
0481 : 48 > pha
> cmp_flag $ff
0482 : c9ff > cmp #($ff|fao)&m8 ;expected flags + always on bits
>
> trap_ne
0484 : d0fe > bne * ;failed not equal (non zero)
>
0486 : 28 > plp ;restore status
set_x 0,0
> load_flag 0
0487 : a900 > lda #0 ;allow test to change I-flag (no mask)
>
0489 : 48 > pha ;use stack to load status
048a : a200 > ldx #0 ;precharge index x
048c : 28 > plp
048d : da phx
tst_x 0,0
048e : 08 > php ;save flags
048f : e000 > cpx #0 ;test result
> trap_ne
0491 : d0fe > bne * ;failed not equal (non zero)
>
0493 : 68 > pla ;load status
0494 : 48 > pha
> cmp_flag 0
0495 : c930 > cmp #(0|fao)&m8 ;expected flags + always on bits
>
> trap_ne
0497 : d0fe > bne * ;failed not equal (non zero)
>
0499 : 28 > plp ;restore status
set_x $ff,$ff
> load_flag $ff
049a : a9ff > lda #$ff ;allow test to change I-flag (no mask)
>
049c : 48 > pha ;use stack to load status
049d : a2ff > ldx #$ff ;precharge index x
049f : 28 > plp
04a0 : da phx
tst_x $ff,$ff
04a1 : 08 > php ;save flags
04a2 : e0ff > cpx #$ff ;test result
> trap_ne
04a4 : d0fe > bne * ;failed not equal (non zero)
>
04a6 : 68 > pla ;load status
04a7 : 48 > pha
> cmp_flag $ff
04a8 : c9ff > cmp #($ff|fao)&m8 ;expected flags + always on bits
>
> trap_ne
04aa : d0fe > bne * ;failed not equal (non zero)
>
04ac : 28 > plp ;restore status
set_x 1,0
> load_flag 0
04ad : a900 > lda #0 ;allow test to change I-flag (no mask)
>
04af : 48 > pha ;use stack to load status
04b0 : a201 > ldx #1 ;precharge index x
04b2 : 28 > plp
04b3 : da phx
tst_x 1,0
04b4 : 08 > php ;save flags
04b5 : e001 > cpx #1 ;test result
> trap_ne
04b7 : d0fe > bne * ;failed not equal (non zero)
>
04b9 : 68 > pla ;load status
04ba : 48 > pha
> cmp_flag 0
04bb : c930 > cmp #(0|fao)&m8 ;expected flags + always on bits
>
> trap_ne
04bd : d0fe > bne * ;failed not equal (non zero)
>
04bf : 28 > plp ;restore status
set_x 0,$ff
> load_flag $ff
04c0 : a9ff > lda #$ff ;allow test to change I-flag (no mask)
>
04c2 : 48 > pha ;use stack to load status
04c3 : a200 > ldx #0 ;precharge index x
04c5 : 28 > plp
04c6 : da phx
tst_x 0,$ff
04c7 : 08 > php ;save flags
04c8 : e000 > cpx #0 ;test result
> trap_ne
04ca : d0fe > bne * ;failed not equal (non zero)
>
04cc : 68 > pla ;load status
04cd : 48 > pha
> cmp_flag $ff
04ce : c9ff > cmp #($ff|fao)&m8 ;expected flags + always on bits
>
> trap_ne
04d0 : d0fe > bne * ;failed not equal (non zero)
>
04d2 : 28 > plp ;restore status
set_x $ff,0
> load_flag 0
04d3 : a900 > lda #0 ;allow test to change I-flag (no mask)
>
04d5 : 48 > pha ;use stack to load status
04d6 : a2ff > ldx #$ff ;precharge index x
04d8 : 28 > plp
04d9 : da phx
tst_x $ff,0
04da : 08 > php ;save flags
04db : e0ff > cpx #$ff ;test result
> trap_ne
04dd : d0fe > bne * ;failed not equal (non zero)
>