6502/6502_65C02_functional_tests
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minor improvement to relative address test

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added landing zones for branches with erroneous offset while branches
are under test. fixed typo in readme.
This commit is contained in:
Klaus2m5 2014-12-14 14:28:37 +01:00
parent ddb0855216
commit 22498d2485
2 changed files with 34 additions and 3 deletions
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35
6502_functional_test.a65
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@ -21,7 +21,7 @@
; addressing modes with focus on propper setting of the processor status
; register bits.
;
; version 16-aug-2013
; version 14-dec-2014
; contact info at http://2m5.de or email K@2m5.de
;
; assembled with AS65 from http://www.kingswood-consulting.co.uk/assemblers/
@ -68,6 +68,7 @@
; 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
; C O N F I G U R A T I O N
@ -741,12 +742,27 @@ range_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
@ -876,7 +892,7 @@ range_fw
dex ;-3
range_op ;test target with zero flag=0, z=1 if previous dex
range_adr = *+1 ;modifiable relative address
beq *+64 ;if called without modification
beq *+64 ;+64 if called without modification
dex ;+0
dex
dex
@ -1004,9 +1020,24 @@ range_adr = *+1 ;modifiable relative address
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

2
readme.txt
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@ -1,6 +1,6 @@
This is a set of functional tests for the 6502/65C02 type processors.
The 6502_functionel_test.a65 is an assembler sourcecode to test all valid
The 6502_functional_test.a65 is an assembler sourcecode to test all valid
opcodes and addressing modes of the original NMOS 6502 cpu.
The 65C02_extended_opcodes_test.a65c tests all additional opcodes of the