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sbc

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folkert van heusden 2022-03-13 18:28:58 +01:00
parent 337bbc836d
commit aefcf2f5f7
2 changed files with 63 additions and 2 deletions
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63
tester-adc-sbc.mac
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@ -10,11 +10,15 @@ test_adc_loop:
ADD #1003.,R0
ADC R0
MFPS R2
BIC #65520.,R2
ADD R2,R0
DEC R1
TST R1
BNE test_adc_loop
CMP #28400.,R0
CMP #29424.,R0
BNE test_adc_failed
; test 8 bit
@ -25,11 +29,15 @@ test_adc_loop8b:
ADD #13.,R0
ADCB R0
MFPS R2
BIC #65520.,R2
ADD R2,R0
DEC R1
TST R1
BNE test_adc_loop8b
CMP #36110.,R0
CMP #36878.,R0
BNE test_adc_failed
RET
@ -42,3 +50,54 @@ test_adc_failed:
adc_fail_text:
.ASCII "ADC handling FAIL\r\n\x00"
.EVEN
test_sbc:
; initial value
MOV #32769.,R0
; number of additions
MOV #257.,R1
test_sbc_loop:
SUB #1003.,R0
SBC R0
MFPS R2
BIC #65520.,R2
SUB R2,R0
DEC R1
TST R1
BNE test_sbc_loop
CMP #36106.,R0
BNE test_sbc_failed
; test 8 bit
MOV #32769.,R0
MOV #257.,R1
test_sbc_loop8b:
SUB #13.,R0
SBCB R0
MFPS R2
BIC #65520.,R2
SUB R2,R0
DEC R1
TST R1
BNE test_sbc_loop8b
CMP #28652.,R0
BNE test_sbc_failed
RET
test_sbc_failed:
MOV #sbc_fail_text,R0
CALL print_start
RET
sbc_fail_text:
.ASCII "SBC handling FAIL\r\n\x00"
.EVEN

2
tester.mac
View file

@ -22,6 +22,8 @@ go: MOV #textstart, R0
CALL test_adc
CALL test_sbc
MOV #textfin, R0
CALL print_start
TRAP 7