sxsim rtcc skip count
Peter Verkaik
Posts: 3,956
Hi,
The attached program simply increments a 32bit timer in the interrupt.
I noticed that in SxSim 2.08.05 that on a snz instruction with Z=0
that rtcc increments by 3. Datasheet says a skip takes 2 cycles.
SxSim bug?
regards peter
The attached program simply increments a 32bit timer in the interrupt.
I noticed that in SxSim 2.08.05 that on a snz instruction with Z=0
that rtcc increments by 3. Datasheet says a skip takes 2 cycles.
device SX48,OSCHS2
freq 25000000
reset _reset
org $30
dvpTimer1 ds 1
dvpTimer2 ds 1
dvpTimer3 ds 1
dvpTimer4 ds 1
;first isr run should take 4([url=mailto:jmp@)+3(call)+10(sub)+1(mov]jmp@)+3(call)+10(sub)+1(mov[/url] w)+3(retiw) = 21 cycles
;first run
ORG $000
jmp @dvpTMR_vector ; 4 4
_reset
mov fsr,#dvpTimer1
clr ind
mov w,#$88
mov !option,w
mov w,#$F8
mov rtcc,w
jmp $
dvpTMR_vector
call dvpTMR_S0 ; 3 3
mov w,#(-217)&255 ; 1 1
retiw ; 3 3
dvpTMR_S0
inc dvpTimer1 ; 1 1
snz ; 1/2 2 (NZ)
inc dvpTimer2 ; 1
snz ; 1/2 2
inc dvpTimer3 ; 1
snz ; 1/2 2
inc dvpTimer4 ; 1
retp ; 3 3
SxSim bug?
regards peter
Comments
Problem solved.
Apparently the latest IDE v3.2.92h beta installs sxsim v2.08.05
regards peter
sorry for the mess-up...
The SX-Key IDE not always auto-installs the most recent version of SXSim. This is because Peter and I sometimes run out of sync when releasing new versions. So, the best idea is to always check if there is a newer version of SXSim available in the "sticky" SXSim post in this forum section after you have installed a new version of the IDE.
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Greetings from Germany,
G