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!Forthmacs.extend.arm.runtimer
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1996-06-06
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1KB
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47 lines
\ cpu-specific part for the runtimer
only forth also definitions decimal
10000 constant usec/tick \ 100hz tickerV
variable ticker
code interrupt-code
r0 sp push
r0 'body ticker pcr ldr
r0 1 incr
r0 'body ticker pcr str
r0 sp pop
pc lk s mov end-code
\ install ticker in the TICKERV
code install-ticker
r0 h# 1c # mov \ vector-id for tickerV
r1 'body interrupt-code adr
r2 0 # mov
h# 47 swix c; install-ticker
\ remove-ticker stops ticker and removes the rma
code remove-ticker
r0 h# 1c # mov \ id for tickerV
r1 'body interrupt-code adr
r2 0 # mov
h# 20 swix c; \ release tickerV
code time) \ (r ret_to data #time -- ) points to the following code
here /token + token,
r1 r2 ip 3 rp ia! ldm \ r1:#time, r2:next-ip
r0 'body ticker pcr ldr
r0 r0 r1 sub \ r0:used time
r3 r4 2 r2 db! ldm \ r3:calls r4:time
r3 1 incr
r4 r4 r0 add
r3 r4 2 r2 ia! stm c;
code (time \ (r ret_to -- ret_to next-ip #time 'timer> )
r1 'body ticker pcr ldr
r0 'body time) adr
ip 2 cells incr
r0 r1 ip 3 rp db! stm c;
only forth also definitions