RE: A92: Questions about some instructions
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RE: A92: Questions about some instructions
Woof! finally some good programming questions....
>-----Original Message-----
>From: owner-assembly-92@lists.ticalc.org
>[mailto:owner-assembly-92@lists.ticalc.org]On Behalf Of Alexander
>Grutsch
>Sent: Saturday, June 06, 1998 3:47 AM
>To: assembly-92@lists.ticalc.org
>Subject: A92: Questions about some instructions
>
>
>
>I've got some questions about the ASM-68:
It's called the 68000 or the 68k. ASM-68 sounds like ASM86 for a minute there
>
>What are the following branches:
>
> bmi, bvs?
BMI comes after a tst command. If you test "TST #-2", then you put "BMI DOG", the prog will jump to DOG if -2 equals to negative
[which in this case, is the case]
BVS is when the result can't be calculated, aka overflow. [How can that happen? Anyone wanna explain?]
>
>What is the "ccr" register?
This is the part of the Status Register. You can check if the last answer was negative, positive, zero, etc. thru the CCR Register.
This can be readable by a user type program.
>What is the "seq" instruction?
Dunno
>
>Thanks
>
>--
>MXM-TriX
>http://members.vol.at/schoenach
>alexander.grutsch.htlr@schulen.vol.at
>
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