NetNews Usenet Archive 1993 #1/NN_1993_1.iso/spool/comp/sys/amiga/programm/18301

Text File | 1993-01-07 | 1.6 KB | 36 lines

Newsgroups: comp.sys.amiga.programmer
Path: sparky!uunet!gatech!news.byu.edu!ux1!fcom.cc.utah.edu!val
From: [e-mail] (Val Kartchner)
Subject: 680x0 Branch Instructions?
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Organization: University of Utah Computer Center
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Date: Thu, 7 Jan 93 18:44:45 GMT
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I program in 680x0 assembly language from time to time.  I will soon be
programming some routines in assembly language again soon.  I need help
on the meaning and practical usage of the less common branch instructions.
I know what the eight common ones do.  (BRA, BSB, BLS, BLE, BEQ, BNE, BGE,
BGT)  I think that four of the others are used for branches based on
unsigned compares, but I'm not sure which ones.  (BCS, BCC, BPL, BMI?)
What practical use are the other four branch instructions?

Would an assembly guru be willing to confirm this usage and/or correct it
as well as provide practical examples (short) of using all of the branch
instructions? (C-like pseudo-code is prefered, but Pascal-like would be
fine.)

            Thanks in advance,
                -=:[ VAL ]:=-

P.S.: I can figure it out (as I usually do), but I would like confirmation.

P.P.S.: I probably got several of the mneumonics wrong.  Please correct.
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