Subject:
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Re: Help in Assembler
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 6 Nov 1997 04:10:52 GMT
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Original-From:
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Brian S Jappinen <jappinen@cs.umt.STOPSPAMMERSedu>
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Viewed:
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1273 times
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> From mar@cooper.edu Wed Nov 5 18:33:16 1997
> Consider a part of a program:
>
> var1 FCB 1
> var2 FCB 7
> var3 FCB 4
> .
> .
> .
> varN FCB ?
>
> If I want to use a variable (say X) to determine when to use "var1" to
> "varN", how can I do this (other than a whole bunch of CMP's).
> (i.e. when X = 3, I want to access var3)
>
> I guess what I'm asking is...Is there a way to indicate the address var3
> as "the address of var1 plus an offset"?
I think this might be what you want to do:
varind FCB $00 * 0 <= varind <= FF
ORG $c100 * some location of table
var1 FCB 1
var2 FCB 7
var3 FCB 4
.
.
.
varN FCB ?
.
.
tabadr FDB #$c100 * address where table is stored
start ORG $c000
LDX tabadr
.
.
.
INC num
.
.
LDAA num,x
Note: 0,x would access the first element of the table.
You might think about a hash table.
Scott
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Message has 1 Reply:
 | | Re: Help in Assembler
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| What is "ORG"? Does it matter what number you use? Is the number a memory location? Thanks for any help! :) ---...--- ericson mar Master of Engineering Candidate Project: Mobile Robotics mar@cooper.edu (212)353-4356 Department of Mechanical (...) (27 years ago, 7-Nov-97, to lugnet.robotics.handyboard)
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