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Re: Command line parsing and MACRO-20

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jayjwa <jayjwa@atr2.ath.cx.invalid> writes:

 [ snip ]

> Yes, and if they don't work it leaves a novice debugging expert's code
> with no idea what's going wrong. This happened in the Longo text with
> the Chapter 11 macros for interrupt handling. 2/3 of the examples won't
> assemble. Why? I don't know. It could be a difference in TOPS-20
> versions, MACRO-20 versions, a printing error, a user copy error, a case
> error (it's case-insensitive until it's not) or really anything. Here's
> the last program (ex 5) without relying on those macros.

Does this version of the program work without those macros?  Just curious, but
no enough so to copy and assemble it for myself.

 [ snip ]

> ; Elapsed time handler for channel 0, key-in. The first time this is
> ; called 'strtim' will be zero, indicating to save the begin time. When
> ; it's not zero, and called again, this indicates to save the end time. 
> 	subttl	Timer handler
> etimer: move	t1, strtim			; Check if strtim is 0
> 	skipn	t1		
> 	  jrst	[time%				; Yes, get start time
> 		 movem	t1, strtim		; And stash for later
> 		 jrst	exthdl]			; Exit handler
> 	time%					; Second time here
> 	movem	t1, endtim			; Get, save end time

 [ snip ]

Why are you moving the value of strtim into an AC?  The SKIP instructions take
an effective address, so unless you need the initial value of strtim for
something, you only need

        SKIPN STRTIM

If you want to check it, AND save the value, use

        SKIPN T1,STRTIM

>> You keep wanting TOPS-20 to be Unix.  It isn't.

> Not really. I referenced C argc/argv because everyone knows that and I
> didn't know how else to get my point across simply and direct. 

You're lucky that I happen to know those terms from a C programming book I read
in the 1980s.  I have no idea how to use them, because I am not a C programmer
and have no need to know.

-- 
Rich Alderson					  news@alderson.users.panix.com
      Audendum est, et veritas investiganda; quam etiamsi non assequamur,
	  omnino tamen proprius, quam nunc sumus, ad eam perveniemus.
									--Galen

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Command line parsing and MACRO-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-08-28 14:08 -0400
  Re: Command line parsing and MACRO-20 scott@slp53.sl.home (Scott Lurndal) - 2026-08-28 18:35 +0000
    Re: Command line parsing and MACRO-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-08-29 12:19 -0400
      Re: Command line parsing and MACRO-20 Rich Alderson <news@alderson.users.panix.com> - 2026-08-29 17:51 -0400
  Re: Command line parsing and MACRO-20 Rich Alderson <news@alderson.users.panix.com> - 2026-08-28 20:59 -0400
    Re: Command line parsing and MACRO-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-08-29 12:37 -0400
      Re: Command line parsing and MACRO-20 Rich Alderson <news@alderson.users.panix.com> - 2026-08-29 18:04 -0400
        Re: Command line parsing and MACRO-20 jayjwa <jayjwa@atr2.ath.cx.invalid> - 2026-08-30 11:38 -0400
          Re: Command line parsing and MACRO-20 Rich Alderson <news@alderson.users.panix.com> - 2026-08-30 22:18 -0400

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