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pro_vb thread: ZX81 was SV: RE: Memory Leaks & Object termination


Message #1 by "aake forsmark" <aake.forsmark@s...> on Wed, 25 Apr 2001 12:26:07 +0200
I'm happy for this thread to continue, but can we move it onto the 
VB_discuss@p... list? Pro_vb gets a fair bit of traffic.

FWIW, I can go one better and say that the first Micro I ever coded on was 
an R2E Micral, where you had to load the BASIC interpreter from a BASF audio 
tape. In fact, my first programming was in an educational language known as 
CESIL, on a Sperry Univac mainframe. This meant writing code on pink 80-
column paper cards. When the program threw a syntax error, you got the 
cards sent back to you with a rubber band round them and the offending card burried nine-edge-down with the error number written on
the back in biro. Them were the days.

Like I say, VB_Discuss is an acceptable place for this thread now ;-).

Daniel Walker
Wrox Press

> Sorry but every time I think of the ZX81 I grin.
> Can anyone remember pressing the keyboard to hard so that the 16k ram pack
> would cause the machine to crash.
> Great old days.
> My first prog wasn't as advanced I was only 11 and it was an animation of a
> dog having a crap. Made to annoy my mother which unfortunately may say a lot
> about myself.
> 
> 
> -----Original Message-----
> From: aake forsmark [mailto:aake.forsmark@s...]
> Sent: 25 April 2001 11:26
> To: professional vb
> Subject: [pro_vb] ZX81 was SV: RE: Memory Leaks & Object termination
> 
> 
>  > PS.
>  > My code is probably terrible as I am a jack of all trades
>  > and been doing
>  > this since 79 (ZX81 and I was 11 so I ain't that old) but I
>  > have a lot of
>  > old and bad habits.
>  > One thing I keep meaning to do is provide a web site that
>  > goes through the
>  > whole development process of an application. I would like to
>  > do this in
>  > collaboration with others and document the whole complete
>  > thing arguments
>  > the lot. Does this idea interest anyone?
>  >
> 
> Now we are talking! ZX81 was a great machine! A whole
> 1024 bytes of memory (including the graphic memory)
> 
> I remember that I tried to make a program that I
> thougt of as 'TV backwards', the program was supposed
> to scan a virtual room in which objects where placed.
> I used some vector math and I hade severe problems to
> fill it in the memory (I had expanded it to 16k)
> 
> It was 15 years later I understood that I had made
> a ray tracer! For once in my life I actually was
> before my time (well, it could only show black or white
> so it was somewhat limited)
> 
> There is some nice emulators around so one can
> try the ZX81 ...
> 
> aake
> 
> 
> 

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