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 Post subject: Timex/Sinclar
PostPosted: Tue Sep 07, 2010 1:09 pm 

Joined: Fri Jul 14, 2006 1:27 pm
Posts: 50
Hello,I have a Timex/Sinclar "laptop" computer.In original box ,power supply,and manuals.Anyone interested or collecting these oldies?Offers?


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 Post subject: Re: Timex/Sinclar
PostPosted: Fri Sep 17, 2010 3:39 am 
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Joined: Fri Feb 08, 2002 1:01 am
Posts: 4250
Location: USA / North Carolina / Fayetteville
i had one of them timex sinclair 2000 when i was a kid.. they seemed to have a software all their own. i kinda hated it, because the PS was too weak for the darn thing. you spend over 1-2 hrs playing with it, and then it died on you , and then restarted..lol
what language did that thing use anyway ? had a lot of weird symbles etc.


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 Post subject: Re: Timex/Sinclar
PostPosted: Mon Nov 22, 2010 8:40 pm 

Joined: Mon Sep 25, 2006 9:06 am
Posts: 11
dacflyer wrote:
i had one of them timex sinclair 2000 when i was a kid.. they seemed to have a software all their own. i kinda hated it, because the PS was too weak for the darn thing. you spend over 1-2 hrs playing with it, and then it died on you , and then restarted..lol
what language did that thing use anyway ? had a lot of weird symbles etc.

Hi
I built a few from a kit and they ran a version of basic that used keywords for the basic functions, you could either type the command words or use a shortcut that used less memory.

bob


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 Post subject: Re: Timex/Sinclar
PostPosted: Tue Nov 23, 2010 4:43 am 
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Joined: Fri Feb 08, 2002 1:01 am
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Location: USA / North Carolina / Fayetteville
but what about the symbols they used to use. thats was i was curious about.. i know it was not basic..lol


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 Post subject: Re: Timex/Sinclar
PostPosted: Mon Dec 06, 2010 9:53 am 

Joined: Mon Sep 25, 2006 9:06 am
Posts: 11
dacflyer wrote:
but what about the symbols they used to use. thats was i was curious about.. i know it was not basic..lol

the extra symbols were sinclair's version of ascii they added a lot of little custom symbols for the unprintable code. ascii has been around a long time some codes were "bel" 07 hex rang a bell on the teletype but it was not printed. When computers came around programmers started adding graphics in the spaces of code that was no longer used.


bob


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 Post subject: Re: Timex/Sinclar
PostPosted: Mon Dec 06, 2010 8:17 pm 
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Joined: Fri Feb 08, 2002 1:01 am
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Location: USA / North Carolina / Fayetteville
cool. thanks for the info :)


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 Post subject: Re: Timex/Sinclar
PostPosted: Sun Dec 19, 2010 8:06 am 
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Joined: Fri Jan 11, 2002 1:01 am
Posts: 3826
Location: NewJersey
Hi,

I didnt even see this thread until now (Dec 19th). I liked the Timex quite a bit when it first came out.

The program rom was all done in assembly, and believe it or not, i have a complete program dump of the entire ROM complete with notes as to what that section of the asc code did for the computer (ie routines all have human descriptions not just address locations). It shows how each part of the code was done and what it does. Basically, everything was done with an interrupt with various parameters pushed onto the stack such as arithmetic arguments and stuff like that. Different operations had different interrupt service routines. Pretty cool really. For example, they used Chebychev polynomials to generate the trig functions rather than Taylor, because of the better error distribution.
The disassembly was done by Dr. Ian Logan and Dr. Frank O'Hara.

I always though about how cool it would be to translate that ROM into something that could be used on the PC, to emulate the Sinclair, but it would be a lot of work.



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 Post subject: Re: Timex/Sinclar
PostPosted: Sun Dec 19, 2010 8:07 am 
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Joined: Fri Jan 11, 2002 1:01 am
Posts: 3826
Location: NewJersey
MrAl wrote:
Hi,

I didnt even see this thread until now (Dec 19th). I liked the Timex quite a bit when it first came out.

The program ROM was all done in assembly, and believe it or not, i have a complete program dump of the entire ROM complete with notes as to what that section of the asc code did for the computer (ie routines all have human descriptions not just address locations). It shows how each part of the code was done and what it does. Basically, everything was done with an interrupt with various parameters pushed onto the stack such as arithmetic arguments and stuff like that. Different operations had different interrupt service routines. Pretty cool really. For example, they used Chebychev polynomials to generate the trig functions rather than Taylor, because of the better error distribution.
The disassembly was done by Dr. Ian Logan and Dr. Frank O'Hara.

I always though about how cool it would be to translate that ROM into something that could be used on the PC, to emulate the Sinclair, but it would be a lot of work.



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 Post subject: Re: Timex/Sinclar
PostPosted: Sun Jan 30, 2011 10:20 am 
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Joined: Fri Feb 08, 2002 1:01 am
Posts: 4250
Location: USA / North Carolina / Fayetteville
mine used to drive me crazy.. it would crash 1/2 way thru program loading.. poor power supply..


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