[vcf-midatlantic] Working Tandy 1000 or 2000

[Kelly Leavitt]

I have manyof the 1000 series computers (hx, ex, sx, sl, sl2, tl, etc). Do you know which used the wonky TI chip? I can always start opening them up.


________________________________
From: Jonathan Gevaryahu <jgevaryahu at gmail.com>
Sent: Wednesday, August 29, 2018 12:55 AM
To: Kelly Leavitt; vcf-midatlantic
Subject: Re: [vcf-midatlantic] Working Tandy 1000 or 2000

Another thing: I need to test against a tandy 1000-series with an NCR8496 or PSSJ-1 asic in it, i.e. not the original tandy 1000/1000a/1000hd, since they actually use a real TI SN76496 PSG which actually behaves differently! (that's the whole reason I need to do these tests, the behavior isn't consistent!)


On 8/29/2018 12:53 AM, Jonathan Gevaryahu wrote:
Indeed, I was thinking of the 1000 series, not the 2000.
I'm trying to figure the best way to run the tests from basic, i might need to mess around with dosbox to get the program written, since MAME has keyboard issues with the tandy machines (which I'd also love to fix...)



On 8/28/2018 8:45 PM, Kelly Leavitt wrote:

The 2000 and the 1000 were remarkably different beasts. The 2000 had a basic speaker that did beeps. There was a rumored TV board but I have never seen one in the wild. Fun tidbit, the 2000 loaded BIOS from floppy (a 720k 5.25 inch floppy). The built in ROM was a simple boot loader.


The 1000 was mostly compatible with the XT/jr with some added sound and graphics capabilities.


I have working models of the 1000 hear that I cant test with Tandy's Basica if you'd like. My 2000's are iffy so I can't make any promises. Send me the pokes you'd like to try.


Kelly

kelly at catcorner.org<mailto:kelly at catcorner.org>


________________________________
From: vcf-midatlantic <vcf-midatlantic-bounces at lists.vcfed.org><mailto:vcf-midatlantic-bounces at lists.vcfed.org> on behalf of Jonathan Gevaryahu via vcf-midatlantic <vcf-midatlantic at lists.vcfed.org><mailto:vcf-midatlantic at lists.vcfed.org>
Sent: Sunday, August 26, 2018 5:16 AM
To: vcf-midatlantic at lists.vcfed.org<mailto:vcf-midatlantic at lists.vcfed.org>
Cc: Jonathan Gevaryahu
Subject: [vcf-midatlantic] Working Tandy 1000 or 2000

Does VCF have a working Tandy 1000 or 2000 on display or in the warehouse?

I need someone with access to a working Tandy 1000/2000 to do some
poking from basic of the sound chip, since there's an issue I'm running
into with a possible incompatibility of the Tandy 1000/2000 NCR8496 PSG
(sound chip) and the more common SN76489/SN76496 PSG which the
colecovision etc used.

--
Jonathan Gevaryahu
jgevaryahu at gmail.com<mailto:jgevaryahu at gmail.com>
jgevaryahu at hotmail.com<mailto:jgevaryahu at hotmail.com>



--
Jonathan Gevaryahu
jgevaryahu at gmail.com<mailto:jgevaryahu at gmail.com>
jgevaryahu at hotmail.com<mailto:jgevaryahu at hotmail.com>


--
Jonathan Gevaryahu
jgevaryahu at gmail.com<mailto:jgevaryahu at gmail.com>
jgevaryahu at hotmail.com<mailto:jgevaryahu at hotmail.com>