[vcf-midatlantic] Working Tandy 1000 or 2000

[Jonathan Gevaryahu]

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
>>
>>
>>
>> ------------------------------------------------------------------------
>> *From:* vcf-midatlantic <vcf-midatlantic-bounces at lists.vcfed.org> on 
>> behalf of Jonathan Gevaryahu via vcf-midatlantic 
>> <vcf-midatlantic at lists.vcfed.org>
>> *Sent:* Sunday, August 26, 2018 5:16 AM
>> *To:* 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
>> jgevaryahu at hotmail.com
>>
>
> -- 
> Jonathan Gevaryahu
> jgevaryahu at gmail.com
> jgevaryahu at hotmail.com


-- 
Jonathan Gevaryahu
jgevaryahu at gmail.com
jgevaryahu at hotmail.com