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figureing out if I have a tandy 1000 or 1000a

oblivion

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I just picked up a Tandy 1000 and I'm not sure if its a 1000 or 1000a. i suspect its a 1000a. next to the 8088 cpu slot there is a empty slot of the same size also it came with a memory board expansion which on boot up gives me 640k of RAM, it comes on 1 expansion slot and from what I've read on the origional model it takes 2 expansion slots filled to reach 640k.
 

TRS-Ian

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On the back check its catalog number... the 1000A has catalog number 25-1000A.

Re. memory upgrades, Tandy sold various memory cards for people who wanted to upgrade in steps, but the 512K single slot card you have was the best memory card.

Ian.
 

oblivion

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On the back check its catalog number... the 1000A has catalog number 25-1000A.

Re. memory upgrades, Tandy sold various memory cards for people who wanted to upgrade in steps, but the 512K single slot card you have was the best memory card.

Ian.

ok, thanks. looks like it is a 1000a after all. catalog # would be the FCC ID as well right? I have AA099R25-1000A there.
 

vwestlife

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On the back check its catalog number... the 1000A has catalog number 25-1000A.

However, someone could have swapped a 1000A motherboard into an original 1000 case.

The most noticeable difference is that the 1000A has a socket for an 8087 math co-processor, while the original 1000 does not. So based on the description "next to the 8088 cpu slot there is a empty slot of the same size", Oblivion has a 1000A.
 

oblivion

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Funny thing, I picked this up off CG with 2 other mid 90's PC's (a pent 75 and a pent 233) the other 2 won't boot which i'm thinking is because of dead PSU's. hooked the tandy up and it booted right up, no issues.

just wish it came with a keyboard. it also looks like both floppy drives are dead but it did come with a working cm-4 monitor. anyone know if there is really any diffrence between the cm-4 and cm-5 monitors?
 

Great Hierophant

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I just picked up a Tandy 1000 and I'm not sure if its a 1000 or 1000a. i suspect its a 1000a. next to the 8088 cpu slot there is a empty slot of the same size also it came with a memory board expansion which on boot up gives me 640k of RAM, it comes on 1 expansion slot and from what I've read on the origional model it takes 2 expansion slots filled to reach 640k.

It is a 1000A or 1000HD. On the back of the machine there should be a Model No. 25-1000A or 25-1001. That one-slot memory expansion board should work in the 1000, 1000A or 1000HD.
 

vwestlife

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It is a 1000A or 1000HD. On the back of the machine there should be a Model No. 25-1000A or 25-1001. That one-slot memory expansion board should work in the 1000, 1000A or 1000HD.

The 1000HD was introduced together with the original 1000, and did not include the 8087 socket. When the 1000A was introduced, the 1000HD was updated to use the 1000A's new motherboard, but did not get a new model designation (like "1000A-HD") or catalog number.

There was something called the "Trionix 8087 Adapter" which let you add an 8087 socket to the original 1000 or 1000HD:

http://support.radioshack.com/support_computer/doc1/1274.htm
 

vwestlife

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it did come with a working cm-4 monitor. anyone know if there is really any diffrence between the cm-4 and cm-5 monitors?

The CM-4 was an older version of the CM-5. Both were low-end color CGA monitors with a coarse 0.64 mm dot pitch and no anti-glare coating.
 

generic486

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You are best off getting a CM-11. They can be hard to track down but they have a much smaller dot pitch and support the extra Tandy graphics modes. You shouldn't have to pay nearly anything for one. I got a almost new Tandy 1000 HX and CM-11 and Tandy Joystick for $14 if that is anything to go by. It is worth getting the Tandy cm-11 monitor, believe me. I was suprised at how good the graphics were that at first I thought the Tandy CM-11 monitor was EGA .
 

vwestlife

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You are best off getting a CM-11. They can be hard to track down but they have a much smaller dot pitch and support the extra Tandy graphics modes. You shouldn't have to pay nearly anything for one. I got a almost new Tandy 1000 HX and CM-11 and Tandy Joystick for $14 if that is anything to go by. It is worth getting the Tandy cm-11 monitor, believe me. I was suprised at how good the graphics were that at first I thought the Tandy CM-11 monitor was EGA .

The CM-2 and CM-10 are also fine-pitch, anti-glare CGA monitors from Tandy. They were the two predecessors of the CM-11.
 

oblivion

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You are best off getting a CM-11. They can be hard to track down but they have a much smaller dot pitch and support the extra Tandy graphics modes. You shouldn't have to pay nearly anything for one. I got a almost new Tandy 1000 HX and CM-11 and Tandy Joystick for $14 if that is anything to go by. It is worth getting the Tandy cm-11 monitor, believe me. I was suprised at how good the graphics were that at first I thought the Tandy CM-11 monitor was EGA .

I will defiantly be keeping an eye out for one. so far I have 3 Tandy monitors, 2 CM-5's and a CM-4 that I've acquired from various Tandy purchases from Craigslist but i would love something a little better.
 
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