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computers / comp.sys.ibm.ps2.hardware / Re: Which came first? Chicken or... [8530 the first?]

SubjectAuthor
* Which came first? Chicken or... [8530 the first?]Louis Ohland
`* Re: Which came first? Chicken or... [8530 the first?]IBMMuseum
 `- Re: Which came first? Chicken or... [8530 the first?]Louis Ohland

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Which came first? Chicken or... [8530 the first?]

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From: ohl...@charter.net (Louis Ohland)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Which came first? Chicken or... [8530 the first?]
Date: Mon, 28 Feb 2022 13:36:47 -0600
Organization: csiph.com Internet News Service
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 by: Louis Ohland - Mon, 28 Feb 2022 19:36 UTC

8530 has a BIOS from Sep '86, and announcement 187-048

8525 has a BIOS from Jun '87, and announcement 187-148

It appears that again, IBM made a lower end system after a better
performing unit. Or so it seems...

Re: Which came first? Chicken or... [8530 the first?]

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Subject: Re: Which came first? Chicken or... [8530 the first?]
From: ibmmus...@gmail.com (IBMMuseum)
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 by: IBMMuseum - Tue, 1 Mar 2022 03:09 UTC

> 8530 has a BIOS from Sep '86, and announcement 187-048
>
> 8525 has a BIOS from Jun '87, and announcement 187-148
>
> It appears that again, IBM made a lower end system after a better
> performing unit. Or so it seems...

The only functional difference (at the 8086-based level) - other than the integrated display - is that the Model 25 lacks the Real-Time Clock.

Re: Which came first? Chicken or... [8530 the first?]

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From: ohl...@charter.net (Louis Ohland)
Newsgroups: comp.sys.ibm.ps2.hardware
Subject: Re: Which came first? Chicken or... [8530 the first?]
Date: Mon, 28 Feb 2022 21:29:06 -0600
Organization: csiph.com Internet News Service
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 by: Louis Ohland - Tue, 1 Mar 2022 03:29 UTC

Drink to the foam...

My curious-blue is the date of the BIOS chips on the 30 being before the
April 87 release of the PS/2, not the similarities of construction.

Reminds me of the Computer Chronicles video with Chet Heath [PBUH] where
he is showing the 7552 processor card in a Model 60 system.

https://ardent-tool.com/7552/Architecture.html#Test_Tool

Makes one wonder when MCA was developed and in existence. Methinks the
25/30 were more than an attempt to shovel an ISA system out the door.

On 2/28/2022 21:09, IBMMuseum wrote:
>> 8530 has a BIOS from Sep '86, and announcement 187-048
>>
>> 8525 has a BIOS from Jun '87, and announcement 187-148
>>
>> It appears that again, IBM made a lower end system after a better
>> performing unit. Or so it seems...
>
> The only functional difference (at the 8086-based level) - other than the integrated display - is that the Model 25 lacks the Real-Time Clock.

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