14 Dec
2001
14 Dec
'01
10:47 a.m.
Does anyone know what chip was used for the MITS
serial boards? I thought
that it was the 6850, but I could be wrong.
Weren't a lot of people using the 8251 back in those days?
I had to play some tricks in getting an interrupt-driver
written for the 8251... this was for the redoubtable
Data General One, a sort cool, sorta nasty laptop...
-dq
14 Dec
14 Dec
12:19 p.m.
Does anyone
know what chip was used for the MITS serial boards? I thought
that it was the 6850, but I could be wrong.
Weren't a lot of people using the 8251 back in those days?
I had to play some tricks in getting an interrupt-driver
written for the 8251... this was for the redoubtable
Data General One, a sort cool, sorta nasty laptop...
-dq 
2:11 p.m.
Back in those days, the raw UARTs were more affordable than the 6850 or 8251.
The latter two cost 10x what the UARTs cost.
Dick
----- Original Message -----
From: "Douglas Quebbeman" <dhquebbeman(a)theestopinalgroup.com>
To: <classiccmp(a)classiccmp.org>
Sent: Friday, December 14, 2001 9:47 AM
Subject: RE: MITS 2SIO serial chip?
Does anyone
know what chip was used for the MITS serial boards? I thought
that it was the 6850, but I could be wrong.
Weren't a lot of people using the 8251 back in those days?
I had to play some tricks in getting an interrupt-driver
written for the 8251... this was for the redoubtable
Data General One, a sort cool, sorta nasty laptop...
-dq
8428
days inactive
8428
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2 comments
3 participants
participants (3)
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dhquebbeman＠theestopinalgroup.com -
edick＠idcomm.com -
geneb＠deltasoft.com