another hp2100 wannabe

[Bob Shannon]

2114's top out at 8 K words.

As far as I can tell, there never was a 2114C shipped.  Both A's and B's 
came stock
with 4K, and 8K was an option ( very common on the B's).

Also 2114A's don't have DMA, but B's do, but only a single channel.

----- Original Message ----- 
From: "Eric Smith" <eric at brouhaha.com>
To: "General Discussion: On-Topic and Off-Topic Posts" 
<cctalk at classiccmp.org>
Sent: Sunday, March 27, 2005 10:39 PM
Subject: Re: another hp2100 wannabe


>I wrote about HP 2000 Time Shared BASIC:
>> 2000A only uses a single CPU, as did 2000B and 2000E.
>
> Jay wrote:
>> Actually, 2000A and 2000E were the single cpu versions. 2000B was
>> definitely a dual cpu configuration, sold at least initially on a 2116
>> for the main cpu and a 2114 for the "I/O processor".
>
> Oops, you're right.  My own web page has the correct info, but my
> memory is terrible.
>
> Tim wrote:
>>>> Perhaps it could have been an hp-2114c running ACCESS 2000E?
>
> I wrote:
>>> I'm not sure whether 2000E would run on a 2114
> and Jay wrote:
>> I'm not sure 2000E would run on a 2114. It just might.
>
> Now that I think about it more, I'm fairly certain that it won't,
> because 2000E (and 2000F and 2000/Access) require the floating point
> microcode that is not available for the 2114/2115/2116.
>
> How much memory can a 2114 be equipped with?  That's another potential
> problem with trying to use a 2114 for either 2000A or 2000E, or as a
> system processor for the dual-processor versions.  The 2114 might also
> be short on I/O slots, though it has enough to be an I/O processor
> for 2000B and 2000C.
>
> Eric
>
>