Path: utzoo!utgpu!attcan!uunet!van-bc!root
From: lphillips@lpami.wimsey.bc.ca (Larry Phillips)
Newsgroups: comp.sys.amiga
Subject: Re: Query.  B2000?  (Was: Sticky Power-On Reboots with CMI)
Message-ID: <2050@van-bc.UUCP>
Date: 22 Dec 88 14:45:16 GMT
Sender: root@van-bc.UUCP
Lines: 45

In <268@sed170.HAC.COM>, lee@sed170.HAC.COM (John Lee ) writes:
> 	Certainly.  Most simply, a B2000 is a later production Amiga 2000.
> An earlier model of the Amiga 2000, called the A2000, was very little more
> than a repackaged A1000 with Kickstart ROM, a CPU slot, and ZorroII and IBM
> slots.

	This goes for both the A2000 and B2000

>  The B2000 added the RT clock, video slot, improved CPU slot, BUSTER

	The A2000 has a real time clock. It also has a video slot, but with only
one connector. This made for a fun installation of a flickerFixer, the rear
edge fingers look a bit like a spider walking on the IC of the motherboard now.
:-)


> chip, heftier power supply, and some other design changes.  As far as I know

	Don't know about the power supply. The other design changes were that tehy
went from a 4 layer motherboard in the A2000 to a 2 layer in the B2000. The
second 512K ($C00000) memory on the A2000 was plugged into the CPU slot, and
had permanent hardwired wait states, due to some tricky timings when accessing
Half-FAST memory 'externally'. The A2000 had no RCA jack for composite video.

> only the early Amiga 2000's were A2000's while the vast majority are B2000's
> (as the current production models are.)  I believe that the A2000 is the
> German design while the B2000 is the US design.  Software-wise, they are
> identical to each other as they are identical to the A1000.
>     This is off the top of my head, so really a C-A person should verify all
> this.


	You got most of it. I'm still glad I didn't wait until the B2000 came out,
even though I am now in need of a trade-in.

-larry

--
"Intelligent CPU?  I thought you said Intel CPU!" 
        -Anonymous IBM designer-
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|   //   Larry Phillips                                                |
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