Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!srcsip!orion!rogers
From: rogers@orion.SRC.Honeywell.COM (Brynn Rogers)
Newsgroups: comp.sys.ibm.pc
Subject: Re: NEC equivalent of 8086????
Message-ID: <26757@srcsip.UUCP>
Date: 1 Aug 89 15:32:54 GMT
References: <8710@attctc.Dallas.TX.US> <1691@neoucom.UUCP> <245@jwren.UUCP>
Sender: news@src.honeywell.COM
Reply-To: rogers@src.honeywell.com (Brynn Rogers)
Organization: Honeywell Systems & Research Center
Lines: 28

In article <245@jwren.UUCP> jcw@jwren.UUCP (John C. Wren) writes:

>Both of these processors have 80186 compatible instructions, such as
>PUSHA and POPA.  If you have Custom Software Systems VI editor, you
>can run the one labeled 286 under a V20.  Pretty neat, huh?  Now, does
>anyone know what a V25 is?
>							- John C. Wren
>							  jcw@jwren.UUCP

Sure, a V25 is kind of like a 80188, sort of.

It has a number of features that make it much better, and is my chip
of choice for an embedded system.  some of these features are:
   8 register banks! remember the Z80 had 2 8080 register banks?
     well the V25 has 8 8086 register banks.
   on chip serial port (maybe two, can't remember)
   on chip 5 Mbytes per second DMA that works (unlike a Z280's DMA)
   Lots of Programmable IO lines (24?)
   runs at least twice as fast as a 80188, at the same clock speed
   on board ROM or EPROM of 8k Bytes (and instruction fetchs from 
   internal rom take 1 clock) (not sure if those are word or bytes)
   1K byte on board RAM

whew!
It is not pin compatible with a 80188, and it costs about $25.

 Brynn Rogers    Honeywell S&RC        rogers@src.honeywell.com
       612-782-7737                use this address if your reply bounces