Re: IIgs Accelerator Project

[Jonas Bevren <jbevren@burninghorizon.com>]

On Sun, 20 Feb 2000, Frank Carney wrote:

> Date: Sun, 20 Feb 2000 12:45:03 -0700
> From: Frank Carney <frankcTAKETHISOUT@ANDTHISALSOsrv.net>
> Newsgroups: comp.sys.apple2
> Subject: Re: IIgs Accelerator Project
> 
> Update:
> I now have a working 8088 circuit!  It is very exciting it turns on a
> led!

Congradulations!!! That's a LEAP forward. =)

> The circuit is surprisingly simple.  All it has in it now is an 8088,
> 8284, 3 74373s (for address latch and buffering), a 74245 (data bus
> buffer), a 7404, a 7432, a EPROM, and a 74373 (for port ouput to light
> the led).

Sounds right for an 8088-based circuit. =)

> Anyway, I know it is not much, but it is a start!  Also, I did some
> searches for higher speed microcontrollers and I found that the 8051 can
> be had in speeds up to 40Mhz.  Does anyone know if there are higher
> speed 8088s available and where?  I know that GE PLCs use a 16Mhz 80188
> so I hope there are faster 8088s available.  This would make upgrading
> the speed a lot easier and easier to create faster accelerator models. 
> The complexity of breadboarding a 8088 as compared to a 386 is at least
> 16 fold due to the number of bus lines!

Yep.  386's are 32-bit, but are their address lines separate from their data
lines??  Anywho, intel makes the 80186 series cpu's for embedded systems
(what you're designing is, after all, embedded).  I dont know how fast it
runs, but look it up on developer.intel.com.

-Jonas

ps: I wanna use an ARM for a portable computer project some time.  They run
at 233mhz and on very little power too. =)