8086 minimal board

2000-01-24 Thread Leonardo Sampaio Cardoso


Hello guys. I have just finished my 8086 minimal board (for the
microprocessor class) and I want to get elks running on it. I would like
to know the minimum ram and rom needed to get that done. It has a 8251
serial interface, a 8255 parallel interface, a 8253 timer and a 8259
pic. Any ideas? Suggestions? 

leosam



Re: 8086 minimal board

2000-01-24 Thread Alistair Riddoch

On Mon, Jan 24, 2000 at 03:26:24PM -0200, Leonardo Sampaio Cardoso wrote:
 
 Hello guys. I have just finished my 8086 minimal board (for the
 microprocessor class) and I want to get elks running on it. I would like
 to know the minimum ram and rom needed to get that done. It has a 8251
 serial interface, a 8255 parallel interface, a 8253 timer and a 8259
 pic. Any ideas? Suggestions? 
 

As an absolute minimum I think you need 64K of RAM and 64K of ROM to build
a system that will allow you to run a couple of apps. If you want to
be able to log in and run a shell, you will need a filesytem. In this
case in addition to the 64K kernel ROM you will need 128K or so
of filesystem ROM, and probably 128K of RAM. The rest of the chips you have
in mind sound fine.

Al