RE: TI-H: direct bus access

To: ti-hardware@lists.ticalc.org
Subject: RE: TI-H: direct bus access
From: Christopher Lambert <clambert@sparcy.geneva.edu>
Date: Tue, 20 Jan 1998 01:52:36 -0500 (EST)
In-Reply-To: <v02110104b0e9e2657776@[206.149.127.65]>
Reply-To: ti-hardware@lists.ticalc.org

BEFORE YOU GUYS GO NUTS AND JUMP TO CONCLUSIONS!!!!!!!

There ARE limitations!  I have not been able to do it with anything other 
than a calc with an internal ROM.  You can see what I have done if you 
visit my page.   (www.geocities.com/SiliconValley/Peaks/6869)

I Am going to be using it to build a robot.  They will HOPEFULLY be quite 
complex.

If you use my work or ideas, ALL I ASK is that you give me credit for 
what I have done......  Tell me that you are going to use something too 
if you can.  I have no problems with it, but please just put my name on it 
somewhere....  That's all I ask.  I know I am greedy, but I don't think 
that is too much to ask.  (If I missed anyone's name on my page for work 
they did, tell me and I will put it there.)

Chris Lambert
clambert@geneva.edu
calan@hotmail.com
URL: www.geocities.com/siliconvalley/peaks/6869

On Mon, 19 Jan 1998, Grant Stockly wrote:

> 
> But why do that when the calc is meant to do up to 16?  The Classic, SE,
> Plus, 512, 128, and some other macs all had a max of at least 4 (8086
> comparable)
> 
> Unless you mean switching the banks with the link port, or unused processor
> outs with a TSR?  how do you plan to switch the banks?
> 
> >EMS, the enhanced memory spec back in the XT days...
> >It used 64K pages to switch banks of extra RAM.  Reduce that to say, 16K
> >or 8K pages, and you're set.  actually, address it by 16-bit values.  64K
> >is available, and then implement a method of switching pages.  It's slow,
> >but can allow you to have a lot more space, provided you can find a place
> >to stash the RAM chips.
> >Christopher Kalos
> >raptorone@stuytech.com
> >Executive Director/Administrator
> >Virtual Technologies Developer's Group
> >
> >
> >----------
> >From:   Christopher Lambert[SMTP:clambert@sparcy.geneva.edu]
> >Sent:   Monday, January 19, 1998 9:56 PM
> >To:     ti-hardware@lists.ticalc.org
> >Subject:        TI-H: direct bus access
> >
> >
> >
> >Would anyone care if I told you that I have achieved direct bus access to
> >a TI 92?  This has enabeled me to create external memory-mapped I/O
> >ports.  Is this a good thing or does anyone even care?
> >
> >Chris Lambert
> >clambert@geneva.edu
> >calan@hotmail.com
> >URL: www.geocities.com/siliconvalley/peaks/6869
> >
> >Content-Type: application/ms-tnef
> >
> >Attachment converted: Macintosh HD:RE- TI-H- direct bus access (????/----)
> >(0000FF82)
> 
> ---
> Grant Stockly
> AppleCyber - http://www.alaska.net/~gussie
> 
> 
>

References:

RE: TI-H: direct bus access

From: gussie@alaska.net (Grant Stockly)