RE: TI-H: direct bus access

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RE: TI-H: direct bus access

yeah, edit the ROM, that's real easy...
YES, I'm being sarcastic.  If it were that easy to do, then wouldn't we all have vastly enhanced TI's by now?  Try connecting via a CPU ports or the link port, but editing the ROM shouldn't be done unless you know exactly what you're doing.
Christopher Kalos
raptorone@stuytech.com
Executive Director/Administrator
Virtual Technologies Developer's Group


----------
From: 	Grant Stockly[SMTP:gussie@alaska.net]
Sent: 	Tuesday, January 20, 1998 12:00 AM
To: 	ti-hardware@lists.ticalc.org
Subject: 	Re: TI-H: direct bus access


The 68000 can directly access 16MB ram so editing rom to reflect the new
ram length, add a few resistors, and throw it back in the case.

>An ASM program be used instead to use it like storage only memory. It
>would be the cheaper expander method. The ROM deal would be the more
>complex version, but I have a thought.
>
>Is it possible to plant ASM in a backup to replace address ranges and
>trick the calc into reading RAM instead of ROM. Then add the new "ROM"
>code into the RAM and direct it to jump from the end of the existing
>memory and to the added memory. I realize it's probably hell to create
>suce a program, maybe impossible, but is it possible, and if it is, is
>it worth a try? If it were possible, you could have contiguous memory
>expansion with only a customized backup. It could be placed on the fargo
>backup and transfered. The altered RAM could possibly do the job.
>
>Is this possible???!!!???!!!???
>
>Richard Piotter
>richfiles1@hotmail.com
>
>>
>>
>>Thats the best thing in the world!  Now it is possible directly expand
>the
>>memory to 16MB!  (with an edited rom)
>>
>>Grant
>>
>>>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
>>
>>---
>>Grant Stockly
>>AppleCyber - http://www.alaska.net/~gussie
>>
>>
>>
>
>
>______________________________________________________
>Get Your Private, Free Email at http://www.hotmail.com

---
Grant Stockly
AppleCyber - http://www.alaska.net/~gussie
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