Re: TI-H: Medium case and TI-81 ASM

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Medium case and TI-81 ASM
From: "Richard Piotter" <richfiles1@hotmail.com>
Date: Fri, 06 Mar 1998 19:37:16 PST
Reply-To: ti-hardware@lists.ticalc.org


>The EII has 8-bit sound

Mel Tsai's planned, but never finnesed EIII had sound, but I've not 
heard of Bryan Rittmeyer or Grant producing sound on their EII!

>>Another idea, is ROM cartridges. The DBA port could possibly contain
>>programs on ROM!!! have a shell automaticly look for the DBA port on
>>startup or when a button is pressed and then use it as if it were the
>>ROM!
>
>Remember that ROMS are parallel and you only have 2 pins.

DUH... DBA stands for Direct bus access! That means that you have all 16 
address lines and the 8 data lines. I'm not talking about the link port!
Duh!!!
___________

And READ this below! I don't know if anyone cares, but I think it will 
work!!!
___________

>>Final note, I think I may know a way to use ASM on the TI-81!!! We've
>>been talking a lot lately about Direct bus access. The TI-81 is nearly
>>identical to the TI-85! If we connected the data and address bus to 
the
>>calc and a computer or some type of reader or something, we could look
>>at each individual memory location in the calc!!! We could find a way 
to
>>trick the calc into jumping to an unused address by possibly changing
>>the memory by manualy writing it to the calc. The address would be a
>>nonexistent address on the calc, but on a ROM module, it could allow
>>many, many KB of free memory and ASM!!! a Shell module could be 
plugged
>>in and accessed. It would have a through header, so individual ROM or
>>RAM modules could be added!!!
>>
>>I'm sure it could work if anyone wanted to try it! Imagine the
>>possibilities. This would also probably work on the TI-80 and every 
othe
>>link capable calc!!!
>>
>>Richard Piotter
>>richfiles1@hotmail.com
>>
>>The Richfiles TI Page
>>http://www.geocities.com/SiliconValley/Lakes/5081/Richfiles.html
>>
>>
>>______________________________________________________
>>Get Your Private, Free Email at http://www.hotmail.com
>
>
>



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