Re: Adding system memory to a ti85
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Re: Adding system memory to a ti85
Of course you can do as I might one day and replace the rom altogether with
my own code included....
At 12:28 AM 7/23/98 -0400, Ray Kremer wrote:
>Okay, I guess I got the numbers wrong. I'm no expert with the technical
>details, and I was writing this from memory. TI's faq explains the whole
>thing at: http://www.ti.com/calc/docs/faq/86faq208.htm
>Ignore the numbers I wrote though, and I essentially had it right. You
>could not add more RAM directly to the circuit board because the 85 is
>already at its max without the paging system that the 86 has.
>
>>You sure? The Z80 has a 16-bit address range, allowing it to manage 65536
>>bytes total I believe.
>>
>>At 07:51 PM 7/22/98 -0400, Ray Kremer wrote:
>>>I would say no. The Z80 processor is only capable of managing 24k of memory
>>>at a time, which is what the 85 already has. When TI produced the 86 with
>>>96k of memory, they had to write a complex "RAM paging" system to handle it
>>>all.
>
>
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