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Re: A92: FLASH technology, ti92+, and 89
Well, in short, FLASH is a new type of ROM that is electronically
erasable and programmable. It goes in sectors, not by pins. The
FLASH on board the 92+ and 89 has 2 MB. Not all of that is TI's
code, because we are making room for things to come (I don't think
I can get more specific than that at this point). The sectors are
selected in 64 kB chunks, so that can give us the 384 kB. You
shouldn't be able to erase all the program code by an errant
assembly instruction - I've been working hard to make sure of that!!
As far as ASM support goes, you will have the same support as the
86 and 92+. I think that we will even provide a C header file to help
you write your programs. We are trying to piece together ASAP
documentation as we speak, so I will know more about it in the
coming weeks. I hope that this helps.
Shawn A. Prestridge
Texas Instruments, Inc.
Educational & Productivity Solutions
7800 Banner Drive MS 3908
Dallas, Texas 75251
(972) 917-1698
(972) 917-7103 FAX
"He's back... Kicking bottom or what?!?!" --Holly, Red Dwarf
rc_ware@hotmail.com on 03/13/98 02:01:59 PM
Please respond to assembly-92@lists.ticalc.org
To: assembly-92@lists.ticalc.org
cc: (bcc: Shawn Prestridge/TXN)
Subject: A92: FLASH technology, ti92+, and 89
FLASH technology
what exactly is this anyway? i mean i read in one place that it is like
EEPROM (electronically eraseable programmable read only memory) which is
just basically RAM except that it isn't erased when there's no
electricity applied to it, and then i go somewhere else and it tells me
that it's just ROM that can be changed only by the ti company or some
crap.
here's my reasoning--if it is EEPROM and it does store the ROM-image to
run the calculator then can't a person accidentally delete this and the
calculator will become unusable? if it's just ROM then why does it say
that 300 and some of it can be programs and data, is that just for the
ti company to use to upgrade the ROM? 500K is an uneven pin number to
me...how much exactly is this FLASH using--i mean 18 pin combinations
give 256K possible selecting and 19 pin combinations gives 512K you
can't have a partial pin combination (in a sense that pin is that thing
that sticks out of a microchip).
TI-92+ and 89
when the 92+ module comes out will it be able to do assembly programming
like the 83s and 86s? if so, how much documentation are we going to
receive from the ti company about how to use it, what locations in
memory do what, what jumps are legal, etc.? if the 92+ isn't supporting
assembly then why did i read somewhere that the 89 was, and yet the 92+
and 89 are supposed to be similar in ROM?
if i'm wrong in any way, please feel free to flame me all you want, just
as long as i get some sort of response.
-Rob
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