Re: TI-H: TI-89/92 ROMs NOT compatible

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: TI-89/92 ROMs NOT compatible
From: gussie@alaska.net (Grant Stockly)
Date: Sat, 21 Mar 1998 13:52:15 -0700
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: ti-hardware@lists.ticalc.org


>Is is possible to make the hard drive part of the EII?  Like an extension,
>get the smallest EII chip, use it as a dedicated driver for the HD, and then
>figure out how to format the HD.  If we format it IBM, then we can download
>games and stuff from the computer to the HD, and not need a link cable.

Yes...I'm currently working on one.  I spent an entire day reasearching
them...  The EII driver will be compatible with them.  It isn't too hard to
work with HDS once you get the firmware done...  There will be an avr
connected to an AVR.  It will be good if you get 1k per sec since it has to
send a nibble of a nibble at a time...

Is anyone interested in an internal EII?

>>Probably on the 89 or 92with + module...we'd have to modify the calcs rom
>>and use a special bus address line.  That would mean we would have to find
>>an empty space in rom...  Maybe a pointer in the flash rom (in 89 or +
>>module) that looks for the driver in RAM.  If it finds it then it can
>>access the HD.  we don't have enough room in rom for a HD driver...  we
>>need at least 12k
>>
>>Grant
>>
>>>http://www.eklektix.com/gfc/gsale/ He only has one, though.  How hard
>would
>>>it be to change the program to suit a different sized hard drive?  Also,
>>>where can you get yours?  Go for 40MB, 2 dollars won't break anyone, even
>if
>>>noone will go over 20MB in the first place, still, 8 years ago I though I
>>>would never outgrow my 40MB drive!!!  And if we get more space, the
>programs
>>>can be made bigger, better, and with more cool pics.  Imagine a 100MB calc
>>>game :-)  Anyways, think about it.
>>>
>>>
>>>>
>>>>Where?  I can get 20MB for $2 and 40MB for $4...
>>>>
>>>>>I know where to get a 100MB SCSI drive for $20 or less, would that still
>>>>>work?  I don't know where to buy a 20MB!!!
>>>>>
>>>>>
>>>>>>
>>>>>>For now lets do a 20MB HD...then we can get a 21.5GB Quantum to work
>:)
>>>>>>
>>>>>>>Yeah, CD-ROM support!!  Get every single Fargo program on one CD-R and
>>>pop
>>>>>>>it in!  Well, a small hard drive would be more practical. . .
>>>>>>>
>>>>>>>>Does anyone want SCSI support on the TI92/89?  I was diging around my
>>>>>>>>"treasure" room and found my "hot wired" 512k.  Apple sold 200 of
>those
>>>>>to
>>>>>>>>special distributiors to demonstrate the 'puter.  They thought that
>>>>>>>>customers would buy a computer if it had 4MB/SCSI/800k instead of
>>>>>>>>512k/400k...
>>>>>>>>
>>>>>>>>
>>>>>>>>The neat thing is that steve jobs actually signed the motherboard!
>not
>>>>>>>>only the Case!  There are about 20 wires running from the CPU to a
>chip
>>>>>>>>which connects to a ribon cable and then goes out the battery port
>>>thing.
>>>>>>>>It uses the standard a SCSI controller so...SCSI on the 92!  I think
>>>its
>>>>>a
>>>>>>>>NCR.
>>>>>>>>
>>>>>>>>>> new OS onto the chip.  With 1 meg of space on it, why not put a
>>>>>modified
>>>>>>>>>> MacOS?  When I say modified, I mean, moving the command keys
>around,
>>>>>and
>>>>>>>>>> pointing the ADB port out the link port (we'd have to supply power
>>>>>>>>>> seperatly.)
>>>>>>>>>
>>>>>>>>>OS is Easily done, but I don't know about ADB.
>>>>>>>>
>>>>>>>>Just use the arrow keys...
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>
>>>>
>>>>
>>
>>
>>

Follow-Ups:

TI-H: Internal EII

From: Chris Cooper <cooper@fort-frances.LakeheadU.Ca>