Author Topic: You can help us solve a few mysteries!  (Read 21790 times)

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Offline JosJuice

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Re: You can help us solve a few mysteries!
« Reply #15 on: July 11, 2011, 03:38:59 am »
1. TI-84+SE (with ViewScreen slot)
2. S-1204A
3. No
4. 10 July 2011 v#2
5. Yes
6. 44
7. 0F
8. 04C4
9. 000000

Offline the_mad_joob

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Re: You can help us solve a few mysteries!
« Reply #16 on: July 11, 2011, 03:55:50 am »
there u go :

1 > 84+se with viewscreen slot
2 > S-0404 (a true rolls royce =])
3 > no
4 > 2
5 > yep
6 > 44
7 > 0F
8 > 04C4
9 > 000000

Offline the_mad_joob

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Re: You can help us solve a few mysteries!
« Reply #17 on: July 11, 2011, 04:18:26 am »
Strange results :

1 > 83+ with viewscreen slot
2 > I-0299A
3 > yep
4 > 2
5 > 83+
6 > 15
7 > No
8 > 0123
9 > 010146

EDIT : A fat sry for the 2ble post i'm really tired...
« Last Edit: July 11, 2011, 04:19:44 am by the_mad_joob »

Offline DrDnar

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Re: You can help us solve a few mysteries!
« Reply #18 on: July 11, 2011, 04:39:52 am »
Fascinating! Those numbers suggest that the boot sector is hard-locked on that unit. Yet, another TI-83+ owner said that his boot sector wasn't locked. If it's really a a unit from 1999, then TI has substantially changed the TI-83+'s hardware since then (but, we already knew that). This means that TI used the flash chip's locking feature before moving to the ASIC. Now, it's the ASIC itself that handles locking. More experimentation on newer units is clearly called for.

Also, speaking of newer units, while I'm glad that older members of the community with older units are active during the summer, it's the transition between 128 K of RAM and 48 K that I'm most interested in. So, let's get information on some newer models.

Here's the data so far:
Code: [Select]
Known manufacturer IDs are

ID Manufacturer
01 AMD
04 Fujitsu
7F Unknown
C2 Unknown

Known device IDs are

ID Device
23 512 K (4 megabit) (old units)
B9 512 K (4 megabit) (new units)
C4 2048 K (16 megabit)
DA 1024 K (8 megabit)


Data Chart

Note: VS = ViewScreen

Model HW Bad LCD V# All RAM Port 15 Port 3A Chip ID Boot Owner
84+SE S-0605D No 2 Yes 45 00 04C4 000000 Me
84+SE S-0404 No 2 Yes 44 0F 04C4 000000 Runer112
84+ S-0406F Yes 2 Yes 45 00 01DA 000000 Eeems
84+SE P-0508M Yes 2 No 55 00 01C4 000000 thepenguin77
84+SE P-0510O Yes 2 No 55 00 7FC4 000000 thepenguin77
83+ S-0508K No 2 N/A 00 N/A 01B9 000045 Juju
84+SE S-0606F No 2 Yes 45 00 01C4 000000 graphmastur
84+ K-0207E No 2 Yes 45 00 C2DA 000000 ZippyDee
84+SE S0306-F 10h 2 Yes 45 00 01C4 000000 BuckeyeDude
84+SEVS S-1204A No 2 Yes 44 0F 04C4 000000 JosJuice
84+SEVS S-0404 No 2 Yes 44 0F 04C4 000000 the_mad_joob
83+VS I-0299A Yes 2 N/A 15 No 0123 010146 the_mad_joob
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Offline the_mad_joob

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Re: You can help us solve a few mysteries!
« Reply #19 on: July 11, 2011, 05:01:12 am »
@Runer112 :

Could you please tell if you have a viewscreen slot at the back of your model ?
Because if yes, there's a chance port 3A would be related to this additionnal hardware piece.
Nothing sure yet, since my 83+VS ouputs a "No" on that part of the test...

Thx in advance =]
« Last Edit: July 11, 2011, 05:36:52 am by the_mad_joob »

Offline ztrumpet

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Re: You can help us solve a few mysteries!
« Reply #20 on: July 11, 2011, 09:41:28 am »
@Runer112 :

Could you please tell if you have a viewscreen slot at the back of your model ?
Because if yes, there's a chance port 3A would be related to this additionnal hardware piece.
Nothing sure yet, since my 83+VS ouputs a "No" on that part of the test...

Thx in advance =]
That's because yours is an 83+.  It outputted "No" because that test is not conducted on an 83+/83+SE.

Edit:  ZippyDee has a K. O.O  :w00t:  (I was hoping we could do some tests on those.  (My opinion is those are "refurbished" calcs, i.e. calcs that were returned to TI as defective and then fixed and redistributed.  I have no hard evidence to prove that, but it's my theory anyway. ;) )
« Last Edit: July 11, 2011, 10:01:25 am by ztrumpet »

Offline the_mad_joob

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Re: You can help us solve a few mysteries!
« Reply #21 on: July 11, 2011, 10:04:08 am »
Thought of something like this but since i wasn't sure you know...
Thx 4 clarification =]

Other than that, i'm pretty sure Runer112 has a VS port on his 84+SE, since it's exactly the same data as mine.
For now, it's not too risky to say that 3A has something to do with the viewscreen port.
Unfortunately, it'll be quite hard to know precisely what are the read/write values, since someone that has both hardware may be hard to find (brandon maybe ?).
Also, to be honest, i'm not sure it would be such a great discovery, even for the active community...
« Last Edit: July 11, 2011, 10:04:52 am by the_mad_joob »

Offline thepenguin77

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Re: You can help us solve a few mysteries!
« Reply #22 on: July 11, 2011, 10:04:59 am »
I think we figured out port 15h.

On the non 83+:
   Port 15 is split up into two fields, the high nibble and the low nibble.
High nibble:
   4 - Calculator has full ram
   5 - Calculator is missing ram
Low nibble:
   4 - Port 3A is 0F
   5 - Port 3A is 00

Of course the high nibble also means which ASIC you have, but I don't know what those are called.

Edit:
   Wait a second, changed low nibble. When we figure out what 3A means, then we can finish this.

Edit2:
   the_mad_joob: Your calculator does not have a port 3A :D, so it can't display the correct number.
« Last Edit: July 11, 2011, 10:11:22 am by thepenguin77 »
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Offline the_mad_joob

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Re: You can help us solve a few mysteries!
« Reply #23 on: July 11, 2011, 10:15:31 am »
That makes sense when i read Dnar's table.
Nice read =]
This would mean port 15 can only be read.
At least, it adds a fast and easy way to evaluate the optionnal hardware presence (ram & vs) =]

[Crossed Edit] : Yeah, that's what ztrumpet meant i guess. That would suppose that another port than 3A is used on basic ti83+ models (for viewscreen).
« Last Edit: July 11, 2011, 10:45:39 am by the_mad_joob »

Offline ZippyDee

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Re: You can help us solve a few mysteries!
« Reply #24 on: July 11, 2011, 10:22:48 am »
ZippyDee has a K. O.O  :w00t:  (I was hoping we could do some tests on those.  (My opinion is those are "refurbished" calcs, i.e. calcs that were returned to TI as defective and then fixed and redistributed.  I have no hard evidence to prove that, but it's my theory anyway. ;) )
Tests? I'd be happy to help with some tests...I didn't know my calc was special :P
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Offline Mighty Moose

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Re: You can help us solve a few mysteries!
« Reply #25 on: July 11, 2011, 10:56:54 am »
Here you go!

1. TI-84+SE Teacher Edition (ViewScreen?)
2. S-0404
3. No ALCDFIX
4. 10 July 2011 v#2
5. 128k RAM: Yes
6. Port 15h: 44
7. Port 3Ah: 0F
8. IDs:04C4
9. P?: 000000
(note: Certificate modified with ThePenguin's ABOUTNAM program, also uses zstart)

1. TI-84+
2. S-0306F
3. No ALCDFIX
4. 10 July 2011 v#2
5. 128k RAM: Yes
6. Port 15h: 45
7. Port 3Ah: 00
8. IDs: 01DA
9. P?: 000000
Cheers!
I beta test, so...yeah.  PM me if you want me to test anything :D.

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Cogito ergo sum.

Calcs:
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Offline jnesselr

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Re: You can help us solve a few mysteries!
« Reply #26 on: July 11, 2011, 11:06:56 am »
Apparently, you can only actually write to the high-nibble of 3A, but when you write to the low one, it's ignored.  After writing 0xFF (Which ends up being 0xF0 because only the high nibble is accepted) and turning off my calc and then back on, it ends up being 0x60.

Offline the_mad_joob

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Re: You can help us solve a few mysteries!
« Reply #27 on: July 11, 2011, 11:07:17 am »
Looks like Runer112, Mighty Moose & me have the exact same 84+SE.

Offline thepenguin77

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Re: You can help us solve a few mysteries!
« Reply #28 on: July 11, 2011, 11:16:40 am »
Runer does not have a view screen adapter, which means that port 3A refers to a different USB hardware revision.

Here is what I put on WikiTI

[ wikiTI]
This port reports the ASIC version from which the number of ram pages and USB driver revision can be determined. On the 83+, it does something different.

Read Values
    33 - TI-REF 83PL2M/TA2 - No USB driver and has 128KB of RAM
    44 - TI-REF 83PLUSB/TA2 - Uses old USB driver and has 128KB of RAM
    45 - TI-REF 84PLUSB/TA3 - Uses new USB driver and has 128KB of RAM
    55 - TI-REF 84PLC/TA1 - Uses new USB driver and has 48KB of RAM
Write Values
    No effect
[/ wikiTI]

I really have to thank critor back on that old thread on UTI or else I wouldn't have figured out the difference between 44/45.
« Last Edit: July 11, 2011, 11:50:15 am by thepenguin77 »
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Offline Runer112

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Re: You can help us solve a few mysteries!
« Reply #29 on: July 11, 2011, 11:16:52 am »
My calculator does not have a ViewScreen port. Otherwise, it seems to be pretty much the same.