Author Topic: TI-81 Screen Types?  (Read 22900 times)

0 Members and 1 Guest are viewing this topic.

Offline TIfanx1999

  • ಠ_ಠ ( ͡° ͜ʖ ͡°)
  • CoT Emeritus
  • LV13 Extreme Addict (Next: 9001)
  • *
  • Posts: 6173
  • Rating: +191/-9
    • View Profile
Re: TI-81 Screen Types?
« Reply #15 on: July 29, 2013, 03:57:59 am »
Good detective work there. :) Also, the backup battery missing in some models is weird. By design it's clear that there was intended to be space for one.
« Last Edit: July 29, 2013, 03:59:26 am by Art_of_camelot »

Offline CVSoft

  • LV3 Member (Next: 100)
  • ***
  • Posts: 65
  • Rating: +5/-0
    • View Profile
    • CVSoft Homepage (work in progress)
Re: TI-81 Screen Types?
« Reply #16 on: July 31, 2013, 04:40:17 pm »
Perhaps they had problems with making the backup battery terminals fit inside the calculator, or that the backup battery was causing problems with the RAM. Either way, they intended to have one but it didn't happen.
Current projects:
Sunθ v4.0 (Solar Position Calculator) (on hold)
CBLLight/CBLTherm (TI-Z80 only)
CBLM (68k only)
--KJ6PSG

Offline TIfanx1999

  • ಠ_ಠ ( ͡° ͜ʖ ͡°)
  • CoT Emeritus
  • LV13 Extreme Addict (Next: 9001)
  • *
  • Posts: 6173
  • Rating: +191/-9
    • View Profile
Re: TI-81 Screen Types?
« Reply #17 on: August 01, 2013, 10:49:30 am »
Yea, I saw that page too. I was looking at some stuff the other day and decided to see if data math had any info. Gotta love datamath. :D

Offline DJ Omnimaga

  • Clacualters are teh gr33t
  • CoT Emeritus
  • LV15 Omnimagician (Next: --)
  • *
  • Posts: 55935
  • Rating: +3153/-232
  • CodeWalrus founder & retired Omnimaga founder
    • View Profile
    • DJ Omnimaga Music
Re: Re: TI-81 Screen Types?
« Reply #18 on: August 01, 2013, 06:44:22 pm »
Yeah my 81 has a round space where would be a backup battery, but none can be inserted. By the way how long are those batteries supposed to last? In NES games some of my batteries have lasted for 25+ years and still keeps my saves fine, while some other NES or even SNES games had dead batteries after only 3 years. Also TI says to replace the battery after 3 years, yet mines worked fine for nearly a decade in some cases.

Offline CVSoft

  • LV3 Member (Next: 100)
  • ***
  • Posts: 65
  • Rating: +5/-0
    • View Profile
    • CVSoft Homepage (work in progress)
Re: TI-81 Screen Types?
« Reply #19 on: August 04, 2013, 06:32:47 am »
All of my calcs are still on the original backup batteries, the oldest being my 1994 TI-85 (which is 19 years this month :D )

Datamath has a lot of goodies that aren't well linked, for some reason.
Current projects:
Sunθ v4.0 (Solar Position Calculator) (on hold)
CBLLight/CBLTherm (TI-Z80 only)
CBLM (68k only)
--KJ6PSG

Offline TIfanx1999

  • ಠ_ಠ ( ͡° ͜ʖ ͡°)
  • CoT Emeritus
  • LV13 Extreme Addict (Next: 9001)
  • *
  • Posts: 6173
  • Rating: +191/-9
    • View Profile
Re: TI-81 Screen Types?
« Reply #20 on: August 04, 2013, 07:34:34 am »
It's possible that the backup battery has been changed at some point before you had the calculator. Unless it's a family heirloom or something. :P

Offline CVSoft

  • LV3 Member (Next: 100)
  • ***
  • Posts: 65
  • Rating: +5/-0
    • View Profile
    • CVSoft Homepage (work in progress)
Re: TI-81 Screen Types?
« Reply #21 on: August 04, 2013, 07:37:57 am »
At least on the 85 it ws used for a year and kept in a drawer for a little over a decade before I got it. I doubt it was ever changed.
Current projects:
Sunθ v4.0 (Solar Position Calculator) (on hold)
CBLLight/CBLTherm (TI-Z80 only)
CBLM (68k only)
--KJ6PSG

Offline TravisE

  • LV4 Regular (Next: 200)
  • ****
  • Posts: 182
  • Rating: +33/-0
    • View Profile
    • ticalc.org
Re: TI-81 Screen Types?
« Reply #22 on: August 05, 2013, 07:37:16 pm »
I don't think I've ever changed the backup batteries on any of my calcs. I don't use my oldest ones anymore, and I don't even remember if they still remember the memory contents. I think if the main batteries are out long enough some of them might do a RAM clear, but they seem to be able to retain it for short periods.

I also have some Game Boy carts approaching 15–20+ years and haven't had any dead saves yet. :) Never any problems with NES/SNES ones back in the day, either, though Nintendo said they would last 5 years.
« Last Edit: August 05, 2013, 07:38:55 pm by TravisE »
ticalc.org staff member—http://www.ticalc.org/

Offline Eiyeron

  • Urist McEiyolobster
  • LV10 31337 u53r (Next: 2000)
  • **********
  • Posts: 1430
  • Rating: +130/-10
  • (-_(//));
    • View Profile
    • Rétro-Actif : Rétro/Prog/Blog
Re: TI-81 Screen Types?
« Reply #23 on: August 06, 2013, 03:15:12 am »
( I lost my 249 PKMNS with a depleted battery... Poor Gold version)

Have batteries existed from the beggining?

Offline DJ Omnimaga

  • Clacualters are teh gr33t
  • CoT Emeritus
  • LV15 Omnimagician (Next: --)
  • *
  • Posts: 55935
  • Rating: +3153/-232
  • CodeWalrus founder & retired Omnimaga founder
    • View Profile
    • DJ Omnimaga Music
Re: Re: TI-81 Screen Types?
« Reply #24 on: August 06, 2013, 11:16:28 am »
Pokemon Gold and Silver last much shorter than every other game in average because the games have an internal clock feature that runs 24/7, draining even more power. The day/night clock feature was removed in 3rd generation games for that reason.

Offline Eiyeron

  • Urist McEiyolobster
  • LV10 31337 u53r (Next: 2000)
  • **********
  • Posts: 1430
  • Rating: +130/-10
  • (-_(//));
    • View Profile
    • Rétro-Actif : Rétro/Prog/Blog
Re: TI-81 Screen Types?
« Reply #25 on: August 06, 2013, 11:18:24 am »
Pokemon Gold and Silver last much shorter than every other game in average because the games have an internal clock feature that runs 24/7, draining even more power. The day/night clock feature was removed in 3rd generation games for that reason.

There was a RTC in Ruby/Sapphire. They lasted ONE year.

Offline DJ Omnimaga

  • Clacualters are teh gr33t
  • CoT Emeritus
  • LV15 Omnimagician (Next: --)
  • *
  • Posts: 55935
  • Rating: +3153/-232
  • CodeWalrus founder & retired Omnimaga founder
    • View Profile
    • DJ Omnimaga Music
Re: Re: TI-81 Screen Types?
« Reply #26 on: August 06, 2013, 11:22:36 am »
Really? Wikipedia said otherwise the last time I checked (and cited dead batteries as reason why) ???

Offline Eiyeron

  • Urist McEiyolobster
  • LV10 31337 u53r (Next: 2000)
  • **********
  • Posts: 1430
  • Rating: +130/-10
  • (-_(//));
    • View Profile
    • Rétro-Actif : Rétro/Prog/Blog
Re: TI-81 Screen Types?
« Reply #27 on: August 06, 2013, 11:26:31 am »
There was a clock too. But there aren't any day/night difference. Only elapsed time for berry growing.

Offline DJ Omnimaga

  • Clacualters are teh gr33t
  • CoT Emeritus
  • LV15 Omnimagician (Next: --)
  • *
  • Posts: 55935
  • Rating: +3153/-232
  • CodeWalrus founder & retired Omnimaga founder
    • View Profile
    • DJ Omnimaga Music
Re: TI-81 Screen Types?
« Reply #28 on: August 06, 2013, 12:32:49 pm »
Yeah I read now on Wikipedia that day and night is definitively gone. I guess that still leaving a clock in for other purposes still drains the battery fast enough, though. Also the battery problems with 2nd and 3rd gen Pokémon games brings up another question that is more related to calcs: If a TI-84 Plus is left with the 4 AAA batteries removed for a long time, will the small button battery drain faster than older calcs due to the clock?

Offline CVSoft

  • LV3 Member (Next: 100)
  • ***
  • Posts: 65
  • Rating: +5/-0
    • View Profile
    • CVSoft Homepage (work in progress)
Re: TI-81 Screen Types?
« Reply #29 on: August 07, 2013, 05:05:22 am »
Well, a calc that has AAA batteries installed isn't drawing very much current from the battery, hence hence the long battery lives. Someone with the proper tools should test this quantitatively.
« Last Edit: August 07, 2013, 05:06:46 am by CVSoft »
Current projects:
Sunθ v4.0 (Solar Position Calculator) (on hold)
CBLLight/CBLTherm (TI-Z80 only)
CBLM (68k only)
--KJ6PSG