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Calculator Community => TI Calculators => Axe => Topic started by: Link on August 28, 2012, 06:40:25 pm

Title: Turn off Calc and Exit Program in Axe?
Post by: Link on August 28, 2012, 06:40:25 pm: Well, been playing around with Axe for a month or so, and was wondering if there's a way to turn off the calculator and exit the program? Is there some sort of axiom or asm technique to do that?
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Deep Toaster on August 28, 2012, 06:58:48 pm: :Asm(FDCB1696) :Return

The first line tells the calculator to power off when the program exits, and the second line exits the program. (If you are in a subroutine when you run this, you should use Return^r instead of Return.)

Spoiler For Spoiler:
The first line actually tells the OS that the batteries are too low to run... Seems to work anyway :P
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Link on August 28, 2012, 07:02:33 pm: Brilliant! Thanks, really appreciate it!
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Deep Toaster on August 28, 2012, 07:10:35 pm: Edited my post (Runer112 pointed some stuff out over IRC).
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Hayleia on August 30, 2012, 09:22:17 am: Quote from: Deep Thought on August 28, 2012, 06:58:48 pm
:Asm(FDCB1696) :Return

The first line tells the calculator to power off when the program exits, and the second line exits the program. (If you are in a subroutine when you run this, you should use Return^r instead of Return.)

Spoiler For Spoiler:
The first line actually tells the OS that the batteries are very low... Seems to work anyway :P
It doesn't work with zStart when the program is set on startup D:
(however, it works when launched from homescreen :))
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Xaychru04 on October 07, 2012, 03:55:01 pm: Wow, we can do a lot of things including pure assembly in an axe program !
I wanted to do a screen saver one month ago with axe but I didn't know how to launch it automaticly...
Anyway, I don't think it's possible to tell the OS to launch the program automaticly ^^
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: shmibs on October 07, 2012, 04:38:22 pm: /me is curious about this as well.
what would one have to do to make a program that automatically launches after a given amount of time, regardless of whether or not there is any user input? would modifying the os to add in a bit of code executed during interrupts work?
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: thepenguin77 on October 07, 2012, 09:07:36 pm: This sounds like a job for OFFSCRPT.

OFFSCRPT.8xv (appVar) gets copied to $8001 every time the calculator turns off. This catches both 2ND + ON as well as APD. So instead of going to APD, it can just display your screen saver.

Here's what your OFFSCRPT would look like:
Code: [Select]
.org $8001 bit 4, (iy + 8) ret z ;this was a purposeful turn off ;do whatever you want, here's an example if you want to run an axe program ld hl, axeName rst 20h bcall(_executePrgm) ;when you are done, you have two options ret ;this will turn the calculator off bcall(_jForceCMDNoChar) ;this will turn the calculator on axeName: .db protProgObj, "AXEPROG", 0

I realize this isn't exactly an axe answer, but, this is what must be done.
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Xaychru04 on October 08, 2012, 01:20:17 pm: I found a French tutorial that explains how to program in hexadecimal (I'm french), but it seems pretty difficult O.o
@thepinguin77: I've never used assembly but I'll try as soon as I can access to an emulator :)
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Matrefeytontias on October 08, 2012, 01:27:51 pm: @Xaychru04 ah ... that's mine ;D As far as I know, I wrote the only French hex tutorial (well, I never found another one, and you can believe that I searched).
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Xaychru04 on October 08, 2012, 04:45:20 pm: Yes, it was yours, and it's an excellent tutorial !
I will test programming in hexadecimal on an emulator too because I don't know if an error can just clear the RAM like Axe ( xD ) or can corrupt the memorry etc...
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Matrefeytontias on October 09, 2012, 01:43:35 am: Thanks :)

And yeah, you'd better program on an emulator, even if there is only a small chance of doing something else than a RAM clear (but there's still a chance ;) ).
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: bored_student on November 21, 2012, 10:58:18 am: Quote
OFFSCRPT.8xv (appVar) gets copied to $8001 every time the calculator turns off. This catches both 2ND + ON as well as APD. So instead of going to APD, it can just display your screen saver.

My OFFSCRPT always crashs the calc. The code is copied to $8001 and executed. But every times it reaches bcall(_jForceCMDNoChar) the calculator simply doesn't react anymore

I leaved the
bit 4, (iy + 8 )
out because this way the bit is set always and my code is never executed
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Matrefeytontias on November 27, 2012, 10:04:49 am: Up,

thepenguin77, are you sure that your code will work assuming that the OS disables the LCD before calling OFFSCRPT ?
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: thepenguin77 on November 27, 2012, 12:41:35 pm: Quote from: bored_student on November 21, 2012, 10:58:18 am
Quote
OFFSCRPT.8xv (appVar) gets copied to $8001 every time the calculator turns off. This catches both 2ND + ON as well as APD. So instead of going to APD, it can just display your screen saver.

My OFFSCRPT always crashs the calc. The code is copied to $8001 and executed. But every times it reaches bcall(_jForceCMDNoChar) the calculator simply doesn't react anymore

I leaved the
bit 4, (iy + 8 )
out because this way the bit is set always and my code is never executed

The OS does not disable the LCD before calling OFFSCRPT.

Quote from: bored_student on November 21, 2012, 10:58:18 am
Quote
OFFSCRPT.8xv (appVar) gets copied to $8001 every time the calculator turns off. This catches both 2ND + ON as well as APD. So instead of going to APD, it can just display your screen saver.

My OFFSCRPT always crashs the calc. The code is copied to $8001 and executed. But every times it reaches bcall(_jForceCMDNoChar) the calculator simply doesn't react anymore

I leaved the
bit 4, (iy + 8 )
out because this way the bit is set always and my code is never executed

Post the code, that's the only way I can tell what's wrong with it. Also, bit 4, (iy + 8) is the APD flag. I do RET Z because the code you're looking at was for a screensaver, and you wouldn't want a screen saver to run if you were turning the calculator off on purpose.
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Matrefeytontias on November 27, 2012, 12:47:08 pm: As FloppusMaximus said here (http://www.cemetech.net/forum/viewtopic.php?p=195738#195738) :

Quote from: FloppusMaximus
Well...

- Before calling OFFSCRPT, the OS turns the LCD off and disables all interrupts (via port 3.)
[...]
- GetKey halts the CPU, which freezes the system since interrupts have been disabled.
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: thepenguin77 on November 27, 2012, 12:56:52 pm: Quote from: Matrefeytontias on November 27, 2012, 12:47:08 pm
As FloppusMaximus said here (http://www.cemetech.net/forum/viewtopic.php?p=195738#195738) :

Quote from: FloppusMaximus
Well...

- Before calling OFFSCRPT, the OS turns the LCD off and disables all interrupts (via port 3.)
[...]
- GetKey halts the CPU, which freezes the system since interrupts have been disabled.

Well, then I am wrong ;D You've convinced me to go disassemble the mechanism that calls OFFSCRPT because I guess I don't actually know where it is.
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Matrefeytontias on November 27, 2012, 01:11:07 pm: I tried to turn back the LCD on in OFFSCRPT :

Code: [Select]
.org $8001 ld a,3 out ($10),a ret .end
It effectively turned the LCD on ... but then freezed O.o
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: thepenguin77 on November 27, 2012, 01:24:45 pm: Well, the problem here is that your code was not actually being run. I forgot, but OFFSCRPT copies one too few bytes (which is why it starts at $8001 btw). So, when you make your call to bcall(_createAppvar), just increase the size by one.
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: Matrefeytontias on November 27, 2012, 01:46:51 pm: Yay, I got it working !

This code, when turning the calc off by any mean, keeps the LCD on until you press [clear].

Code: [Select]
.org $8001 ld a,3 out ($10),a loop: ld a,$FD out (1),a in a,(1) bit 6,a ret z jr loop .end
I assume that it may be possible to run an Axe program as thepenguin77 said above but adding the two first lines of my code.
Title: Re: Turn off Calc and Exit Program in Axe?
Post by: bored_student on December 03, 2012, 09:51:22 am: My problem was that the display turned off and I didn't notice the calculator was nevertheless turned on.

I will try it once again as soon as I have a bit more time x.x