Need even more ASM help. - Cemetech | Forum | Technology & Calculator Open Topic [Topic]

olav_nordmann
Member (Posts: 131)

Need even more ASM help.
08 Jul 2008 12:28:57 pm

I need a complete ASM program listing that:

1. Read BASIC variable X into a register
2. Archive BASIC Program "ABC"
3. Unarchive BASIC Program "DEF"
4. Run BASIC Program "DEF"

olav_nordmann
Member (Posts: 131)

10 Jul 2008 06:55:15 am

So NOBODY is able to help me on this? I REALLY need the help I can get. I can't seem to find ANYTHING about how to read a BASIC Variable to register A on the internett.

So I would be very, very, very happy if ANYBODY would help me on this, thanks.

KermMartian
Site Admin (Posts: 64057)

10 Jul 2008 07:44:08 am

Here you go, I missed the topic the first time around:

Code:

Start:


;First we move the contents of X to the accumulator


   bcall(_zerooop1)


   ld hl,op1+1


   ld (hl),'X'          ;or any other var


   bcall(_rclvarsym)          ;op1 / op2 -> value


   bcall(_convop1)


   ld a,e


;in theory you'll want to use the accumulator now


;now archive program ABC


   ld hl,ProgABC


   rst 20h         ;mov9tooop1


   bcall(_chkfindsym)


   ret c            ;if carry is set, does not exist


   ld a,b


   or a            ;is it in RAM?


   bcallz(_arc_unarc)   ;only archive if not already archived


;now unarchive program DEF


   ld hl,ProgDEF


   rst 20h         ;mov9tooop1


   bcall(_chkfindsym)


   ret c            ;if carry is set, does not exist


   ld a,b


   or a            ;is it in RAM?


   bcallnz(_arc_unarc)   ;only unrchive if not already in RAM


;now execute program DEF.


;I'm giving you a much, much simpler version of this than DCS uses


   ld hl,ProgDEF


   rst 20h         ;mov9tooop1


   bcall(_getK)      ;this eliminates any residual keypresses


   bit ProgExecuting,(iy+NewDispf)


   push af


   set ProgExecuting,(iy+NewDispf)


   bcall(_parseImp)              ;Run the program!


   pop af


   jr nz,FinishExec


   res ProgExecuting,(iy+NewDispf)


FinishExec:                   ;all done running the BASIC program!


   ret


Prog_ABC:


   .db 5,"ABC",0


Prog_DEF:


   .db 5,"DEF",0

olav_nordmann
Member (Posts: 131)

10 Jul 2008 09:15:17 am

Thanks, that was what I need.

How do you figure all of that by the way?

KermMartian
Site Admin (Posts: 64057)

10 Jul 2008 09:16:52 am

olav_nordmann wrote:

Thanks, that was what I need.

How do you figure all of that by the way?

I just examined the TI documentation. That's bits of code from DCS4 and DCS6.

olav_nordmann
Member (Posts: 131)

10 Jul 2008 09:21:22 am

There is like thousands of system calls for the calculators, why couldn't TI make just 32 well documented general purpose calls, as the first IBM PC uses?

When I read the TI documention, I have to seek for years to find the commands I would need...

b-flat
1
Advanced Member (Posts: 225)

10 Jul 2008 10:11:52 am

Well, you rarely need most of the commands; If you read through a guide like learn ASM in 28 days, you will probably learn all of the commands that you are likely to need. For most commands, it's not that hard to write your own routine anyway...

Basically, the only ones you will want are:
Displaying text / numbers
possibly getkey, but custom getkey is actually much easier to use
system variable management (archiving / unarchiving, etc)
runindicoff/runindicon
clearing the screen, etc

However, if you do more, then you might need some of the math routines they have...

But the point is that in general, you will be writing the routines you need by yourself, not using a lot of built in routines.

magicdanw
Advanced Member (Posts: 282)

10 Jul 2008 11:19:06 am

olav_nordmann wrote:

When I read the TI documention, I have to seek for years to find the commands I would need...

I often don't know what system calls I need for a particular problem. I generally take the assembly coder's approach: Break it down. I split the problem up into the logical segments, and keep splitting it up until there is a system routine that will do one part, or it's simple enough for me to write my own routine to do one part.

olav_nordmann
Member (Posts: 131)

10 Jul 2008 01:22:27 pm

That's for general ASM programs. The special routines I needed here was for interacting with BASIC programs, and that's typically not what people commonly use.

b-flat wrote:

Well, you rarely need most of the commands; If you read through a guide like learn ASM in 28 days, you will probably learn all of the commands that you are likely to need. For most commands, it's not that hard to write your own routine anyway...

Basically, the only ones you will want are:
Displaying text / numbers
possibly getkey, but custom getkey is actually much easier to use
system variable management (archiving / unarchiving, etc)
runindicoff/runindicon
clearing the screen, etc

However, if you do more, then you might need some of the math routines they have...

But the point is that in general, you will be writing the routines you need by yourself, not using a lot of built in routines.