Communicating between BASIC and asm programs
» > >
»
» View previous topic :: View next topic  
I'm running a basic program (shell..?) with two assembly programs handling two different graphical screens. How can I combine the asm programs into one while using the basic program to choose which screen to show? Thank you Graphing Calculator
Umm, what assembly programs are they? Having the code for them would be great, if possible. Thanks! Smile
It's copying the buffer to the graph screen but each program had different data to copy to the LCD.
I wanted to have a variable passed from BASIC to asm (maybe through ans?) that decided which image would be copied.

main:
b_call(_RunIndicOff)
ld hl, Main_Menu
d de, plotsscreen
ld bc, 768
ldir
ret

Main_Menu: ;full screen
.db %00000000,%00000000,%00...
That's a bit of a PITA. BASIC programs use a custom floating-point format, while the Z80 just deals in bytes, so you need to convert between the two. You can do something like this:

Code:
   bcall(_AnsName)
   bcall(_FindSym)
   ret   c   ; Not found
   and   1Fh
   cp   RealObj
   ret   nz   ; Wrong type
   b_call(_RclAns)
   b_call(_ConvDim) ; Only accepts 1-99; throws an error for 0, less than 0, or greater than 99.
   cp   1
   jr   z, DoFunction1
   cp   2
   jr   z, DoFunction2
   ...
   ; No value matches
   ret
   
DoFunction1:
   ...
   ret
   
DoFunction2:
   ...
   ret
Also, if you need numbers greater than 99, you can use _ConvOP1 rather than _ConvDim. The LSB is stored in the 'a' register, and the value up to 9999 is stored in 'de'. Just some more information if you ever need it. Smile
Thank you for your help its working. Smile
I'm pretty sure _RclAns returns the type in A, and RealObj=0 so you should be able to do:

Code:

   b_call(_RclAns)
   and $1F
   ret nz
   b_call(_ConvDim) ; Only accepts 1-99; throws an error for 0, less than 0, or greater than 99.
   ld b,a
   djnz checkfunction2
function1:
   ...
   ret
checkfunction2:
   djnz checkfunction3
function2:
   ...
   ret
checkfunction3:
   djnz checkfunction4
function3:
   ...
   ret
checkfunction4:
   .
   .
   .
   ret
Z80 Optimized Routines Repository | Z80 Float Library(GitHub) | Grammer(GitHub)
  
Register to Join the Conversation
Have your own thoughts to add to this or any other topic? Want to ask a question, offer a suggestion, share your own programs and projects, upload a file to the file archives, get help with calculator and computer programming, or simply chat with like-minded coders and tech and calculator enthusiasts via the site-wide AJAX SAX widget? Registration for a free Cemetech account only takes a minute.

» Go to Registration page
Communicating between BASIC and asm programs
»
» View previous topic :: View next topic  
Page 1 of 1
» All times are UTC - 5 Hours
 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

 

Advertisement