Print Page - calling to the program basic from assembler

Title: calling to the program basic from assembler
Post by: Fran123 on 12:41, 14 April 23

Hello

I have a BASIC program in &170 address. I want to invoque it from ASM code. How can I do it?

Thank you.

Title: Re: calling to the program basic from assembler
Post by: pelrun on 13:32, 14 April 23

There's no simple way of doing that. Check out the March 89 issue of Amstrad Computer User for the gory details if you must.

Amstrad Computer User 52 (https://acpc.me/ACME/LITTERATURE_REVUES/%5BENG%5DENGLISH_UK/%5BENG%5D%5BAMSTRAD%5DAMSTRAD_COMPUTER_USER/AMSTRAD_COMPUTER_USER_52%5BOCR%5D.pdf)

Title: Re: calling to the program basic from assembler
Post by: MoteroV4 on 13:34, 14 April 23

From BASIC you had to make a CALL to the ASM code. You just need to come back with a RET.

Title: Re: calling to the program basic from assembler
Post by: Longshot on 16:53, 15 April 23

Hello.
Try with this ... ;)

Code Select

CALL #B900
SCF
JP #EA7B

Title: Re: calling to the program basic from assembler
Post by: McArti0 on 21:25, 16 April 23

:D pressing buttons on the keyboard

Code Select

call &bd19 ;wait v-sync
ld a,2
ld (&b8bF),a ;set scan keyboard two interrupt after v-sync
call &bd19 ;wait v-sync

ld a,255-4
ld (&b645),a     ;pressed R

call &bd19 ;wait v-sync
ld (&b644),a     ;pressed U

call &bd19 ;wait v-sync
ld a,255-64
ld (&b644),a     ;pressed N

call &bd19 ;wait v-sync
ld (&b63F),a     ;pressed ENTER

RET ;return to BASIC

possible GOTO 123

Title: Re: calling to the program basic from assembler
Post by: McArti0 on 23:03, 16 April 23

>:( correction

Code Select

org #4000

call &bd19 ;wait v-sync
ld a,3
ld (&b8bF),a ;set scan keyboard two interrupt after v-sync

call &bd19 ;wait v-sync
halt
ld a,255-4
ld (&b645),a 	;pressed R

call &bd19 ;wait v-sync
halt
ld (&b644),a 	;pressed U

call &bd19 ;wait v-sync
halt
ld a,255-64
ld (&b644),a 	;pressed N

call &bd19 ;wait v-sync
halt
ld (&b63F),a 	;pressed ENTER

RET ;return to BASIC

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General Category => Programming => Topic started by: Fran123 on 12:41, 14 April 23