Speccy #04 29 февраля 1996

Программирование     Звук

Programming - How to musical accompaniment in the derivation of the cartoon.

       PROGRAMMING


 Many users ZX-Spectrum, who have mastered the package
programs "Animation" constantly
asked the same question.
 How to connect your musical accompaniment in the derivation of 
the cartoon? 

 For those who have a computer with
48Kb of RAM. Connection ringtones
involves great difficulties.
If multrolik take all the free space of RAM, then insert
musical accompaniment will be
impossible.

 In this respect, very good
chances are users
computers with more RAM 128kb.i.
Musical accompaniment to these computers can be made to
any manufactured your cartoons, in addition you can load into 
memory at once several blocks.


 It will be seen as
almost osushestvit output
movie with music.

Velichutin NV


 The program below will help anyone who wants to conclude
multrolika accompanied by playing music.

 Limitations:
1. The presence of at least 128 kb. RAM
2. The presence of the musical process
   Sor.

 The program, which we now
consider, the melody is loaded
in the 4 th page of memory, but users will, of course, can use 
any other page 

 Address the initialization of melody and
address given for playing
music editor ASM 1.12.
Note to Editors and Sound Tracker
Pro Tracker addresses should be replaced, respectively, at 
49,152 and 49158. You can replace these

addresses and in the final compiled block by placing the 
address initialization tunes at 25002 and the address of 
playing tunes at 25,004. For example Basic'a ​​of this can be 
done typing the POKE 25002,0:

POKE 25003,192: POKE 25004,6: POKE
25005.192.

 Address program start 25000.


START EQU 33150; address start

                   ; Multrolika
BUF EQU 25344; buffer address

                   ; Move on

                   ; Vector transformation
                   ; Closing the
BANK EQU 23388; syst. re
                   ; Mennaya number

                   ; Page RAM


       ORG 25000


       JR BEGIN

MISIN DEFW 49163; address INIC.

                   Song and
MUSIC DEFW 49166; address Player
                   ; Closing the chalk.

BEGIN LD HL, (MUSIN)

       LD (MUS1 +1), HL

       LD (MUS2 +1), HL

       LD HL, (MUSIC)

       LD (MUS3 +1), HL


       LD A, 20; connect

       LD (BANK), A; 4 pages of RAM

       LD BC, # 7FFD; record in

       OUT (C), A; in port
MUS1 CALL 49163; initialized
                     ; Zatsiya ME
                     ; Lodii

       LD BC, # 7FFD; connect

       LD A, 16, 0 pages of RAM

       LD (BANK), A

       OUT (C), A

       CALL IM2ON; include

                     ; Interrupt

                     2-order

       CALL START; launch

                    ; Multrolika

       CALL IM2OFF; include

                     ; Interrupt

                     , 1 of the first kind

       LD BC, # 7FFD

       LD A, 20

       LD (BANK), A

       OUT (C), A
MUS2 CALL 49163

       LD BC, # 7FFD

       LD A, 16

       LD (BANK), A

       OUT (C), A

       RET

; Handling routine PRAIRIE; VANY 2 of the first kind.

; Work of the subprogramme can be, but divided into 5 parts:
; 1.Sohranenie values ​​on the stack
; All CPU registers
; 2.Pereklyuchenie page RAM
; 3.Proigryvanie ringtones
; 4.Pereklyuchenie page RAM
; 5.Vosstanovlenie all values
; Processor registers

OBRIM2 DI

       PUSH HL

       PUSH DE

       PUSH BC

       PUSH IX

       PUSH IY

       EXX

       PUSH HL

       PUSH DE

       PUSH BC

       PUSH AF

       EX AF, AF '

       PUSH AF

       LD BC, # 7FFD; switch
       LD A, 20; chenie page

       OUT (C), A; RAM

       PUSH BC
MUS3 CALL 49166; losing
                     ; Of melody.

       POP BC; switch
       LD A, 16; chenie page

       OUT (C), A; RAM

       POP AF

       EX AF, AF '

       POP AF

       POP BC

       POP DE

       POP HL

       EXX

       POP IY

       POP IX

       POP BC

       POP DE

       POP HL

       EI

       JP # 0038, switching to

                     ; Cluster survey
                     ; Viatury and

                     ; Return

                     ; Primary

                     ; Program

; PROGRAMME ON interruption; equations second kind.

; In this program, initially under; be compiled buffer for the 
transition, yes to interrupt vectors. ; Preparation of such a 
buffer necessary, go for computers in which; ryh volatile data 
bus. ; Set interrupt vector; tions to the address of the buffer.

; Since the transition will be Implemented; vlyatsya at # FFFF 
then , This address is entered byte # 18

; (JR), and the relative transition
; # F3 taken from PZU.V address this, the phase transition is 
stored byte # C3 ; (JP) and further address routines

; Interrupt handling.

IM2ON DI; ban prairie.

       LD HL, BUF; a buffer for
       LD DE, BUF +1; carry a number of

       LD BC, # 0100; # FF - Address

       LD (HL), # FF; move on

       LDIR; vekt.preryv.

       LD A, # 18; code JR

       LD (# FFFF), A; to address

       LD A, # C3; code JP

       LD (# FFF4), A; to address

       LD HL, OBRIM2; transition to

       LD (# FFF5), HL; Subprogramme.

                    ; Obr.preryv.

       LD A, # 63, is established.

       LD I, A; vector

                    ; Interrupt

       IM 2, includes

                    ; Interrupt

                    2-order

       EI

       RET

; PROGRAMME ON interruption; equations first order.

IM2OFF DI

       LD A, # 3F; establishes
       LD I, A; Vai vector

                   ; Interrupt

       IM 1; include

                   ; Interrupt

                   , 1 of the first kind

       EI

       RET
 Sleduyushey placed on the page
code block of the program. To
use to copy the screen to prepare and compile music at
49152, and of course to make himself
multrolik.



 I hope that the above
program will do multroliki bolle attractive.


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