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https://github.com/sehugg/8bitworkshop.git
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52 lines
3.0 KiB
NASM
52 lines
3.0 KiB
NASM
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; Telephone
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; Inspired by Adam Trionfo's Happy Birthday Music
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; http://ballyalley.com/ml/ml_homebrew/birthday.asm
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; Assemble with Zmac 1.3
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; From: https://github.com/hxlnt/astrocade
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INCLUDE "hvglib.h" ; Include HVGLIB library
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MUSICSP = $4FD2 ; Music stack pointer
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ORG FIRSTC ; Initialize at beginning of cartridge ROM area
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DB $55 ; ... with the code for a normal menued cartridge
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DW MENUST ; Initialize menu
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DW PrgName ; ... with string at PrgName
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DW PrgStart ; ... such that selecting the program enters PrgStart
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PrgName: DB "TELEPHONE" ; String to be displayed on menu
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DB 0 ; ... which must be followed by 0
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PrgStart: DI ; Disable interrupts
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SYSTEM INTPC ; Begin interpreter mode
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DO SETOUT ; Set output ports
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DB 80*2 ; ... with VBLANK line set to line 80
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DB 44/4 ; ... with color boundary 44 pixels from the left of the screen
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DB 00001000b ; ... with screen interrupts reenabled
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DO COLSET ; Set color palettes
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DW Palettes ; ... with the values at Palettes
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DO FILL ; Fill screen
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DW NORMEM ; ... starting at the beginning of screen RAM
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DW 81*BYTEPL ; ... and going for 81 lines
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DB 00000000b ; ... with a solid black (color 0) fill pattern
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DO MOVE ; Display graphic
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DW NORMEM+(38*BYTEPL)
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DW 20*BYTEPL ; ... copy 20 lines
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DW Telephone ; ... from data at location Telephone
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DO ACTINT ; Activate subtimer interrupts
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DO BMUSIC ; Play music
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DW MUSICSP ; ... using predefined music stack address
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DB 00110011B ; ... setting tone B, vibrato, noise bits
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DW Ringing ; ... with music score defined at Ringing
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EXIT ; Exit interpreter mode
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Loop: JP Loop ; Play infinite loop
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Palettes: DB $07,$FE,$FB,$00 ; Left color palette (11b, 10b, 01b, 00b)
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DB $07,$4F,$CB,$00 ; Right color palette (11b, 10b, 01b, 00b)
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Telephone: ; Telephone graphic
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INCLUDE "02-telephone.gfx"
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Ringing: ; Music score
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MASTER OA3 ;
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VOLUME $80, $00 ;
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NOTE1 60, C4 ; ... in which notes oscillate between C4
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NOTE1 60, F4 ; ... and F4
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REST 80 ; ... followed by a short rest
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NOTE1 60, C4 ; ... then another ring
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NOTE1 60, F4 ;
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REST 160 ; ... and a long rest
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JP Ringing ; ... ending in replay
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