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Created page with "AYM The AYM format stores same music as AY-format. Original description of format describes CPC and ZX AY ports emulation only. But AY Emulator additionally is emulating ZX be..."
AYM
The AYM format stores same music as AY-format. Original description of format describes CPC and ZX AY ports emulation only. But AY Emulator additionally is emulating ZX beeper port. Before AY_Emul, AYM format was supporting only by one program is RDOSPLAY (OPL2/OPL3 chip music player).
Roman Dolejsi (roman@sorry.vse.cz) designed the AYM format. Next is slightly edited text from RDOSPLAY.TXT.
-------Begin----------
name size pos info
'AYM0' dword 00 identifier (AY Music, format revision 0)
name db 28 04 music name
author db 16 20 music author name
init word 30 music init entry (A = music number)
play word 32 interrupt player entry
musmin byte 34 min music number
musmax byte 35 max music number (musmax - musmin = number of musics)
muspos byte 36 starting music number
regpos byte 37 reg in which musnum is stored when entering init (00-0B)
AFreg word 38 AF register before entering init routine
BCreg word 3A BC register
DEreg word 3C DE register
HLreg word 3E HL register
IXreg word 40 IX register
IYreg word 42 IY register
blocks byte 44 number of memory blocks
from pos 45h, rest of the file contains memory blocks each carrying this:
begin word b+00 where in the memory this block begins (64k addr space)
size word b+02 how long is this block
bdata [size] b+04 block of Z80 music code data for AY-3-8910 (currently for ZX128 envir.: FFFD=Ctrl, BFFD=Data, and for Amstrad CPC envir.: F6=Switch, F4=Ctrl/Data)
-------End----------
The AYM format stores same music as AY-format. Original description of format describes CPC and ZX AY ports emulation only. But AY Emulator additionally is emulating ZX beeper port. Before AY_Emul, AYM format was supporting only by one program is RDOSPLAY (OPL2/OPL3 chip music player).
Roman Dolejsi (roman@sorry.vse.cz) designed the AYM format. Next is slightly edited text from RDOSPLAY.TXT.
-------Begin----------
name size pos info
'AYM0' dword 00 identifier (AY Music, format revision 0)
name db 28 04 music name
author db 16 20 music author name
init word 30 music init entry (A = music number)
play word 32 interrupt player entry
musmin byte 34 min music number
musmax byte 35 max music number (musmax - musmin = number of musics)
muspos byte 36 starting music number
regpos byte 37 reg in which musnum is stored when entering init (00-0B)
AFreg word 38 AF register before entering init routine
BCreg word 3A BC register
DEreg word 3C DE register
HLreg word 3E HL register
IXreg word 40 IX register
IYreg word 42 IY register
blocks byte 44 number of memory blocks
from pos 45h, rest of the file contains memory blocks each carrying this:
begin word b+00 where in the memory this block begins (64k addr space)
size word b+02 how long is this block
bdata [size] b+04 block of Z80 music code data for AY-3-8910 (currently for ZX128 envir.: FFFD=Ctrl, BFFD=Data, and for Amstrad CPC envir.: F6=Switch, F4=Ctrl/Data)
-------End----------