MirrorRepos
/
RomWBW
mirror of https://github.com/wwarthen/RomWBW.git
1
0
Fork 1
Code Issues Projects Releases Wiki Activity
Browse Source

ym2612 minors

pull/313/head
b1ackmai1er 3 years ago
parent
bb2a68e066
commit
d9f11b9f5e
3 changed files with 123 additions and 81 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 94
      Source/Apps/VGM/vgmplay.asm
  2. 46
      Source/Apps/VGM/vgmplay.txt
  3. 32
      Source/HBIOS/ym2612.asm

94
Source/Apps/VGM/vgmplay.asm
View File

@ -39,13 +39,11 @@ MBC .equ 4
;
plt_romwbw .equ 1 ; Build for ROMWBW?
plt_type .equ sbcecb ; Select build configuration
debug .equ 0
debug .equ 0 ; Display port, register, config info
;
#IF (plt_type=custom)
RSEL .equ 0D8H ; Primary AY-3-8910 Register selection
RDAT .equ 0D0H ; Primary AY-3-8910 Register data
RSEL .SET 09AH ; Primary AY-3-8910 Register selection
RDAT .SET 09BH ; Primary AY-3-8910 Register data
RSEL .equ 09AH ; Primary AY-3-8910 Register selection
RDAT .equ 09BH ; Primary AY-3-8910 Register data
RSEL2 .equ 88H ; Secondary AY-3-8910 Register selection
RDAT2 .equ 89H ; Secondary AY-3-8910 Register data
VGMBASE .equ $C0
@ -105,8 +103,8 @@ plt_cpuspd .equ 7 ; Non ROMWBW cpu speed default
#ENDIF
;
#IF (plt_type=sbcecb)
RSEL .equ 0D8H ; Primary AY-3-8910 Register selection
RDAT .equ 0D0H ; Primary AY-3-8910 Register data
RSEL .equ 09AH ; Primary AY-3-8910 Register selection
RDAT .equ 09BH ; Primary AY-3-8910 Register data
RSEL2 .equ 0A0H ; Secondary AY-3-8910 Register selection
RDAT2 .equ 0A1H ; Secondary AY-3-8910 Register data
VGMBASE .equ $C0
@ -203,7 +201,7 @@ RTCIO .equ 070H
#DEFCONT \ djnz $-6
;------------------------------------------------------------------------------
; VGM Codes
; VGM Codes - see vgmrips.net/wiki/VGM_specification
;------------------------------------------------------------------------------
VGM_GG_W .equ 04FH ; GAME GEAR PSG STEREO. WRITE DD TO PORT 0X06
@ -280,32 +278,41 @@ _S1 LD DE, VGMDATA + 34H
LD (VGMPOS), HL
LD HL,D60 ; VGM delay (60hz)
LD (VGMDLY), HL
LD (vdelay), HL
;
LD IX,VGM_DEV ; IX points to device mask
;
;------------------------------------------------------------------------------
; Play loop
;------------------------------------------------------------------------------
;
MAINLOOP CALL PLAY ; Play one frame
;
LD HL,KEYCHK ; Check for keypress
DEC (HL)
JR NZ,NO_CHK
;
LD C,6 ; Every 256 commands
LD E,0FFH
CALL BDOS
LD E,0FFH ; because HBIOS calls
CALL BDOS ; take a long time
OR A
JR NZ,EXIT
NO_CHK:
#IF (delay_type==cpu_loop)
LD HL,(VGMDLY) ; Frame delay
vdelay: .equ $+1
ld hl,vdelay
fdelay: .equ $+1
lp1: LD B,FRAME_DLY ; 44100 one frame = 0.0000226757 seconds
DJNZ $
DEC HL
LD A,H
OR L
JR NZ,lp1
JP NZ,lp1 ; Normally NZ so jp is faster
#ENDIF
;
#IF (delay_type==ctc_poll)
LD HL,(VGMDLY) ; Frame delay
vdelay: .equ $+1
ld hl,vdelay ; Frame delay
lp1: in a,(ctcch3) ; wait for counter to reach zero
dec a
jr nz,lp1
@ -321,13 +328,13 @@ lp3: in a,(ctcch3) ; wait for counter to reach zero
DEC HL
LD A,H
OR L
JR NZ,lp1
JP NZ,lp1 ; Normally NZ so jp is faster
#ENDIF
;
#IF (delay_type==ctc_int)
#ENDIF
;
JR MAINLOOP
JP MAINLOOP
;
;------------------------------------------------------------------------------
; Program Exit
@ -687,7 +694,6 @@ PLAY
#IFDEF SBCV2004
CALL SLOWIO
#ENDIF
LD IX,VGM_DEV
LD HL, (VGMPOS) ; Start processing VGM commands
NEXT LD A, (HL)
INC HL
@ -704,13 +710,7 @@ NEXT LD A, (HL)
JR NEXT
NEXT1:
; CP VGM_GG_W ; Game Gear SN76489 stereo. Ignored
; JR NZ, PSG
; LD IX,VGM_DEV
; SET 0,(IX+1)
; INC HL
; JR NEXT
;
; SN76489 SECTION
PSG CP VGM_PSG1_W ; Write byte to SN76489.
@ -750,9 +750,9 @@ AY1 OUT (RSEL), A
OUT (RDAT), A
SET 3,(IX+0)
JR NEXT
;
; YM2612 SECTION
;
YM2162_1 CP VGM_YM26121_W
JR NZ, YM2162_2
LD A,(HL)
@ -774,9 +774,9 @@ YM2162_2 CP VGM_YM26122_W
INC HL
SET 4,(IX+0) ; 2nd channel
JP NEXT
;
; YM2151 SECTION
;
YM2151_1 CP VGM_YM21511_W
JR NZ,YM2151_2
LD A,(HL)
@ -789,7 +789,7 @@ YM2151_1 CP VGM_YM21511_W
JP NEXT
;
YM2151_2 CP VGM_YM21512_W
JR NZ,WAITNN
JR NZ,GG
LD A,(HL)
OUT (YM2151_SEL2),A
INC HL
@ -799,6 +799,14 @@ YM2151_2 CP VGM_YM21512_W
SET 7,(IX+0)
JP NEXT
;
; GAME GEAR SN76489 STEREO SECTION
;
GG: CP VGM_GG_W ; Stereo steering port value
JR NZ, WAITNN
; SET 0,(IX+1)
INC HL
JP NEXT
;
WAITNN CP VGM_WNS ; Wait nn samples
JR NZ, WAIT60
LD A, (HL)
@ -808,35 +816,43 @@ WAITNN CP VGM_WNS ; Wait nn samples
LD (VGMPOS), HL
LD L, A
LD H, D
LD (VGMDLY), HL
LD (vdelay), HL
RET
;
WAIT60 CP VGM_W735 ; Wait 735 samples (60Hz)
JR NZ, WAIT50
LD (VGMPOS), HL
LD HL, D60
LD (VGMDLY), HL
LD (vdelay), HL
RET
;
WAIT50 CP VGM_W882 ; Wait 882 samples (50Hz)
WAIT50: CP VGM_W882 ; Wait 882 samples (50Hz)
JR NZ, WAIT1
LD (VGMPOS), HL
LD HL, D50
LD (VGMDLY), HL
LD (vdelay), HL
RET
;
WAIT1 CP 70H ; WAIT 0-15 SAMPLES
WAIT1: CP 70H ; WAIT 0-15 SAMPLES
JR C, UNK ; CODES 70-7FH
CP 80H
JP NC, UNK
SUB 6FH
LD L, A
LD H, 0
LD (VGMDLY), HL
LD (vdelay), HL
RET
;
UNK: SET 0,(IX+1) ; unknown device
INC HL ; Try and skip
#IF (debug)
ld a,'u' ; Display unknow command
call PRTCHR
call PRTDOT
call PRTHEX
ld a,' '
call PRTCHR
#ENDIF
JP NEXT
;
;------------------------------------------------------------------------------
@ -1277,7 +1293,7 @@ MSG_MBC .DB " [mbc] ",0
;------------------------------------------------------------------------------
;
VGMPOS .DW 0
VGMDLY .DW 0
;VGMDLY .DW 0 ; Saves number of frames to delay
KEYCHK .DB 0 ; Counter for keypress checks
;
VGM_DEV .DB %00000000 ; IX+0 Flags for devices

46
Source/Apps/VGM/vgmplay.txt
View File

@ -7,28 +7,28 @@ Usage:
VGMPLAY MUSIC[.VGM]
Supported devices:
Press a key to exit the program.
Supported devices
=================
SN76489
AY-3-89810
YM2612/YM3484
YM2151
Default Ports:
Supported platforms
===================
D8H-D0H - First AY-3-8910 (RSEL/RDAT)
A0H-A1H - Second AY-3-8910
FFH - First SN76489
FBH - Second SN76489
C6H-C7H - YM2612/YM3484
VGM Player is currently being developed on the ROMWBW platform using the Retrobrew computers
EBC-SBC-V2 (Z80), ECB-SCG (AY-3-8910) and ECB-VGM (YM2612 and 2xSN76489) board.
It can be configured to run with other hardware such as RC2014, P8X180 and nhyodyne MBC.
If your system uses different ports you need to recompile the source.
VGM files can be very big and are limited in size by the available TPA space, which is typically 52k.
Note: The player should be compatible with VGM files up to version 1.51
but there are very few controls (if any) in the code, be sure to have
a good VGM file that doesn't contain much extra data. These files can be
very big, the player is limited to the available TPA space which is
typically around 52k.
Processor speed affects the playback speed. Under ROMWBW the player will detect the cpu speed configuration
and adjust timing loops. For other platforms, default speeds are configured but may need to be changed
to suit your hardware. Counter/Timer hardware may be supported in future.
Example Music Files
===================
@ -53,4 +53,22 @@ INCHINA.VGM - YM2612 * Double Dragon 3: The Rosetta Stone: In Chin
* Included in disk images
Original Source by J.B Langston, Marco Maccaferri, Ed Brindley. ROMWBW version by Phil Summers.
VGM sources
===========
https://www.smspower.org/forums/15359-VGMPacksGameGearMegaCollection
https://vgmrips.net/packs/chip/ym2612
https://project2612.org/
VGM Tools
=========
https://vgmrips.net/wiki/VGMTool
https://github.com/vgmrips/vgmtools
References
==========
http://www.primrosebank.net/computers/mtx/tools/PD/vgmplayer.zip - Paul Daniels MTX SN76489 interrupt version with embedded VGM tune.
https://github.com/jblang/SN76489/blob/master/examples/vgmplayer.asm - J.B. Langston RC2014 polled version with file loading.
https://groups.google.com/g/rc2014-z80/c/9nHnETJzGKU - Marco Maccaferri P8X180 & AY-3-8910 support
https://github.com/electrified/rc2014-ym2151/tree/main/software/vgmplay - Ed Brindly RC2014 & YM2151 support
ROMWBW version by Phil Summers. VGM Player is still in development. The ECB-VGM is also still under development.

32
Source/HBIOS/ym2612.asm
View File

@ -4,10 +4,15 @@
;
;------------------------------------------------------------------------------
; References:
; https://hiddenpalace.org/News/Sega_of_Japan_Sound_Documents_and_Source_Code
; https://www.smspower.org/maxim/Documents/YM2612
; https://plutiedev.com/blog/20200103
; https://www.plutiedev.com/ym2612-registers
; https://www.plutiedev.com/ym2612-operations
; https://en.wikipedia.org/wiki/Scientific_pitch_notation
; https://gendev.spritesmind.net/forum/viewtopic.php?t=2915 (1)
; http://nemesis.hacking-cult.org/MegaDrive/Documentation/YM2608J.PDF
;
;------------------------------------------------------------------------------
; Octave range is A#0-B7+3/4 HBIOS note 0..343
;------------------------------------------------------------------------------
@ -24,14 +29,15 @@ YM2DAT .EQU VGMBASE+03H ; Secondary YM2162 11000011 a1=1 a0=1
YM_TONECNT .EQU 6 ; Count number of tone channels
YM_NOISECNT .EQU 0 ; Count number of noise channels
;
YM_PENDING_PERIOD .DW 0 ; PENDING PERIOD (12 BITS) ; ORDER
YM_PENDING_VOLUME .DB 0 ; PENDING VOL (8 BITS) ; SIGNIFICANT
YM_PENDING_PERIOD .DW 0 ; PENDING PERIOD (12 BITS)
YM_PENDING_VOLUME .DB 0 ; PENDING VOL (8 BITS)
YM_PENDING_DURATION .DW 0 ; PENDING DURATION (16 BITS)
YM_READY .DB 0 ; BIT 0 -> NZ DRIVER IS READY TO RECEIVE PLAY COMMAND
; BIT 1 -> NZ EXECUTING WITHIN TIMER HANDLER = DO NOT DIS/ENABLE INT
YM_RDY_RST .DB 0 ; FLAG INDICATES IF DEVICE IS IN READY (NZ) OR RESET STATE (Z)
YM_DEBUG .EQU 0 ; CHANGE TO 1 TO ENABLE DEBUGGING
YM_RSTCFG .EQU 0 ; SET TO 1 FOR FULL REGISTER CLEAR
YM_FAST3438 .EQU 0 ; FAST CPU'S WITH A YM3438 MAY REQUIRE A DELAY
;
;------------------------------------------------------------------------------
; Driver function table and instance data
@ -111,9 +117,11 @@ t_loop: ld a,(hl) ; get register to write
#ENDIF
;
dec c ; point back to RSEL port
ld b,0 ; check device
nready1: in a,(c) ; ready with timeout
rlca ;
ld b,0 ;
nready1:
#IF YM_FAST3438==1) \ cp (ix) \ #ENDIF \ ; ym3438 delay (1)
in a,(c) ; check device
rlca ; ready with timeout
jr nc,ready1 ; bits 7 = busy
djnz nready1
;
@ -397,7 +405,7 @@ ym_playcmd09: .db $F0 ; [0] KEY ON
.db $00 ; End flag
;
;------------------------------------------------------------------------------
; Quarter semitone values
; Quarter semitone F-Number values for frequency
;------------------------------------------------------------------------------
;
ym_notetable: .dw 644 ; C ; 152
@ -497,14 +505,14 @@ ym_cfg_ready: .db part0, 2/2
.db $46, $7F
;
.db part0, 6/2
.db $4C, $7f ;$00 ; Channel 1-3
.db $4d, $7f ;$00 ; Max volume for operator 4
.db $4e, $7f ;$00
.db $4C, $00 ; Channel 1-3
.db $4d, $00 ; Max volume for operator 4
.db $4e, $00
;
.db part1, 6/2
.db $4C, $7f ;$00 ; Channel 4-6
.db $4d, $7f ;$00 ; Max volume for operator 4
.db $4e, $7f ;$00
.db $4C, $00 ; Channel 4-6
.db $4d, $00 ; Max volume for operator 4
.db $4e, $00
;
.db part0, 6/2
.db $5C, $1F ; Channel 1-3

Write Preview
Loading…
Cancel
Save