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vgminfo v1.1: Add YM3812 (OPL2) and YMF262 (OPL3) detection support

pull/635/head
jduraes 2 months ago
parent
b55d7a3f72
commit
5237595822
2 changed files with 227 additions and 20 deletions
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  1. 245
      Source/Apps/VGM/vgminfo.asm
  2. 2
      Source/Apps/VGM/vgminfo.txt

245
Source/Apps/VGM/vgminfo.asm
View File

@ -40,6 +40,8 @@ LF .equ 0AH ; line feed
; VGM Header offsets
;------------------------------------------------------------------------------
DEBUG_SUM .equ 1 ; 1 = build with checksum support
VGM_IDENT .equ 00H ; "Vgm " identifier
VGM_VERSION .equ 08H ; Version
VGM_SN76489_CLK .equ 0CH ; SN76489 clock (4 bytes, little-endian)
@ -60,6 +62,9 @@ VGM_YM26123_W .equ 0A2H ; YM2612 #2 port 0 write
VGM_YM26124_W .equ 0A3H ; YM2612 #2 port 1 write
VGM_YM21511_W .equ 054H ; YM2151 write
VGM_YM21512_W .equ 0A4H ; YM2151 #2 write
VGM_OPL2_W .equ 05AH ; YM3812 (OPL2) write
VGM_OPL31_W .equ 05EH ; YMF262 (OPL3) port 0 write
VGM_OPL32_W .equ 05FH ; YMF262 (OPL3) port 1 write
VGM_AY_W .equ 0A0H ; AY-3-8910 write
VGM_ESD .equ 066H ; End of sound data
VGM_WNS .equ 061H ; Wait n samples
@ -74,6 +79,9 @@ VGM_W882 .equ 063H ; Wait 882 samples
START: LD SP, STACK ; Setup stack
; Parse command tail for debug flags (e.g. "D" or "/D")
CALL PARSE_DEBUG
; Display header
LD DE, MSG_HEADER
CALL PRTSTR
@ -224,6 +232,27 @@ PRINT_NAME: LD A, (HL)
LD A, ' '
CALL PRTCHR
#if DEBUG_SUM
; Compute and optionally print 512-byte checksum over VGMBUF
CALL CALC_SUM512
LD A, (DBG_SUM)
OR A
JR Z, PAD_DONE
; Print space + [HHLL] + space between filename and chips
LD A, ' '
CALL PRTCHR
LD A, '['
CALL PRTCHR
LD A, (SUM_HI)
CALL PRTHEX8
LD A, (SUM_LO)
CALL PRTHEX8
LD A, ']'
CALL PRTCHR
LD A, ' '
CALL PRTCHR
#endif
PAD_DONE:
@ -316,6 +345,14 @@ CHK_AY_CLK:
LD (CHIP_TYPES), A
START_CMD_SCAN:
; Clear AY flags if AY is not present in header
LD A, (CHIP_TYPES)
BIT 3, A ; Check if AY is present
JR NZ, SCAN_CMDS ; If present, continue
LD A, (CHIP_FLAGS)
AND 3FH ; Clear bits 6 and 7 (AY flags)
LD (CHIP_FLAGS), A
SCAN_CMDS:
; If chip type is present, scan commands to detect multiples
; Set base flags from types
LD A, (CHIP_TYPES)
@ -335,19 +372,14 @@ NO_YM2612_BASE:
LD A, (CHIP_TYPES)
BIT 2, A
JR Z, NO_YM2151_BASE
LD A, (CHIP_FLAGS)
OR 10H ; Set YM2151 #1
LD (CHIP_FLAGS), A
; Do NOT pre-mark YM2151 as used from the header alone.
; YM2151 will only be marked used when a command is seen.
NO_YM2151_BASE:
LD A, (CHIP_TYPES)
BIT 3, A
JR Z, NO_AY_BASE
LD A, (CHIP_FLAGS)
OR 40H ; Set AY #1
LD (CHIP_FLAGS), A
; Do NOT pre-mark AY as used from the header alone.
; AY will only be marked used when an 0xA0 command is seen.
NO_AY_BASE:
; Compute absolute data start within VGMBUF window
COMPUTE_DATA_START:
LD HL, (VGMBUF+VGM_DATAOFF)
LD A, H
OR L
@ -379,10 +411,13 @@ SCAN_LOOP: LD A, (HL)
CHK_PSG2: CP VGM_PSG2_W
JP NZ, CHK_YM2612
LD A, (CHIP_TYPES) ; Only if SN76489 is present
BIT 0, A
JR Z, SCAN_NEXT_1
LD A, (CHIP_FLAGS)
OR 02H ; bit 1 = SN #2
LD (CHIP_FLAGS), A
INC HL
SCAN_NEXT_1: INC HL
JP SCAN_NEXT
CHK_YM2612: CP VGM_YM26121_W
@ -393,10 +428,13 @@ CHK_YM2612: CP VGM_YM26121_W
JR Z, GOT_YM2612_2
CP VGM_YM26124_W
JP NZ, CHK_YM2151
GOT_YM2612_2: LD A, (CHIP_FLAGS)
GOT_YM2612_2: LD A, (CHIP_TYPES) ; Only if YM2612 is present
BIT 1, A
JR Z, SCAN_NEXT_2
LD A, (CHIP_FLAGS)
OR 08H ; bit 3 = YM2612 #2
LD (CHIP_FLAGS), A
INC HL
SCAN_NEXT_2: INC HL
INC HL ; Skip 2 data bytes
JP SCAN_NEXT
GOT_YM2612_1: LD A, (CHIP_FLAGS)
@ -410,10 +448,13 @@ CHK_YM2151: CP VGM_YM21511_W
JR Z, GOT_YM2151_1
CP VGM_YM21512_W
JP NZ, CHK_AY
LD A, (CHIP_TYPES) ; Only if YM2151 is present
BIT 2, A
JR Z, SCAN_NEXT_3
LD A, (CHIP_FLAGS)
OR 20H ; bit 5 = YM2151 #2
LD (CHIP_FLAGS), A
INC HL
SCAN_NEXT_3: INC HL
INC HL
JP SCAN_NEXT
GOT_YM2151_1: LD A, (CHIP_FLAGS)
@ -424,23 +465,46 @@ GOT_YM2151_1: LD A, (CHIP_FLAGS)
JP SCAN_NEXT
CHK_AY: CP VGM_AY_W
JP NZ, CHK_WAIT
JP NZ, CHK_OPL2
LD A, (CHIP_TYPES) ; Only if AY is present
BIT 3, A
JR Z, SCAN_SKIP_AY ; Skip if AY not present in header
LD A, (HL) ; Get register/chip byte
BIT 7, A ; Bit 7 = chip 2?
JR Z, GOT_AY1
LD A, (CHIP_FLAGS)
OR 80H ; bit 7 = AY #2
LD (CHIP_FLAGS), A
INC HL
INC HL
JP SCAN_NEXT
JR SCAN_SKIP_AY
GOT_AY1: LD A, (CHIP_FLAGS)
OR 40H ; bit 6 = AY #1
LD (CHIP_FLAGS), A
INC HL
SCAN_SKIP_AY: INC HL
INC HL ; Skip 2 data bytes
JP SCAN_NEXT
CHK_OPL2: CP VGM_OPL2_W
JP NZ, CHK_OPL3
; Mark OPL2 present
LD A, (CHIP_TYPES)
OR 010H ; bit 4 = OPL2
LD (CHIP_TYPES), A
INC HL ; skip register
INC HL ; skip data
JP SCAN_NEXT
CHK_OPL3: CP VGM_OPL31_W
JR Z, GOT_OPL3
CP VGM_OPL32_W
JP NZ, CHK_WAIT
GOT_OPL3: ; Mark OPL3 present
LD A, (CHIP_TYPES)
OR 020H ; bit 5 = OPL3
LD (CHIP_TYPES), A
INC HL ; skip register
INC HL ; skip data
JP SCAN_NEXT
CHK_WAIT: CP VGM_WNS
JR NZ, CHK_W735
INC HL
@ -519,6 +583,28 @@ YM2151_DUAL: LD DE, MSG_YM2151X2
CALL PRTSTR
YM2151_DONE: INC B
NO_YM2151:
; OPL2 (YM3812)
LD A, (CHIP_TYPES)
BIT 4, A
JR Z, NO_OPL2
LD A, B
OR A
CALL NZ, PRINT_COMMA
LD DE, MSG_OPL2
CALL PRTSTR
INC B
NO_OPL2:
; OPL3 (YMF262)
LD A, (CHIP_TYPES)
BIT 5, A
JR Z, NO_OPL3
LD A, B
OR A
CALL NZ, PRINT_COMMA
LD DE, MSG_OPL3
CALL PRTSTR
INC B
NO_OPL3:
; AY-3-8910
LD A, C
AND 0C0H ; bits 6-7
@ -552,6 +638,118 @@ PRINT_COMMA: LD A, ','
RET
;------------------------------------------------------------------------------
; Parse CP/M command tail for debug flag (D or /D) -> sets DBG_SUM
;------------------------------------------------------------------------------
PARSE_DEBUG: LD HL, BUFF ; CP/M command tail buffer
LD A, (HL) ; length byte
OR A
RET Z ; empty tail, no flags
LD B, A ; B = remaining chars
INC HL ; HL -> first character
PD_LOOP: LD A, (HL)
CP ' ' ; skip spaces
JR Z, PD_NEXT
CP '/'
JR Z, PD_SLASH
CP 'D'
JR Z, PD_SET
CP 'd'
JR Z, PD_SET
JR PD_NEXT
PD_SLASH: ; look at next char for D/d
INC HL
DJNZ PD_CHECK2
RET
PD_CHECK2: LD A, (HL)
CP 'D'
JR Z, PD_SET
CP 'd'
JR Z, PD_SET
JR PD_NEXT_CONT
PD_NEXT: INC HL
PD_NEXT_CONT: DJNZ PD_LOOP
RET
PD_SET: LD A, 1
LD (DBG_SUM), A
RET
;------------------------------------------------------------------------------
; 512-byte checksum over VGMBUF (simple 16-bit sum)
;------------------------------------------------------------------------------
CALC_SUM512: PUSH AF
PUSH BC
PUSH DE
PUSH HL
LD HL, VGMBUF
LD DE, 0200H ; 512 bytes
XOR A
LD (SUM_LO), A
LD (SUM_HI), A
SUM_LOOP: LD A, (HL)
INC HL
LD B, A
LD A, (SUM_LO)
ADD A, B
LD (SUM_LO), A
LD A, (SUM_HI)
ADC A, 0
LD (SUM_HI), A
DEC DE
LD A, D
OR E
JR NZ, SUM_LOOP
POP HL
POP DE
POP BC
POP AF
RET
;------------------------------------------------------------------------------
; Print A as two hex digits
;------------------------------------------------------------------------------
PRTHEX8: PUSH AF
PUSH BC
LD B, A ; Save original byte in B
SRL A
SRL A
SRL A
SRL A ; High nibble
CALL PRTHEX_NIB
LD A, B
AND 0FH ; Low nibble
CALL PRTHEX_NIB
POP BC
POP AF
RET
PRTHEX_NIB: CP 0AH
JR C, HEX_DIGIT
ADD A, 'A' - 10
JR PRTHEX_OUT
HEX_DIGIT: ADD A, '0'
PRTHEX_OUT: CALL PRTCHR
RET
;------------------------------------------------------------------------------
; Print string pointed to by DE (terminated by 0)
;------------------------------------------------------------------------------
@ -611,6 +809,8 @@ MSG_YM2612: .DB "YM2612", 0
MSG_YM2612X2: .DB "2xYM2612", 0
MSG_YM2151: .DB "YM2151", 0
MSG_YM2151X2: .DB "2xYM2151", 0
MSG_OPL2: .DB "YM3812", 0
MSG_OPL3: .DB "YMF262", 0
MSG_AY8910: .DB "AY-3-8910", 0
MSG_AY8910X2: .DB "2xAY-3-8910", 0
MSG_UNKNOWN: .DB "Unknown/None", 0
@ -638,6 +838,11 @@ CHIP_FLAGS: .DB 0 ; Detected chip flags
CHIP_TYPES: .DB 0 ; Chip types present from header
; bit0 SN76489, bit1 YM2612
; bit2 YM2151, bit3 AY-3-8910
; bit4 OPL2 (YM3812), bit5 OPL3 (YMF262)
SUM_LO: .DB 0 ; Low byte of 16-bit checksum
SUM_HI: .DB 0 ; High byte of 16-bit checksum
DBG_SUM: .DB 0 ; 0=disable checksum print, non-zero=enable
; Buffer for VGM header + first data sector (256 bytes)
VGMBUF: .FILL 512, 0

2
Source/Apps/VGM/vgminfo.txt
View File

@ -32,6 +32,8 @@ The program can detect the following audio chips:
- SN76489 (PSG - Programmable Sound Generator)
- YM2612 (FM Synthesis chip used in Sega Genesis/Mega Drive)
- YM2151 (OPM - FM Operator Type-M)
- YM3812 (OPL2 - FM synthesis chip)
- YMF262 (OPL3 - Enhanced FM synthesis chip)
- AY-3-8910 (PSG used in many arcade and home computers)
Example Output:

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