YMF744B ETC [List of Unclassifed Manufacturers], YMF744B Datasheet - Page 21

• Manufacturer Part Number: YMF744B
• Description: DS-1S
• Manufacturer: ETC [List of Unclassifed Manufacturers]

YMF744B
44-45h: Subsystem Vendor ID Write Register
46-47h: Subsystem ID Write Register
b[14:13] ......SBVER: SB Version Select
b15..............IMOD: Legacy IRQ mode
b[15:0] ........Subsystem Vendor ID Write Register
b[15:0] ........Subsystem ID Write Register
These bits set the version of the SB Pro DSP. The value set in these bits is returned by sending the E1h
DSP command.
The legacy interrupt protocol is selected with IMOD and SIEN. Refer to the explanation of SIEN bit.
This register sets the Subsystem Vendor ID that is read from 2C-2Dh (Subsystem Vendor ID register).
The default value is the YAMAHA Vendor ID, 1073h. IHVs must change this ID to their Vendor ID in
the BIOS POST routine.
In case EEPROM connects externally, this register is invalid, and do not reflect to Subsystem Vendor ID.
This register sets the Subsystem ID that is read from 2E-2Fh (Subsystem ID register).
The default value is the DS-1S Device ID, 0010h. IHVs must change this ID to their ID in the BIOS
POST routine.
In case EEPROM connects externally, this register is invalid, and do not reflect to Subsystem ID.
b15
b15
“0”:
“1”:
“2”:
“3”:
Read / Write
Default: 1073h
Access Bus Width: 16-bit
Read / Write
Default: 0010h
Access Bus Width: 16-bit
b14
b14
ver 3.01
ver 2.01
ver 1.05
reserved
b13
b13
b12
b12
b11
b11
(default)
b10
b10
Subsystem Vendor ID Write
b9
b9
Subsystem ID Write
-21-
b8
b8
b7
b7
b6
b6
b5
b5
b4
b4
b3
b3
February 3, 1999
b2
b2
b1
b1
b0
b0