YMF740C Datasheet, PDF (14/44 Pages) List of Unclassifed Manufacturers – DS-1L

YMF740C
3Ch: Interrupt Line
Read / Write
Default: 00h
Access Bus Width: 8, 16, 32-bit
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt Line
b[7:0] ..........Interrupt Line
This register indicates the interrupt channel that INTA# is assigned to.
3Dh: Interrupt Pin
Read Only
Default: 01h
Access Bus Width: 8, 16, 32-bit
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt Pin
b[7:0] ..........Interrupt Pin
DS-1L supports INTA# only. This register is hardwired to 01h.
3Eh: Minimum Grant
Read Only
Default: 05h
Access Bus Width: 8, 16, 32-bit
b7 b6 b5 b4 b3 b2 b1 b0
Minimum Grant
b[7:0] ..........Minimum Grant
This register indicates the length of the burst period required by DS-1L.
This register is hardwired to 05h.
3Fh: Maximum Latency
Read Only
Default: 19h
Access Bus Width: 8, 16, 32-bit
b7 b6 b5 b4 b3 b2 b1 b0
Maximum Latency
b[7:0] ..........Maximum Latency
This register indicates how often DS-1L generates the Bus Master Request.
This register is hardwired to 19h.
January 14, 1999
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