Microcontroller Subsystem
12-13
Command Set
0x2E
Control Diagnostic
Mode
mask
ack +
((mark_space_ratio
AND mask) EOR
value)
This command is used to control various features
used during diagnostic test of the system. By setting
the appropriate bit in this simulated "port", a
diagnostic feature is activated.
The following bit values are currently defined:
0x1
Display command interface diagnostics on
LCD.
0x2
Set keyboard and mouse ports to 9600
baud.
0x2F
Control Screen
Contrast
mask
ack + 1 byte
This command, which is only valid on the LC
system variant, is used to vary the LCD screen
contrast value between 0 and 0xFF
Opcode
Command
Argument
Returned
Function
Table 12-2 Read/Write/Modify Commands (Continued)
S3GX_TRMBook Page 13 Friday, September 19, 1997 11:39 am
Summary of Contents for SPARCbook 3 series
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Page 44: ...2 16 The SPARC CPU SBus Controller S3GX_TRMBook Page 16 Friday September 19 1997 11 39 am...
Page 76: ...5 8 SCSI Controller DMA Support S3GX_TRMBook Page 8 Friday September 19 1997 11 39 am...
Page 146: ...9 28 MODEM Class 2 Fax Command Set S3GX_TRMBook Page 28 Friday September 19 1997 11 39 am...
Page 180: ...11 30 Display Interface RAMDAC S3GX_TRMBook Page 30 Friday September 19 1997 11 39 am...
Page 216: ...Index vi S3GX_TRMBook Page vi Friday September 19 1997 11 39 am...