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7-8
PCMCIA Interface
TS102 Registers
The PCMCIA specification relies on software negotiation between the host
system and each card to configure the hardware interface. As a result of this
negotiation, some signals on the PCMCIA interface can, if required, be
redefined. This is handled via the TS102 register interface.
7.3.1
Card A and B interrupt registers
There is one 16 -bit interrupt register for each card. Each register contains
an interrupt status (read) and clear (write) bits and an interrupt mask bit for
each of four interrupt sources.
The request bit is the logical AND of the status and the mask bit, and
indicates that an interrupt is being requested. The mask bits allow masking
of individual interrupts. An interrupt is enabled when the mask is set to 1
and is cleared by writing a 1 to the associated clear bit.
The card interrupt registers also contain the soft reset flag. Setting this bit
to 1 will cause the SPARCbook 3 to be reset.
Bit
Read
Write
0
IRQ request
Clear IRQ request
1
WP status changed request
Clear WP status changed request
2
Battery status changed request
Clear Battery status changed
3
Card detect status changed
request
Clear card detect status changed
4
IRQ status
Not used
5
WP status changed status
Not used
6
Battery/card status changed status
Not used
7
Card detect status changed status
Not used
8
IRQ mask
IRQ mask
9
WP status mask
WP status mask
10
Battery/card status mask
Battery status mask
11
Card detect status mask
Card detect status mask
12
Soft reset
Soft reset
13
Not used
Not used
14
Not used
Not used
15
Not used
Not used
Table 7-5 Card Interrupt Register
S3GX_TRMBook Page 8 Friday, September 19, 1997 11:39 am
Summary of Contents for SPARCbook 3 series
Page 8: ...viii S3GX_TRMBook Page viii Friday September 19 1997 11 39 am...
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...