Setting The General-Purpose Software-Readable Header (J17); Figure 1-2. General-Purpose Software-Readable Header - Motorola MVME2300 Series Installation And Use Manual

Automatic System

Setting the General-Purpose Software-Readable Header (J17)

Header J17 provides eight readable jumpers. These jumpers can be read as
a register at ISA I/O address $801 (hexadecimal). Bit 0 is associated with
header pins 1 and 2; bit 7 is associated with pins 15 and 16.
The bit values are read as a
the jumper is removed. The MVME2300 is shipped from the factory with
J17 set to all
The PowerPC firmware, PPCBug, reserves all bits, SRH0 to SRH7.
Bit 0 (SRH0)
Bit 1 (SRH1)
Bit 2 (SRH2)
Bit 3 (SRH3
Bit 4 (SRH4)
Bit 5 (SRH5)
Bit 6 (SRH6)
Bit 7 (SRH7)

Figure 1-2. General-Purpose Software-Readable Header

1-11
J16
1
2
3
System Controller
Controller
0
s (jumpers on all pins), as shown in Figure 1-2.
0
J17
1
)
15
Preparing the MVME2300 Hardware
J16
1
2
3
System Controller Disabled
when the jumper is installed, and as a
PPCBug INSTALLED
Reserved for future use
2
Reserved for future use
Reserved for future use
Reserved for future use
Reserved for future use
Reserved for future use
Reserved for future use
16
Reserved for future use
J16
1
2
3
when
1
1