
ÉlanSC310 Microcontroller Evaluation Board User’s Manual
2-17
1.
0
Table 2-7. Bus Mode Selection and Affected Jumpers
ISA Mode
Provided on the ÉlanSC310 microcontroller evaluation board are two physical 16-
bit ISA bus connectors. These slots are available for use when the board is
configured for ISA mode. The ÉlanSC310 microcontroller ISA bus is a subset of
a full ISA bus. Some signals are not available, therefore some ISA cards may not
function properly on the evaluation board (refer to the ÉlanSC310 Microcontroller
Data Sheet for a detailed description of the ISA bus). The ISA bus is wait-state
programmable (refer to the ÉlanSC310 Microcontroller Programmer’s Reference
Manual for details on programming ISA bus timings).
Bus Mode
Resistor
Pack
Setting
JP16
JP17
JP18
1-2
2-3
1-2
2-3
open
closed
Full ISA
Install
RP1 &
RP2 only
N/A
N/A
Connects
IRQ3
from
Super I/O
N/A
N/A
Connects
IRQ12
from
mouse
Local Bus
Install
RP5 &
RP6 only
2x CPU
clock
N/A
Connects
IRQ3
from
Super I/O
N/A
N/A
Connects
IRQ12
from
mouse
evalbd.book : ch2 Page 17 Thursday, August 8, 1996 2:34 PM