Wait State Jumper - Measurement Computing CIO-DIO96 User Manual

CIO-DIO96 User's Guide
Disregard the numbers printed on the switch
When setting the base address, refer to the numbers printed in white on the printed circuit board.
Hex Range Function
000-00F 8237 DMA #1
020-021 8259 PIC #1
040-043 8253 TIMER
060-063 8255 PPI (XT)
060-064 8742 CONTROLLER (AT)
070-071 CMOS RAM & NMI MASK (AT)
080-08F DMA PAGE REGISTERS
0A0-0A1 8259 PIC #2 (AT)
0A0-0AF NMI MASK (XT)
0C0-0DF 8237 #2 (AT)
0F0-0FF 80287 NUMERIC CO-P (AT)
1F0-1FF HARD DISK (AT)
200-20F GAME CONTROL
210-21F EXPANSION UNIT (XT)
238-23B BUS MOUSE
23C-23F ALT BUS MOUSE
270-27F PARALLEL PRINTER
2B0-2BF EGA
You can set the base address switch to any address in the range of 000-3F8. If you are not using IBM
prototyping cards or another board which occupies these addresses, 300-31Fh are also free to use.
Addresses not specifically listed, such as 390-39Fh, are not reserved and may be available. Check your
computer for other boards which may use I/O addresses.

Wait state jumper

The CIO-DIO96 board has a wait state jumper which you can set to enable an on-board wait state generator. A
wait state is an extra delay injected into the processor's clock via the bus. This delay slows down the processor
when the processor addresses the CIO-DIO96 board, so that signals from slow devices (chips) are valid.
The jumper is shown in
The wait state generator is only active when the CIO-DIO96 is being accessed. Your PC will not be slowed
down in general by using the wait state.
Because all PC expansion board buses are slowed to either 8 MHz or 10 MHz, the wait state generally is not
required. If you experience sporadic failures, try enabling the wait state generator.
PC I/O Address Summary
Figure 2 configured for OFF (wait state is disabled).
O
N
Figure 2. Wait state jumper
Hex Range
2C0-2CF
2D0-2DF
2E0-2E7
2E8-2EF
2F8-2FF
300-30F
310-31F
320-32F
378-37F
380-38F
3A0-3AF
3B0-3BB
3BC-3BF
3C0-3CF
3D0-3DF
3E8-3EF
3F0-3F7
3F8-3FF
O
F
F
WAIT
STATE
10
Installing the CIO-DIO96
Function
EGA
EGA
GPIB (AT)
SERIAL PORT
SERIAL PORT
PROTOTYPE CARD
PROTOTYPE CARD
HARD DISK (XT)
PARALLEL PRINTER
SDLC
SDLC
MDA
PARALLEL PRINTER
EGA
CGA
SERIAL PORT
FLOPPY DISK
SERIAL PORT