Setting bit RSTP in the .i.VSC; .i.status/control register; puts the EPC-2 in
the .i.soft reset state;. In this state the .i.RUN LED; is not illuminated, the
screen is blank, and the .i.keyboard; and front-panel .i.reset switch; are
inoperable. Only having another module clear RSTP or assert the VXI
.i.SYSRESET; line, or doing a power off/on cycle (allowing 10 seconds or more in
the off state to avoid damage to the disk drive) will remove the EPC-2 from this
soft reset state.
Four conditions cause a full hardware reset of the EPC-2:
ù
SYSRESET signal (when enabled in the .i.VSC; .i.status/control register;)
ù
Front-panel reset switch
ù
Expiration of the .i.watchdog timer; when bit WDTR in the .i.MSC;
.i.module status/control register; is set
ù Power
on
EPC-2AM Interface
The EPC-2AM is an optional one-slot adapter module that permits the addition of
a standard .i.PCbus add-in card; to an EPC-2. The full complement of signals
available in a standard 8-bit PC slot are not available, however. The signals
available are listed below.
SD(0-7)
SA(0-19)
BALE
T/C
-IOR
-IOW
-SMEMR
-SMEMW
-IOCHK
IOCHRDY
REFRESH
CLK
OSC
-0WS
RESETDRV
AEN
IRQ3
IRQ4 (connected to EPC-2's IRQ7 in the revised
EPC-2 and IRQ12 in previous versions)
DRQ2 (connected to EPC-2's DRQ0)
-DACK2 (connected to EPC-2's -DACK0)
.i.DMA channels;The last three notes mean, for instance, that interrupt IRQ4 as
seen by the PC card will actually be IRQ7 as seen by the EPC-2 software. The
implication is that 8-bit PC cards that can be configured to use IRQ3 and no DMA
channel will work without change, but use of the other interrupt or the DMA
channel will probably require a change to the card's driver software.
Environmental and Electrical Specifications
.i.electromagnetic
compatibility;.i.altitude;.i.humidity;.i.shock;.i.vibration.i.temperature;.i.ope
rating temperature;.i.non-operating temperature;.i.cooling;.i.power
consumption;The following represent an EPC-2 with 8 MB of memory and an 80387
coprocessor. They do not include the EXM module in an EPC-2x.
Characteristics Specifications
Temperature
Operating
5 to 55øC at point of entry of forced air
Non-operating
-40 to 60øC
Cooling
For 10øC rise, airflow of 2 liters per second against
0.014 mm H2O backpressure
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