Vector Graphic Bitstreamer II, Руководство пользователя

Страница: 12 / 54

TTL
(input =
1 'ITL
load; output drives 5
TTL
loads).
8 input, 8 output for each channel.
+5 VDC, +12 VDC, -12 VDC, and GND are also provided
for each channel.
Over l00K bytes/second.
Optional. Has 34-pin female connector and 34-line
ribbon cable. No connector is at the other end,
allowing user to configure as required. Must be
ordered separately.
If you are using the USARTs on the board as sources
of interrupts, you cannot use the output side of
Parallel O1annel A for normal parallel output.
Interrupts can be generated fram any combinaton of
the 3 USART RxRDY's, 3 TxRDY' s, and a 55 Hz real time
clock. Jumper pads provided. None prewired.
Output to parallel channel A selects (masks) interrupt
sources previously wired in.
Dummy input from Parallel Channel
a
resets 55 Hz real
t~e clock interrupt line during an interrupt service
routine. However, Parallel Channel B can be used for
normal input (and output) as well.
Can use 8080, 280 Mode 0, 280 r~de I, or 280 Mode 2
A Bitstreamer II board can generate one of 9 possible
bytes in response to an interrupt, including
three of the restart instructions for use wi th 8080
and Z80 Mode 0 interrupts. Software polls to
determine which possible source on a Bi tstreamer II
board is the actual source of the interrupt.
S-100 interrupt bus Pads are provided for jumpering interrupt sources to
the S-100 VI lines.
+8 Vdc @ 720 mA typical.
+16 Vdc @ 30
IDA
typical.
-16 Vdc
@
30 IDA typical.