User`s guide

Vector ZCB Single Board canputer
2.2.2 MWRITE enable/disable
Jumper area: 0
Connections as manufactured: jlll'llf'ler installed
Function: when connected, the ZCB board will generate the MWRITE signal
(S-IOO line 68). You will want to disconnect this jLnTlper if there is some
other source of MWRITE in the system, such as a front panel.
Options: if r+1RITE generation is not wanted, cut the jumper in area D.
2.2.3 Automatic WArT state disable/enable
Jumper area: N
Connections as manufactured: pads 1 and 2 are jumpered (wait on MI)
Function: When enabled, this options permits the automatic generation of
WAIT states according to the following. When pads 1 and 3 of jLnTlper area N
are jumpered, no automatic wait states are enabled. When pads 1 and 2 are
jumpered, an automatic wait state is inserted only after the Ml machine
cycle. If no pads are jumpered, one automatic wait state is inserted on
every bus cycle
Options: TO insert one wait state after every bus cycle, cut the jumper
between pads 1 and 2. To disable wait state generation by the ZCB board cut
the jumper be~en pads 1 and 2 and install a jumper be~n pads 1 and 3.
2.3 EPIm/RAM SECTIOO
The Vector Graphic ZCB Single Board Computer presents the user with
unprecedented flexibility in EPRCM type dlOice and address selection. You
can choose from 2708, 2716 or 2732 type EPRCl4s, giving the user fran 3K to
12K bytes of EPRCM on the single board. The EPROM type chosen directly
determines the addressing schen:e used. See the appropriate section below
for the EPRCM type you have chosen.
See appendix section for iIrtp:.xtant imfonnation regarding PRCM address ing on
current ZCB boards.
2-2
Rev. I-B 6/11/80