Z80 Emulator Processor; 9900 Emulator Processor - Tektronix 8001A Installation Manual

Emulator Processor Modules
10-4
Jumpers for a reduced clock rate are provided below position 5180. As supplied, the cycle
time is 1 µsec. The upper jumper cut and wired to the left will yield a 1.4 µsec cycle time.
Both jumpers wired to the left will yield a 1.6 µsec cycle time.
The jumper between positions (2100 and 2110) can be used to disable the resident RAM
function. Cutting this jumper and connecting the pad below (2110) to ground inhibits the
RAM. See Fig. 10-3 for jumper location.
ZSO Emulator Processor
Jumpers
Two jumpers are located on the Z80A Emulator Processor module. Both jumpers are present
to allow the Z80A Emulator Processor to operate with either the present version of
Program Memory, or a new, fast version of Program Memory. See Fig. 10-4.
If the Z80A Emulator Processor is operated at speeds exceeding 2 MHz by the prototype
clock (modes 1 and 2), or at 4 MHz with the internal clock (mode 0), and the slow version
of Program Memory is being used, J2 must be removed. Removing J2 adds two wait cycles
during every Program Memory access. In mode 0 operations, the internal clock may be
switched to 2 MHz by removing jumper J 1. If the fast version of program memory is used
then jumper J 1 may be installed to set the internal clock to 4 MHz and jumper J2 should
be installed.
9900 Emulator Processor
Jumpers
When the 9900 Emulator Processor module is used with the standard version of the 16k
Program Memory, one wait state must be inserted during each memory access. A jumper
is provided on the 9900 Emulator Processor module for this function. The faster version of
the 16k Program Memory will not require the added wait state except in the debug mode
when a wait state is added automatically by software.
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8001/8002 Installation Guide