User guide

5: Debugging
DC 900-1338I 83
When PEEKER is entered, a brief summary of the special characters is published after
the register dump:
Peek & Poke <address>[,<data>][;<b, w or l>]<p, =, n, or <return>>
R/r = dump registers
ctrl/x = return to caller
The ICP2424 has “reset” and “abort” (NMI) pushbuttons on its circuit board. Pushing
the NMI button allows you to break out of loops and gain control even if the CPU is at
level seven.
Note
If the vector table entry for Autovector 7 or the vector base register
has been corrupted, the result of pushing the NMI button is inde-
terminate.
delete Return PEEKER to its initial state
equal sign Close current location, open current location (in address
space), and display contents
l Open by longword
linefeed Control-J Close current location, open next location (in address space),
and display contents
space Close current location, open next location (in address space),
and display contents
n (next) Close current location, open next location (in address space),
and display contents
p Close current location, open previous location (in address
space), and display contents
period Ignore, but echo
r or R Publish registers and return PEEKER to initial state
<return> <esc> Close and return to initial state
tab Field delimiter between address and data
u (up) Close current location, open previous location (in address
space), and display contents
underscore Ignore, but echo
w Open by word (default)