25 Sep
2008
25 Sep
'08
1:15 a.m.
I have a Nicolet Z80 NICE in-circuit emulator.
Unlike a logic analyzer, it MUST replace the CPU
(cannot just clip over the CPU
since some signals are asserted or blocked).
1) The 40 pin DIP's pins are on the bottom of the box
so it plugs in directly, if there's space.
If there's NOT enough space,
it comes with a ribbon cable
but with .6" 40 pin dip-PINS on both ends.
Mine came with a hand-made PCB with 2: 40 pin sockets
hand-wired together to act as a F-F adapter.
Is there are more "graceful" way to handle that,
such as a female/socket 40 pin DIP connector
directly to ribbon cable?
There are compact gender changers for DB9/DB25 RS232
connectors, why not something similar for 40 pin DIP?
2) What if the CPU is soldered to the board?
Must I desolder it entirely, or just certain pins?
Thanks!
Jeff Jonas
jeffj at panix.com
26 Sep
26 Sep
1:22 p.m.
I have a Nicolet Z80 NICE in-circuit emulator.
Unlike a logic analyzer, it MUST replace the CPU
(cannot just clip over the CPU
since some signals are asserted or blocked).
1) The 40 pin DIP's pins are on the bottom of the box
so it plugs in directly, if there's space.
If there's NOT enough space,
it comes with a ribbon cable
but with .6" 40 pin dip-PINS on both ends.
Mine came with a hand-made PCB with 2: 40 pin sockets
hand-wired together to act as a F-F adapter.
Is there are more "graceful" way to handle that,
such as a female/socket 40 pin DIP connector
directly to ribbon cable?
How long are the pins? Would one row of pins on the unit make contact
with one row of sockets on a normal 0.1*0.1 header socket (like an IDE
drive connector)? If so, consider using 2 suck sockets crimped to the
same piece of ribbon cable and use the appropriate rows of holes on eack
socket to connect each pin on the emulator to the cirrect wire of the
cable (note that with most DIL DIP plugs -- the sort of thing to go into
the target socket -- the first wire of the cable goes to pin 40, the
second to pin 1, the third to 39 and so on).
If the pins are not that long, how about using a wire-wrap 40 pin socket
to effectively lengthen them and then doing the hack with the 2 header
sockets on its pins
-tony
1:50 p.m.
2) What if the CPU is soldered to the board?
Must I desolder it entirely, or just certain pins?
I'm not sure if anyone else has replied to this...
You would be very well advised to desolder it entirely. The first time
the emulator does something that the CPU wouldn't, you could fry the
CPU. Even if the emulator just blocks certain signals, this could
affect what the CPU does next, or when it does it.
Oh, and when you put the CPU back, put it in a socket. In fact, put the
socket in first and plug the emulator into it; then don't remove the
socket when you return the CPU to service.
Philip.
5931
days inactive
5932
days old
2 comments
3 participants
participants (3)
-
ard＠p850ug1.demon.co.uk -
jeffj＠panix.com -
philip＠axeside.co.uk