1 Dec
1999
1 Dec
'99
11:48 a.m.
Hallo,
While looking for info on the SC/MP developing system from National i stumbled on this
message from Alisson J Parent.:
On May 30, 12:24, Allison J Parent wrote:
Subject: Re: National SC/MP data
<Hi all,
<Today I bought a SC/MP wirewrapped board. Does anyone know of a site
with
<data sheet? My search came up with what is known
as "SC/MP II",
including
<description of a "MK14" project in
Practical Electronics mag. In
<particular, the chip on my board requires an unknown neg. voltage on pin
<40, instead of +5 Volts on the later NMOS versions. The actual part No.
is
<ISP-8A/500D
Some time ago i found one of these systems. It also included the original datasheets from
National. It says that the voltage on pin 40 must be -7Volt.
When you need more info i can send you a scan of the datasheets.
Unfortunately my system doesn't function. So i'm looking for the scematics.
Maybe you can help me out?
Greetings,
Danny Van Braband
Belgium
2 Dec
2 Dec
11:37 a.m.
ISP 8A/500D = SC/MP1
Needs +5v Vcc & -7v Vgg
Maximum clock Freq = 1MHZ
ISP 8A/600D = SC/MP2
Needs +5v Vcc & GND (0v)
Maximum clock Freq = 4Mhz internally divided by 2 so eff. 2Mhz
Some control signals are negatively asserted IE: NBREQ vs BREQ on
SC/MP1
SC/MP 1 & 2 are fully code compatible.
I'm still working on gathering datasheets of old processors
like SC/MP 8008, 4004, 4040 8080 etc. I will put the on
a website soon.
I'm also buzzy coding a SC/MP emulator.
I'll keep you posted via this list
Grtz,
Sipke de Wal
Netherlands
Danny Van Braband wrote:
Hallo,
While looking for info on the SC/MP developing system from National i
stumbled on this message from Alisson J Parent.:
On May 30, 12:24, Allison J Parent wrote:
Subject: Re: National SC/MP data
<Hi all,
<Today I bought a SC/MP wirewrapped board. Does anyone know of a
site
with
<data sheet? My search came up with what is
known as "SC/MP II",
including
<description of a "MK14" project in
Practical Electronics mag. In
<particular, the chip on my board requires an unknown neg. voltage
on pin
<40, instead of +5 Volts on the later NMOS
versions. The actual part
No.
is
<ISP-8A/500D
Some time ago i found one of these systems. It also included the
original datasheets from National. It says that the voltage on pin
40 must be -7Volt.
When you need more info i can send you a scan of the datasheets.
Unfortunately my system doesn't function. So i'm looking for the
scematics. Maybe you can help me out?
Greetings,
Danny Van Braband
Belgium
8973
days inactive
8974
days old
1 comments
2 participants
participants (2)
-
danny.vanbraband＠yucom.be -
sipke＠wxs.nl