2 Dec
1999
2 Dec
'99
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