SC/MP

From: Sipke de Wal <sipke_at_wxs.nl>
Date: Thu Dec 2 16:37:20 1999

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
>
>
>
Received on Thu Dec 02 1999 - 16:37:20 GMT