Re: New bit of hardware...

[Colin Piggot]

Edwin wrote:
> I guess you will be using the microcontroller to translate SAMs
> (latched) Z80 Address/data bus to readable output on the
> display. Right ?

Nope. I just decode one I/O port and then configure the microcontroller to
use a Parallel Slave Port so it can accept bytes written to it - with the
usual /Chip-Select, /Read and /Write style signals. The software I knocked
up for the microcontroller looks at the byte when one arrives and decides
what to do with it. If it's a non-ASCII value it will perform set sequences
of command and data instructions to the LCD display for functions such as
clear display, clear line etc, or if the byte is an ASCII value it's sent to
the LCD as a data instruction.

Colin
=
Quazar : Hardware, Software, Spares and Repairs for the Sam Coupe
1995-2007 - Celebrating 12 Years of developing for the Sam Coupe
Website: http://www.samcoupe.com/

Re: New bit of hardware...

[Edwin Blink]

Came up with a new piece of hardware today.


Looks like we have similar ideas(hooking displays to SAM I mean).
A couple of weeks ago I made a single resistor (or wire) mod to sams 
parallel port
So A LCD compatible display can be added to SAMs parallel port with just 
using a cable.


http://home.orange.nl/edwin.blink/samcoupe/hardware/lcd/PLED-display.JPG

Instead of a LCD I used a 2x20 PLED display I had lying around for quite a 
while.
PLED displays have better brightnes/contrast then LCD displays. But they are 
a bit

harder to get because of a shortage.


Put together quickly with a bit of logic decoding and a microcontroller.


I guess you will be using the microcontroller to translate  SAMs (latched) 
Z80 Address/data bus

to readable output on thr display. Right ?

Edwin