Oric computers, A/D Converter

I received an A/D converter from Belgium today. It was made by a company
called All Tronics from Belgium.
Has anyone heard of that company before? Apparently they produced all kinds
of add-ons for the Oric.
On the box you can see that they made the following:
I/O Box
VIA Card
Joystick I/F
A/D module
Buffler (what is that???)
Clock unit
Cmos/Eprom
80 Columns
Extension unit
CP/M

The A/D Module is very good in quality but unfortunately there was no
operating manual included.
It is based on the ADC0808CCN and is plugged into the expansion port. Does
anyone know how it works?

Regards
Hakan Karlsson

Hi Han.

The A/D module can be used for data acquisition. For example, to capture the
analog signal from a temperature sensor and convert this signal in digital
data that the Oric can processing. I think that the A/D module can be used
as sound digitizer too, but you need a controller program for these tasks.

For information about ADC0808 visit
http://www.national.com/pf/AD/ADC0808.html

Cheers.

Alfonso.


"Han Karlsson" < XXXX@XXXXX.COM > escribien el mensaje
>>I received an A/D converter from Belgium today. It was made by a company >> called All Tronics from Belgium. >> Has anyone heard of that company before? Apparently they produced all >> kinds >> of add-ons for the Oric. >> On the box you can see that they made the following: >> I/O Box >> VIA Card >> Joystick I/F >> A/D module >> Buffler (what is that???) >> Clock unit >> Cmos/Eprom >> 80 Columns >> Extension unit >> CP/M >> >> The A/D Module is very good in quality but unfortunately there was no >> operating manual included. >> It is based on the ADC0808CCN and is plugged into the expansion port. Does >> anyone know how it works? >> >> Regards >> Hakan Karlsson >> >>

"Silicebit." < XXXX@XXXXX.COM > a rit dans le message de

Hi there too :-)

Your Analog to Digital converter shouldn't be hard to use from the Oric once you
have deciphered the address decoder part...
There might be two different schemes:

- one output port (from the Oric view) where you select which entry you want to
sample (one among eight), and one input port port where you read the sampled
analog value (with a 8-bit resolution). It is possible that both ports are
located at the same address, since one is an input and the other an output...

OR

- eight input ports, the low part of the address being used to drive the
multiplexer part of the ADC.

If you don't want to decipher the address decoding stage by looking at the PCB,
you may find which address range is used by the extension with a series of PEEK
instructions: with no disk controller attached, try every PEEK(#03x0) from 0300
to 03F0; the one that doesn't return 191 (#BF) should tell you the address-range
start. Then PEEK following addresses and compare them with a PEEK of the
adresses 0300-030F (well, beware of the addresses 0304-0309 because they are
timer related and so they always change contents), to determine the end of the
address range...
Otherwise, please scan the PCB so that we can have a look at your nice
acquisition acquisition :-)

Cheers,

Fabrice

Any chance of scanning the box so we can see the advert?

Twilighte

I will take some photos of it and put on my page this week.

Han

"Twilighte" < XXXX@XXXXX.COM > skrev i meddelandet

That's strange, Hakan's initial post didn't appear here...

If you scan the PCB too, we might try to guess how it works... :-)

Cheers,

Fabrice

PS: Hakan, did you receive my mail (long ago) with the USB module article ?


dc3ach$nsd$ XXXX@XXXXX.COM ...

> If you scan the PCB too, we might try to guess how it works... :-)
Will do that.

Yes, I did. have not had any time to work with it though. Been to busy
moving.
Fabrice, can you please mail me the modified rom also.

Han

The pictures are now up on my page.

Han