Date   : Tue, 02 Jun 1998 11:59:40 +0100
From   : David Alan Gilbert <dg@...>
Subject: Re: boot to eprom

Gareth Clatworthy wrote:
> 

> 1) I dont want the machines on all the time so I want them to run
> code from Eprom as they power up.
> 
> could I use the *ROM format ?

Yes.

> How do I get that as the active filing system after power up ?

If your machine does NOT have disc or econet file systems then
the choice is between Tape or *ROM, *ROM is used if you Shift-Break,
which can also be acheived by setting the highest bit of the links
on the keyboard.

> How do I create the ROM image ? I have access to a programmer

There was a program published in Acorn user a few years back for this.

We used ROMFS on a machine doing medicine labels at my fathers
Pharmacy many years ago - worked a treat.
 
> 2) I will program the soundchip directly for the DTMF tones

Should be OK.
 
> 3) I would like to get the *speech code as part of the program to
> allow me to send a message like "alarm at 123 long street activated
> enter pin to cancel or next key holder will be rung"

If I remember *speech (this is the completely software one?) - it disabled
interrupts while it spoke; this may cause you problems (and completely
destroyed my attempt at a speaking clock...)

> 4) as an added extra i would like to sense dtmf tones, this may be a
> little ambitous

I'm pretty sure Maplin sell a DTMF decoder chip; bung it on the user port.

Dave

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