Atom ROMs

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Boydie
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Atom ROMs

Post by Boydie » Sun Jan 21, 2018 6:15 pm

I've finally got round to imaging the expansion eproms in my Atoms. I would have expected the 3 Econet roms to have been identical, but they're not so there may be some eprom degradation going on...

ISTR being told in the early 90s that FP is some sort of floating point extension to Basic. ONLI allegdedly stands for Online Basic, but I really don't know.

No idea what the Mystery rom does - it's only a 2516
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IanS
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Re: Atom ROMs

Post by IanS » Sun Jan 21, 2018 6:45 pm

Anyone know Paul Bond from the Econet Roms

Code: Select all

 :   *
 :   * Copyright (c) Paul Bond
 :   *      1981     Topexpress Ltd
 :   *               1 Portugal Place
 :   *               Cambridge CB5 8AF
 :   *               England
 :   *               Tel CAMB 65128
Do you know if they work?
Seems to be Econet 2.40 ("04.2 TENOCE" near the start of the roms)

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hoglet
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Re: Atom ROMs

Post by hoglet » Sun Jan 21, 2018 6:48 pm

MYSTERY is certainly new to me.

It contains the following commands I think:
START
KILL
RQIN
RCLK
HANGUP
DEFPORT
PORT
TIME
COLOUR
XADC
TIME
PORT
REACT

HANGUP, so maybe a modem ROM?

ONLI also contains those same commands.

Econet 1 and 3 are the same, Econet 2 looks like pin D7 is stuck at 0.

Dave

Boydie
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Re: Atom ROMs

Post by Boydie » Sun Jan 21, 2018 8:02 pm

Don’t know if the econet roms work. Having a running econet has been on the to-do list for the past 20 years at least. Before I found them under a store room table in 1993, the atoms had been used in undergraduate teaching on an econet administered by a system 3, so it’s pretty safe to assume they were functional at some time.

Wonder if the mystery rom was to allow it to work as a dumb terminal for logging onto the university mainframe (a rather primitive phx rom).

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Pernod
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Re: Atom ROMs

Post by Pernod » Thu Jun 21, 2018 3:18 pm

The MYSTERY is ONLI, whereas ONLI is MYSTERY mirrored.

ONLI is mentioned for the System 3, could this be it?
acornsystem1and3.jpg
Also, from the Acorn Computer Systems Catalogue:
ONLI Extension
This is an additional 2K byte program which adds statements to BASIC allowing the
control of experiments in real time. Designed to operate with laboratory interface
the state of each output or input is easily controlled and timed using the 10 mS
clock interrupt.
Last edited by Pernod on Thu Jun 21, 2018 3:34 pm, edited 1 time in total.
- Nigel

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jgharston
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Re: Atom ROMs

Post by jgharston » Thu Jun 21, 2018 3:52 pm

Boydie wrote:
Sun Jan 21, 2018 8:02 pm
Don’t know if the econet roms work. Having a running econet has been on the to-do list for the past 20 years at least.
As they are Econet 2 they will only be able to talk to other Econet 2 systems, the definitive Econet protocol is Econet 3.
Off the top of my head Econet 2 differs by:
* 1-byte station number (instead of 2)
* 16-bit address blocks (instead of 32)
* the Immediate Operations are in a different order (Eco3 is &80+x, Eco2 seems to be a random scattering of values)

Code: Select all

$ bbcbasic
PDP11 BBC BASIC IV Version 0.25
(C) Copyright J.G.Harston 1989,2005-2015
>_

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