Date : Sun, 03 Aug 2003 17:59:50 +0100
From : "C Alastair Seggie" <alastairseggie@...>
Subject: Re: BeebEm Development
Great to hear that you are going to look at the speed issue.
Is there any way to implement the 1MHz bus via the printer port? My
question is because there are quite a few BBC operated CNC Lathes,
Milling machines etc out there which operate off the 1MHz bus. You
normally find these with out the original BBC and more importantly the
ROM and software, which render it useless (I hate seeing things like
this go to waste.) At present people are just ripping out the guts and
replacing this with some simple electronics, just so that it can be
operated on a PC. You loose some of the better functions such as thread
cutting but it is at least useable.
With an emulated port you could have best of both worlds, with software
easily sent across the world and virtual ROMs that never degrade or get
tossed out.
I am normally quite close to my computer all day so I would volunteer to
test but I am by no means a BBC buff.
ALASTAIR
PS: If any one has some unusual ROMs they have found in BBCs from
colleges, especially if they are on a carrier with a second smaller chip
on the carrier, please let me know.
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<p class=MsoNormal><font size=2 face=Arial><span
style='font-size:10.0pt;
font-family:Arial'>Great to hear that you are going to look at the speed
issue.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span
style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span
style='font-size:10.0pt;
font-family:Arial'>Is there any way to implement the 1MHz bus<b><span
style='font-weight:bold'> </span></b>via the printer port? My question
is
because there are quite a few BBC operated CNC Lathes, Milling machines
etc out
there which operate off the 1MHz bus. You normally find these with out
the
original BBC and more importantly the ROM and software, which render it
useless
(I hate seeing things like this go to waste.) <span
style='mso-spacerun:yes'> </span>At present people are just
ripping out
the guts and replacing this with some simple electronics, just so that
it can
be operated on a PC. You loose some of the better functions such as
thread
cutting but it is@... useable. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span
style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span
style='font-size:10.0pt;
font-family:Arial'>With an emulated port you could have best of both
worlds,
with software easily sent across the world and virtual ROMs that never
degrade
or get tossed out.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span
style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span
style='font-size:10.0pt;
font-family:Arial'>I am normally quite close to my computer all day so I
would volunteer
to test but I am by no means a BBC buff.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span
style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span
style='font-size:10.0pt;
font-family:Arial'>ALASTAIR<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span
style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span
style='font-size:10.0pt;
font-family:Arial'>PS: If any one has some unusual ROMs they have found
in <span
class=SpellE>BBCs</span> from colleges, especially if they are on a
carrier
with a second smaller chip on the carrier, please let me
know.<o:p></o:p></span></font></p>
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