26 Dec
2008
26 Dec
'08
10:34 p.m.
Hi folks,
A few of you might remember the Jupiter Ace I had that took a 9V spike to
the expansion slot -- and my futile attempts at repairing it. It's been well
over four years since I sent it to a listmember who offered to repair it, and
all attempts to get the board or the spares I sent with it have failed. At
this point, I haven't seen hide nor hair of him in months, although he's
apparently still updating his website...
So basically I'm the proud (?) owner of the two sections of case, most of
the snap-rivets (apparently Maplin sell these, so I might be able to complete
the set), the rubber keyboard membrane, documentation, demo tape and a
(supposedly working) 16K RAM pack.
I've heard rumours of spare, unassembled Jupiter Ace PCBs kicking around;
does anyone happen to have one up for grabs? It looks like the only way I'm
going to get this thing up and running again would be to build a new mainboard
from scratch, thus that's what I'm planning to
do. About the only parts I need
are a Z80 CPU and a couple of 74LS logic chips.
Only other alternative would be to get a few PCBs made up for it, then
build one from scratch on that -- the catch being I haven't had any luck
creating a decent track master from the scans of the PCB that I have....
Can anyone assist me in my Quest to Build a Working Jupiter Ace (tm)?
Thanks,
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
27 Dec
27 Dec
8:14 p.m.
Only other alternative would be to get a few PCBs
made up for it, then
build one from scratch on that -- the catch being I haven't had any luck
creating a decent track master from the scans of the PCB that I have....
I hae an Ace -- somewhere (:-)). Assuming I can find it, I would be happy
to take the casing off and help you figure out the track layout. For
(very) obvious reasons I am not going to let that PCB out of my sight,
but I am sure something can be worked out.
-tony
8:48 p.m.
Only other
alternative would be to get a few PCBs made up for it, then
build one from scratch on that -- the catch being I haven't had any luck
creating a decent track master from the scans of the PCB that I have....
I hae an
Ace -- somewhere (:-)). Assuming I can find it, I would be happy
to take the casing off and help you figure out the track layout. For
(very) obvious reasons I am not going to let that PCB out of my sight,
but I am sure something can be worked out. 
9:09 p.m.
Alexandre Souza wrote:
What is so special about this junior ace?
I always think of it as the "forgotten ZX80" because it's built to the same
sort of quality level (and, IIRC, was built by ex-Sinclair employees).
It was reasonably unique* in running FORTH from ROM rather than BASIC (which
probably makes it a rarer animal than a ZX80, too)
* I'm not going to play the "only one ever" game, but I can't actually
think
of another home system which ran FORTH as the primary language...
cheers
Jules
11:35 p.m.
I always think of it as the "forgotten ZX80"
because it's built to the
same
sort of quality level (and, IIRC, was built by ex-Sinclair employees).
It was reasonably unique* in running FORTH from ROM rather than BASIC
(which
probably makes it a rarer animal than a ZX80, too)
* I'm not going to play the "only one ever" game, but I can't actually
think
of another home system which ran FORTH as the primary language...
Hmmm...
Maybe I may be bribed to create a single board for it :) What is the
size of the original mainboard? :o)
28 Dec
28 Dec
12:57 a.m.
Ooo ooo yes. Count me in for $50 towards a pcb if u go down that
route. Happy to pay via paypal or similar or simply put a note in
the post. I am in Australia
Doug Jackson
Principal Security Consultant
EWA Australia
Ph 02 6230 6833
Mo 0414 986 878
Sent from my iPhone
On 28/12/2008, at 10:35, "Alexandre Souza" <alexandre-listas at
e-secure.com.br
wrote:
I always think
of it as the "forgotten ZX80" because it's built to
the same
sort of quality level (and, IIRC, was built by ex-Sinclair
employees).
It was reasonably unique* in running FORTH from ROM rather than
BASIC (which
probably makes it a rarer animal than a ZX80, too)
* I'm not going to play the "only one ever" game, but I can't
actually think
of another home system which ran FORTH as the primary language...
Hmmm...
Maybe I may be bribed to create a single board for it :) What is
the size of the original mainboard? :o)
27 Dec
27 Dec
11:49 p.m.
Grrr...
It is SO simple...grrr...
Grrr...
Grr...
I'll give it a try, as soon as I have some free time :oP
Anyone willing into a "junior ace" project?
It has some simple milestones:
- 16K RAM if possible
- Reduction of number of ICs without using programable logic
- Single sided board (does not matter how much jumpers I'll have to put
in this beast)
- REMOVABLE keyboard (it is easy to make two single sided boards instead
of just one, because of the size)
- Fits inside the case of Jr. Ace.
http://www.jupiter-ace.co.uk/blankpcb.html
Andrew, since you have the empty case, would you mind taking the photos
of the above link and creating a schematic of dimensions and positions/size
of the holes?
Here I go in another crazy project...Bah :oP I do love to route boards
(small joke: I use an old program called CIRCAD98, and have lots of
pratice with that. Someday in my work, my coleagues were designing a board
for a PIC (bleargh) programmer, in a 10x10 board in Eagle PCB. I told them
why not create a smaller board, using single side only, and they said it was
impossible. I told them it was easy to do, without jumpers. To make a long
story short, they bidded an entire week of lunch on that - If I could route
manually this board, they would pay me a week of lunch. If I lost, I'd pay
their lunches for a week. I spent some two hours routing the board, but I
got it - imagine a board the size of a DIP-40 socket, with some 3 or 4
centimeters more. The board was for 40, 28, 20 and 16 pin PICs, if I'm not
mistaken, and I made it fit inside the DIP-40 socket, along part of the
circuit. I may have this drawing stashed somewhere, and the lunch was fine,
thanks! :oD)
Alexandre, the crazy guy. :oP
PS: Any hams here? PU1BZZ is how I'm called :)
28 Dec
28 Dec
5:34 p.m.
On Dec 27, 2008, at 6:49 PM, Alexandre Souza wrote:
Grrr...
It is SO simple...grrr...
Grrr...
Grr...
I'll give it a try, as soon as I have some free time :oP
Anyone willing into a "junior ace" project?
I'm interested. I'd have offered to route the board myself if you
hadn't. :) I was mildly interested earlier in the thread, but when I
learned that this machine has a Forth system in ROM, I became MUCH
more interested. I've got too many projects on the fire right now,
but that should get straightened out soon.
(small joke: I use an old program called CIRCAD98,
and have lots
of pratice with that. Someday in my work, my coleagues were
designing a board for a PIC (bleargh) programmer, in a 10x10 board
in Eagle PCB. I told them why not create a smaller board, using
single side only, and they said it was impossible. I told them it
was easy to do, without jumpers. To make a long story short, they
bidded an entire week of lunch on that - If I could route manually
this board, they would pay me a week of lunch. If I lost, I'd pay
their lunches for a week. I spent some two hours routing the board,
but I got it - imagine a board the size of a DIP-40 socket, with
some 3 or 4 centimeters more. The board was for 40, 28, 20 and 16
pin PICs, if I'm not mistaken, and I made it fit inside the DIP-40
socket, along part of the circuit. I may have this drawing stashed
somewhere, and the lunch was fine, thanks! :oD)
:-)
PS: Any hams here? PU1BZZ is how I'm called :)
I'm formerly KA2UZK, but long expired. The last time I was
licensed, the US had five license classes! I dearly want to get a
new ticket but haven't had the time.
-Dave
--
Dave McGuire
Port Charlotte, FL
5:50 p.m.
Anyone willing into a "junior ace"
project?
It's 'Jupiter Ace', or at least the orignal was.
It has some simple milestones:
- 16K RAM if possible
- Reduction of number of ICs without using programable logic
Why? Why change the design at all. All the original parts are, AFAIK,
easy to get still.
Certianly don't use programmable logic, which would make the thing harder
to repair in the future. There arne't that many TTL chips in there anyhow.
As regards the memory, the origianl Ace had 3K of RAM. 3 _separate_ areas
of 1K each (each one a pair of 2114s). One was used for program storage,
one for video RAM, and the last as the character generator. Without a
major redsign, you are goign to have ato keep the last 2 unchanged.
- Single sided board (does not matter how much
jumpers I'll have to put
in this beast)
Double sided PCBs are not much harder, surely?
-tony
8:16 p.m.
On Dec 28, 2008, at 12:50 PM, Tony Duell wrote:
In fact they're a whole lot easier, at least for the soldering!
-Dave
--
Dave McGuire
Port Charlotte, FL
- Single
sided board (does not matter how much jumpers I'll
have to put
in this beast)
Double sided PCBs are not much harder, surely?
9:47 p.m.
Double sided
PCBs are not much harder, surely?
In fact they're a whole lot easier, at least for the soldering! 
10:10 p.m.
Dave McGuire wrote:
On Dec 28, 2008, at 12:50 PM, Tony Duell wrote:
In fact they're a whole lot easier, at least for the soldering!
And if you use turned pin IC sockets, and place them carefully & solder
them in in the right order you can also top solder them if you are
making the board at home, where you won't have plated through holes.
Plus generally a double sided board has less holes to drill :)
BTW I was given a bare unpopulated Ace board for Christmas, I have taken
some scans of it but at 1200dpi they are *HUGE*
Cheers.
Phill.
--
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.
-
Single sided board (does not matter how much jumpers I'll have
to put
in this beast)
Double sided PCBs are not much harder, surely?
10:32 p.m.
On Dec 28, 2008, at 5:10 PM, Phill Harvey-Smith wrote:
In fact they're a whole lot
easier, at least for the soldering!
And if you use turned pin IC sockets, and place them carefully &
solder them in in the right order you can also top solder them if
you are making the board at home, where you won't have plated
through holes.
Plus generally a double sided board has less holes to drill :)
BTW I was given a bare unpopulated Ace board for Christmas, I have
taken some scans of it but at 1200dpi they are *HUGE*
I'd be willing to turn those scans into Gerber files if you send
them to me..
-Dave
--
Dave McGuire
Port Charlotte, FL
- Single
sided board (does not matter how much jumpers I'll
have to put
in this beast)
Double sided PCBs are not much harder, surely?
11:02 p.m.
Dave McGuire wrote:
On Dec 28, 2008, at 5:10 PM, Phill Harvey-Smith
wrote:
That would be cool, an eagle board layout would be better still.....
Let me see if I can zip em up small, I'll prolly upload them to a server
at work (and email off list) as it has much more bandwidth than I do and
they are really huge :)
Cheers.
Phill.
--
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.
BTW I was given a bare unpopulated Ace board for
Christmas, I have
taken some scans of it but at 1200dpi they are *HUGE*
I'd be willing to turn those scans into Gerber files if you send them
to me..
4:39 p.m.
On Dec 28, 2008, at 7:31 PM, Alexandre Souza wrote:
It wasn't that big, 230MB...only took ~15mins.
-Dave
--
Dave McGuire
Port Charlotte, FL
Let me see if
I can zip em up small, I'll prolly upload them to a
server at work (and email off list) as it has much more bandwidth
than I do and they are really huge :)
Rapidshare comes to mind
6:30 a.m.
On Dec 28, 2008, at 6:02 PM, Phill Harvey-Smith wrote:
That would be cool, an eagle board layout would be better still.....
Let me see if I can zip em up small, I'll prolly upload them to a
server at work (and email off list) as it has much more bandwidth
than I do and they are really huge :)
I use PCB, not Eagle, (see http://www.geda.seul.org/) but getting
them into SOME maintainable format would be better than nothing.
-Dave
--
Dave McGuire
Port Charlotte, FL
BTW I was given a bare unpopulated Ace board for
Christmas, I
have taken some scans of it but at 1200dpi they are *HUGE*
I'd be willing to
turn those scans into Gerber files if you send
them to me..
4:40 p.m.
On Dec 28, 2008, at 7:31 PM, Alexandre Souza wrote:
I'm thinking of just tracing it by hand into PCB (see http://
www.geda.seul.org/) which is the layout program I use for everything
I do.
-Dave
--
Dave McGuire
Port Charlotte, FL
I'd be
willing to turn those scans into Gerber files if you
send them to me..
I think this is a WAY better solution than mine :o)
BTW, which method/program you use for doing that, Dave?
5:43 p.m.
BTW, which
method/program you use for doing that, Dave?
I'm thinking of just tracing it
by hand into PCB (see http://
www.geda.seul.org/) which is the layout program I use for everything
I do. 
12:57 a.m.
Dave McGuire wrote:
I'd be willing to turn those scans into Gerber files if you send
them to me..
-Dave
I'd be interested in how this is done as well. Lots of folks ask me to
reproduce vintage boards, and creating EAGLE CAD drawings for them is
time consuming.
Jim
--
Jim Brain, Brain Innovations (X)
brain at jbrain.com
Dabbling in WWW, Embedded Systems, Old CBM computers, and Good Times!
Home: http://www.jbrain.com
4:46 p.m.
On Dec 28, 2008, at 7:57 PM, Jim Brain wrote:
Well I'm thinking about just tracing it manually as I've
mentioned...It is a bit time-consuming, but it's a simple board.
Now that I see the keyboard is a part of the main PCB, and looks
to be the type that uses those rubbery pads, I'm not sure what to do
about that. Any thoughts?
(I think I need to subscribe to cctalk as well, I seem to be
missing about half of every conversation)
-Dave
--
Dave McGuire
Port Charlotte, FL
I'd be
willing to turn those scans into Gerber files if you send
them to me..
I'd be interested in how this is done as well. Lots of folks ask
me to reproduce vintage boards, and creating EAGLE CAD drawings for
them is time consuming. 
6:06 p.m.
Dave McGuire wrote:
On Dec 28, 2008, at 7:57 PM, Jim Brain wrote:
Well I'm thinking about just tracing it manually as I've
mentioned...It is a bit time-consuming, but it's a simple board.
Now that I see the keyboard is a part of the main PCB, and looks to be
the type that uses those rubbery pads, I'm not sure what to do about
that. Any thoughts?
Redraw them to use clicky switches, such as you can buy in huge bags
I'd
be willing to turn those scans into Gerber files if you send
them to me..
I'd be interested in how this is done as well. Lots of folks ask me
to reproduce vintage boards, and creating EAGLE CAD drawings for them
is time consuming. from eBay for a couple of quid.
Gordon
28 Dec
28 Dec
11:09 p.m.
On 28 Dec 2008 at 22:10, Phill Harvey-Smith wrote:
And if you use turned pin IC sockets, and place them
carefully & solder
them in in the right order you can also top solder them if you are
making the board at home, where you won't have plated through holes.
There are also copper eyelets available intended for providing vias.
Cheers,
Chuck
29 Dec
29 Dec
6:30 p.m.
Dave McGuire wrote:
Sure. Acutally, I only use turned-pin sockets now, the extra cost is well
worth the lack of stress caused by intermittant connections [1].
In general, leaded compoents (resistors, capacitors, diodes, transistors,
etc cna be trivially soldered on both sides. ICs can too (if you are
careful not to overheat them), and of course turned-pin sockets. Some
connectors (particularly those box header plugs) and switches can't. With
those, you have to run a track on the bottom side of the PCB to a
suitable via.
-tony
On Dec 28, 2008, at 12:50 PM, Tony Duell wrote:
In fact they're a whole lot easier, at least for the soldering!
And if you use turned pin IC sockets, and place them carefully & solder
them in in the right order you can also top solder them if you are
making the board at home, where you won't have plated through holes. -
Single sided board (does not matter how much jumpers I'll have
to put
in this beast)
Double sided PCBs are not much harder, surely?
8:24 p.m.
Ooops, I missed a footnote. What I meant to say was :
Sure. Acutally, I only use turned-pin sockets now, the
extra cost is well
worth the lack of stress caused by intermittant connections [1].
[1] My Whitechapel MG1 came with nice turned-pin sockets for all the
'expensive stuff' (32016CPU, MMU, FPU, etc) but had the EPROMs in cheap
sockets. I had numerous problems due to bad connections at the latter. I
cut out the old sockets (the sockets were junk, the PCB valuable..) then
soldered turned-pin ones in place of them. And had no more problems.
-tony
30 Dec
30 Dec
9:32 a.m.
Same problem on the PET's we used to use, replaced the sockets with turned
pin types and all the problems were solved.
Mike.
----- Original Message -----
From: "Tony Duell" <ard at p850ug1.demon.co.uk>
To: <cctalk at classiccmp.org>
Sent: Monday, December 29, 2008 8:24 PM
Subject: Re: Jupiter Ace - PCBs and such
Ooops, I missed a footnote. What I meant to say was :
Sure. Acutally, I only use turned-pin sockets
now, the extra cost is well
worth the lack of stress caused by intermittant connections [1].
[1] My Whitechapel MG1 came with nice turned-pin sockets for all the
'expensive stuff' (32016CPU, MMU, FPU, etc) but had the EPROMs in cheap
sockets. I had numerous problems due to bad connections at the latter. I
cut out the old sockets (the sockets were junk, the PCB valuable..) then
soldered turned-pin ones in place of them. And had no more problems.
-tony
6:50 a.m.
New subject: turned-pin headers
Tony Duell wrote:
> And if you use turned pin IC sockets, and place
them carefully & solder
>
This raised a question for me.
Lots of folks are asking for simple "adapters" for things like:
* older 24 pin EPROM to 28 pin JEDEC EPROM
* daughtercards for 40 pin CPUs and such
I have some vintage items like this, and as I look at them, it looks
like they use something similar to a machine-pin socket, but each end of
the pin is the same (small diameter.
It looks similar to this:
http://www.king-cart.com/cgi-bin/cart.cgi?store=phoenixent&product_name…
But, this one has forks on the top, not a small pin.
Here's the right pin, but it's a 1x header, not a socket:
http://cgi.ebay.com/Machined-Pin-Header-male-40-round-gold-machine-pins_W0Q…
I know they are still made, but I have no idea what they are called.
Digikey and Mouser are not helping me find them. Anyone know what I am
talking about?
Jim
7:36 a.m.
New subject: turned-pin headers
From: "Jim Brain"
Here's the right pin, but it's a 1x header,
not a socket:
http://cgi.ebay.com/Machined-Pin-Header-male-40-round-gold-machine-pins_W0Q…
I know they are still made, but I have no idea what they are called.
Digikey and Mouser are not helping me find them. Anyone know what I am
talking about?
Something like Mouser #535-18-3625-11? (The 18 is the number of pins.)
Vince
7:38 a.m.
New subject: turned-pin headers
On 30 Dec 2008 at 0:50, Jim Brain wrote:
I know they are still made, but I have no idea what
they are called.
Digikey and Mouser are not helping me find them. Anyone know what I am
talking about?
Jim, are you talking about the adpaters made by Aries?
http://www.larsenassociates.com/ariesadapterlist.html
I remember when they introduced the Correct-A-Chip--intended for
applicationwhen your PCB layout guy was suffering the morning after
the night before and reversed the pins on an IC.
BTW, the Landmark ROM POST for the PC and XT used to use one of these
to adapt a 2764 to the 24-pin ROM configuration in the 5150. It has
a small slide swich on it to switch between 24 and 28 pins (when you
used it in a 5150, you let 4 pins hang over the edge of the socket).
Cheers,
Chuck
7:22 p.m.
New subject: turned-pin headers
I remember when they introduced the
Correct-A-Chip--intended for
applicationwhen your PCB layout guy was suffering the morning after
the night before and reversed the pins on an IC.
This reminds me of the possibly apocryphal story of the (expensive)
custom chip in a digital meter that turned out to be nothing more than a
7106 (or maybe a 7107) left-right reveresed. Apparently the designer
laied the PCB out wrongly..
(Of course once this was realised there were all sorts of 'creative'
solutions to save the cost of the right chip. Bending the pins of a 7106
right over, soldering one eupside-down to a header, or even mounting a
DIL socket on the solder side of the instrument PCB...)
-tony
7:48 p.m.
New subject: turned-pin headers
(Of course once this was realised there were all sorts
of 'creative'
solutions to save the cost of the right chip. Bending the pins of a 7106
right over, soldering one eupside-down to a header, or even mounting a
DIL socket on the solder side of the instrument PCB...)
(insert expletive here) happens! :oD
http://www.orkut.com.br/Main#AlbumZoom.aspx?uid=12070581936206943299&pi…
(an entire linear adjustable power supply, soldered backyards :oD
8:34 p.m.
New subject: turned-pin headers
On Tue, Dec 30, 2008 at 2:22 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
Ow... we had a Rev 0 board were the ins and outs were swapped - for
the few that were made, it was "easier" to correct the fault by
chopping the pins short of the board and making "X"es with wire to
swap pairs of adjacent pins.
Obviously that got fixed before Rev 1.
-ethan
I remember
when they introduced the Correct-A-Chip--intended for
applicationwhen your PCB layout guy was suffering the morning after
the night before and reversed the pins on an IC.
This reminds me of the possibly apocryphal story of the (expensive)
custom chip in a digital meter that turned out to be nothing more than a
7106 (or maybe a 7107) left-right reveresed. Apparently the designer
laied the PCB out wrongly..
9:38 p.m.
New subject: turned-pin headers
Ow... we had a Rev 0 board were the ins and outs were
swapped - for
the few that were made, it was "easier" to correct the fault by
chopping the pins short of the board and making "X"es with wire to
swap pairs of adjacent pins.
No ins ans outs swapped here - just connected together !.
Way back when, I maintained PDP7 and PDP11 for the UK Gov, a student
engineer was brought in to design a custom interface between the two
machines - smoke - the student dissappeared. Manager said find out why. The
design had input wired to output with a lot of unconnected logic in the
middle. -3V logic does not play nicely with +5V logic.
Mike
----- Original Message -----
From: "Ethan Dicks" <ethan.dicks at gmail.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Tuesday, December 30, 2008 8:34 PM
Subject: Re: turned-pin headers
> On Tue, Dec 30, 2008 at 2:22 PM, Tony Duell <ard at p850ug1.demon.co.uk>
> wrote:
>>> I remember when they introduced the Correct-A-Chip--intended for
>>> applicationwhen your PCB layout guy was suffering the morning after
>>> the night before and reversed the pins on an IC.
>>
>> This reminds me of the possibly apocryphal story of the (expensive)
>> custom chip in a digital meter that turned out to be nothing more than a
>> 7106 (or maybe a 7107) left-right reveresed. Apparently the designer
>> laied the PCB out wrongly..
>
Ow... we had a Rev 0 board were the ins and outs were
swapped - for
the few that were made, it was "easier" to correct the fault by
chopping the pins short of the board and making "X"es with wire to
swap pairs of adjacent pins.
>
> Obviously that got fixed before Rev 1.
>
> -ethan
>
>
7:54 a.m.
New subject: turned-pin headers
Jim Brain wrote:
I've done several projects with these cut to the needed length the
important thing is to inset them into a turned pin socket whilst you
solder the thing to ensure the correct pin spacing.
Cheers.
Phill.
7:19 p.m.
New subject: turned-pin headers
Tony Duell wrote:
The ones I've seen have a slightly thicker pin on the soldering side.
Last time I bought soemthing like this, it came as a 32-pin SIL strip. You
cut off as many pins as you needed and soldered them to the PCB. To fit a
DIL socket you'd cut off, say, 2 lenghts of 12 pins and solder them to
the PCB the appropraite distance apart to fit a 24 pin DIL socket. I
found that inserting the 'plug' end of the pins into a turned-pin DIL
socket kept them at the right spacing when I was soldering them.
I think I ought them from Farnell. Maybe RS components. I don't recall
having any prolems finding them.
-tony
> And if you use turned pin IC sockets, and
place them carefully & solder
>
This raised a question for me.
Lots of folks are asking for simple "adapters" for things like:
* older 24 pin EPROM to 28 pin JEDEC EPROM
* daughtercards for 40 pin CPUs and such
I have some vintage items like this, and as I look at them, it looks
like they use something similar to a machine-pin socket, but each end of
the pin is the same (small diameter.
8:33 p.m.
New subject: turned-pin headers
Tony Duell wrote:
I think I ought them from Farnell. Maybe RS
components. I don't recall
having any prolems finding them.
In the UK at least, they can be bought from Maplin, and from Rapid
Electrionics, and probably others, but the ones I have used have come
from those two. IIRC Rapid do them in convenient 20 pin
strips, so if
using on a 40 pin IC, saves the cutting....
Cheers.
Phill.
--
Phill Harvey-Smith, Programmer, Hardware hacker, and general eccentric !
"You can twist perceptions, but reality won't budge" -- Rush.
11:49 p.m.
Re:
It was reasonably unique* in running FORTH from ROM
rather than BASIC (which
probably makes it a rarer animal than a ZX80, too)
* I'm not going to play the "only one ever" game, but I can't actually
think
of another home system which ran FORTH as the primary language...
The Hector HRX :)
http://www.old-computers.com/museum/computer.asp?c=142
(Par Torlus is trying to make an FPGA reimplementation of the HRX, at
http://www.torlus.com/index.php?2007/01/31/198-hector-hrx-in-a-fpga )
--
Stan Sieler
sieler at allegro.com
www.allegro.com/sieler/wanted/index.html
27 Dec
27 Dec
9:16 p.m.
Philip Pemberton wrote:
I've heard rumours of spare, unassembled Jupiter
Ace PCBs kicking around;
does anyone happen to have one up for grabs? It looks like the only way I'm
going to get this thing up and running again would be to build a new
mainboard
I have a motherboard which probably works (may need some work). The
case basically crumbled and fell apart. It's up at my Mum's place, so
I'll dig it out of the loft next time I'm over there. I'd love to see
it brought back to life, too.
Mine's a pint.
Gordon
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afra＠aurigae.demon.co.uk -
alexandre-listas＠e-secure.com.br -
ard＠p850ug1.demon.co.uk -
brain＠jbrain.com -
cclist＠sydex.com -
classiccmp＠philpem.me.uk -
doug＠stillhq.com -
ethan.dicks＠gmail.com -
gordonjcp＠gjcp.net -
jules.richardson99＠gmail.com -
mcguire＠neurotica.com -
mike＠brickfieldspark.org -
sieler＠allegro.com -
vrs＠msn.com