Date   

Re: GPS i/p to elf 2k

James Tadlock <jamesa4404@...>
 

Thank you for the info. Do you think the GPIO card from the Sparetime Guys would give the needed i/o ports? Can you suggest a source fore info on the NMEA parser?

--- On Fri, 7/2/10, J.C. Wren <jcwren@...> wrote:


From: J.C. Wren <jcwren@...>
Subject: Re: [cosmacelf] GPS i/p to elf 2k
To: cosmacelf@...
Date: Friday, July 2, 2010, 9:31 PM


Most GPSs output data at 4800 baud.  I'll defer to the experts on what the
max speed is using bit-banged I/O, but if I was building something, I'd use
a CDP1854 UART.

I'd also do it assembly, although BASIC should be perfectly usable.  The
nice thing a NMEA parser is a very simple state machine.  Start the state
machine looking for a carriage return and/or linefeed, followed by a $.  If
the next character is not the eginning of the NMEA word you're looking for,
reset the state machine.  If it is, wait for the next character.  Repeat
until you get your $GGA or whatever it you're looking for.  Then start
counting commas, parse out the speed field, reset the state machine, you're
done.

You can probably get it down to about 20 instructions on average executed
between each character.

--jc

If at first you don't succeed, call in an airstrike.


On Fri, Jul 2, 2010 at 10:22 PM, jamesa4404 <jamesa4404@...> wrote:



I am thinking about using the elf 2k to read data from a GPS unit. Has
anybody tried this? The idea is to get MPH data from the GPS and display it
on a large LED display. Any suggestion on how to get the I/p and O/p it?
Could basic be used for the program or would I have to go to ASM?

 

[Non-text portions of this message have been removed]



------------------------------------

========================================================
Visit the COSMAC ELF website at http://www.cosmacelf.comYahoo! Groups Links








[Non-text portions of this message have been removed]


Re: GPS i/p to elf 2k

John Wren
 

Most GPSs output data at 4800 baud. I'll defer to the experts on what the
max speed is using bit-banged I/O, but if I was building something, I'd use
a CDP1854 UART.

I'd also do it assembly, although BASIC should be perfectly usable. The
nice thing a NMEA parser is a very simple state machine. Start the state
machine looking for a carriage return and/or linefeed, followed by a $. If
the next character is not the eginning of the NMEA word you're looking for,
reset the state machine. If it is, wait for the next character. Repeat
until you get your $GGA or whatever it you're looking for. Then start
counting commas, parse out the speed field, reset the state machine, you're
done.

You can probably get it down to about 20 instructions on average executed
between each character.

--jc

If at first you don't succeed, call in an airstrike.


On Fri, Jul 2, 2010 at 10:22 PM, jamesa4404 <jamesa4404@...> wrote:



I am thinking about using the elf 2k to read data from a GPS unit. Has
anybody tried this? The idea is to get MPH data from the GPS and display it
on a large LED display. Any suggestion on how to get the I/p and O/p it?
Could basic be used for the program or would I have to go to ASM?



[Non-text portions of this message have been removed]


GPS i/p to elf 2k

jamesa4404 <jamesa4404@...>
 

I am thinking about using the elf 2k to read data from a GPS unit. Has anybody tried this? The idea is to get MPH data from the GPS and display it on a large LED display. Any suggestion on how to get the I/p and O/p it? Could basic be used for the program or would I have to go to ASM?


Re: 1802 vs 1805/6

Richard
 

Hello Magnus!

Most of the 1800 series are a bit dated unless you want to build a computer completely 'retro'.

Among those you mentioned there also is the CDP1851. This one is a dual parallel IO port. Both ports can be configured for input, output, bidirectional and bit mode. I have seen that similar devices have been used to build IDE interfaces or to read input from a PS/2 keyboard or mouse. This one may be quite interesting.


Re: 1802 vs 1805/6

Lee Hart
 

On 6/26/2010 2:14 AM, Magnus wrote:
Yo!

I was looking for cheap (surplus) components at small components shop here in Sweden when I spotted lots of COSMAC chips in the list. OF COURSE there was the 1802, which I just bought on eBay ...but also 1805/6. The latter has some extra functions like internal timers/counters and extra instruxctions.
My question is, is there any idea to grab an 1805/06 instead of the 1802 "just in case ..." or will the original 1802 do most (all) work brilliant w/o the extra frills and laces?

I'd be hoping to grab some latches/decoders and buffers as well as IC sockets for wiring, something I cannot find just like that here in Sweden any longer.
The 1804/5/6 are slightly improved versions of the 1802. Depending on the particular model, they have internal ROM, RAM, a timer, and some new instructions. They were intended for single-chip microcontroller applications, where you ordered them with your program already in the internal ROM.

Not much code was written to use the new instructions. The internal ROM is useless for general purpose applications; it is typically disabled so you can use it with external memory chips instead.

The only thing missing in the 1804/5/6 that the 1802 has is the LOAD mode. Unfortunately, LOAD is used in the Elf computers for their front panel interface.

I bought some 1805's on eBay for a good price. If you'd like to experiment, I'd be happy to swap one for an 1802.
--
Lee A. Hart | Ring the bells that still can ring
814 8th Ave N | Forget the perfect offering
Sartell MN 56377 | There is a crack in everything
leeahart earthlink.net | That's how the light gets in -- Leonard Cohen


Re: 1802 vs 1805/6

Ray Sills <raysills@...>
 

Hi Art:

Hmmm. That suggests that you could put an 1805 or 1806 into a VIP. The VIP has an "OS" in ROM, which is invoked when you hold down the hexpad key "C" when switching to RUN mode. Now the question becomes, would those extra instructions really be useful on the VIP platform?

73 de Ray

On Jun 26, 2010, at 12:37 PM, Art G. Granzeier III wrote:

Magnus,

Nice find.

The answer to your question is: (as usual) it depends. The 1805/6, as you
mentioned, has more instructions and is a bit more powerful. However,
what it is lacking is the Program Load mode built in to the processor. If
you are running a system with a ROM startup routine, then the 1805 will
work fine (it is fully object code compatible with the 1802), but if you
are running a Classic Elf-class system with no ROM and the toggle switches
to load your programs, then the 1805 will not work. This is mentioned in
Spare Time Gizmo's Elf 2000 manual (pg. 2, the last bullet point under the
Overview.)


--
Art G. Granzeier III
President, Granzeier Consulting
Helping to build a better engineer.


1802 vs 1805/6
Posted by: "Magnus" tubes@... soundbrigade
Sat Jun 26, 2010 12:14 am (PDT)


Yo!

I was looking for cheap (surplus) components at small components shop
here >in Sweden when I spotted lots of COSMAC chips in the list. OF
COURSE there >was the 1802, which I just bought on eBay ...but also
1805/6. The latter >has some extra functions like internal
timers/counters and extra >instruxctions.
My question is, is there any idea to grab an 1805/06 instead of the 1802
"just in case ..." or will the original 1802 do most (all) work
brilliant >w/o the extra frills and laces?

I'd be hoping to grab some latches/decoders and buffers as well as IC
sockets for wiring, something I cannot find just like that here in
Sweden >any longer.

/Magnus



------------------------------------

========================================================
Visit the COSMAC ELF website at http://www.cosmacelf.comYahoo! Groups Links



Re: 1802 vs 1805/6

granz_consult
 

Magnus,

Nice find.

The answer to your question is: (as usual) it depends. The 1805/6, as you
mentioned, has more instructions and is a bit more powerful. However,
what it is lacking is the Program Load mode built in to the processor. If
you are running a system with a ROM startup routine, then the 1805 will
work fine (it is fully object code compatible with the 1802), but if you
are running a Classic Elf-class system with no ROM and the toggle switches
to load your programs, then the 1805 will not work. This is mentioned in
Spare Time Gizmo's Elf 2000 manual (pg. 2, the last bullet point under the
Overview.)


--
Art G. Granzeier III
President, Granzeier Consulting
Helping to build a better engineer.


1802 vs 1805/6
Posted by: "Magnus" tubes@... soundbrigade
Sat Jun 26, 2010 12:14 am (PDT)


Yo!

I was looking for cheap (surplus) components at small components shop
here >in Sweden when I spotted lots of COSMAC chips in the list. OF
COURSE there >was the 1802, which I just bought on eBay ...but also
1805/6. The latter >has some extra functions like internal
timers/counters and extra >instruxctions.
My question is, is there any idea to grab an 1805/06 instead of the 1802
"just in case ..." or will the original 1802 do most (all) work
brilliant >w/o the extra frills and laces?

I'd be hoping to grab some latches/decoders and buffers as well as IC
sockets for wiring, something I cannot find just like that here in
Sweden >any longer.

/Magnus


Re: 1802 vs 1805/6

Magnus Kesselmark
 

Hello Bob!

Thanks a lot for your answers. However there were so much more nice stuff in the list:
CDP1851, 1852, 1853, 1856, 1857, 1858, 1859, 1861, 1867, 1868, 1870, 1871, 1872, 1877, 1879 and some more ...

Magnus

----- Original Message -----
From: Bob Armstrong
To: cosmacelf@...
Sent: Saturday, June 26, 2010 4:31 PM
Subject: RE: [cosmacelf] 1802 vs 1805/6



Magnus,

>My question is, is there any idea to grab an 1805/06 instead of the 1802
"just in case

Two things -

* The 1805/6 doesn't have LOAD mode, so if you plan to use a traditional
Popular Electronics Elf style lights and switches "front panel" then you
must have the 1802.

* The 1805/6 does have some nice extra instructions, but AFAIK there's no
software floating around out there for the 180x that uses them. So unless
you're planning to write a lot of your own software, the extra opcodes are
pointless.

Bob Armstrong


Re: 1802 vs 1805/6

 

Magnus,

My question is, is there any idea to grab an 1805/06 instead of the 1802
"just in case

Two things -

* The 1805/6 doesn't have LOAD mode, so if you plan to use a traditional
Popular Electronics Elf style lights and switches "front panel" then you
must have the 1802.

* The 1805/6 does have some nice extra instructions, but AFAIK there's no
software floating around out there for the 180x that uses them. So unless
you're planning to write a lot of your own software, the extra opcodes are
pointless.

Bob Armstrong


1802 vs 1805/6

Magnus Kesselmark
 

Yo!

I was looking for cheap (surplus) components at small components shop here in Sweden when I spotted lots of COSMAC chips in the list. OF COURSE there was the 1802, which I just bought on eBay ...but also 1805/6. The latter has some extra functions like internal timers/counters and extra instruxctions.
My question is, is there any idea to grab an 1805/06 instead of the 1802 "just in case ..." or will the original 1802 do most (all) work brilliant w/o the extra frills and laces?

I'd be hoping to grab some latches/decoders and buffers as well as IC sockets for wiring, something I cannot find just like that here in Sweden any longer.

/Magnus


Re: New member - introduction

Magnus Kesselmark
 

I will eventually check out the ELF-site properly to grasp some additional info and brush up my Cosmacian. Howvere I have too many tube amp projects going on and just got an inquiry about sewing four corset for a dance troup dancing som Peruvian dance.
Next I will wire something simple and get started. The 1802 isn't really difficult to learn to program, a bit odd, but not difficult.
I will not go for the VIP but like to interface an alphanumeric display instead.

Hope to see more of you and hope to get some stuff ready soon ...

/Magnus

----- Original Message -----
From: Winston Lowe
To: cosmacelf@...
Sent: Wednesday, June 23, 2010 1:11 AM
Subject: Re: [cosmacelf] New member - introduction



Welcome to the group.
About 6 mouth ago I had the 1802 fever and made this,
http://www.youtube.com/watch?v=FE8tfA6or4A
http://www.youtube.com/watch?v=G-C9o1XCpck

It take about 1 mouth to make my own eeprom programmer
And then about 1 mouth to figure out all the logic I need for the conversion of a RCA studio ii to Cosmac elf/vip
And then i made my own assembler in PHP for the fun of it. and then with my own ASM language I made a OS.

Anyway have fun and enjoy.
Winston
KJ6ICA

________________________________
From: Magnus <tubes@...>
To: cosmacelf@...
Sent: Sat, June 19, 2010 2:33:46 AM
Subject: [cosmacelf] New member - introduction

Shortly ....

I am Magnus (or unofficially Soundbrigade, due to my great interest in audio/HiFi), living in the land of small people (Sweden). I am an electronic engineer but are assembling fire vents at a very small company in the small and sh*tty town of Vänersborg not far from Gothenburg.

I got hooked on the 1802 when I saw the article about the PE Elf back in 1978 and at my job, we assembled a kit to use for training. later I bought a CPU fopr myself and had an operating Elf until 1998 when the basement was raided and everyuthing that looked valuable was stolen (my box with electronic components). The Elf-ideas were dropped and I have since spent a lot of time assembling speakers and tube amplifiers (www.pastisch.se). But just a few weeks ago I ordered a CDP1802, a 2K RAM and an 82C55 in order to once again be back in the Cosmac swamps, just to discover that I propably ditched my old 1802 ´books recently as I didn't think I would never have another go ...

Back then I had planned to have the Elf to control a model railway layout, but the railway stuff was stolen together with the electronics. Today I just want to learn how to fly the 1802 and possible have it hooked up to some synthesizers and music instruments I am about to build.

... and I just found the 'Programmer's Guide To The 1802 (With an assembler for your machine)' by Tom Swan. Also I will get the EFA-books (Electronics For All, but in Swedish) from our library and "rip" (electronically) the chapters on the version of Elf appearing in the books.

/Magnus



[Non-text portions of this message have been removed]





[Non-text portions of this message have been removed]


Re: New member - introduction

Winston Lowe <wel97459@...>
 

Welcome to the group.
About 6 mouth ago I had the 1802 fever and made this,
http://www.youtube.com/watch?v=FE8tfA6or4A
http://www.youtube.com/watch?v=G-C9o1XCpck


It take about 1 mouth to make my own eeprom programmer
And then about 1 mouth to figure out all the logic I need for the conversion of a RCA studio ii to Cosmac elf/vip
And then i made my own assembler in PHP for the fun of it. and then with my own ASM language I made a OS.

Anyway have fun and enjoy.
Winston
KJ6ICA



________________________________
From: Magnus <tubes@...>
To: cosmacelf@...
Sent: Sat, June 19, 2010 2:33:46 AM
Subject: [cosmacelf] New member - introduction


Shortly ....

I am Magnus (or unofficially Soundbrigade, due to my great interest in audio/HiFi), living in the land of small people (Sweden). I am an electronic engineer but are assembling fire vents at a very small company in the small and sh*tty town of Vänersborg not far from Gothenburg.

I got hooked on the 1802 when I saw the article about the PE Elf back in 1978 and at my job, we assembled a kit to use for training. later I bought a CPU fopr myself and had an operating Elf until 1998 when the basement was raided and everyuthing that looked valuable was stolen (my box with electronic components). The Elf-ideas were dropped and I have since spent a lot of time assembling speakers and tube amplifiers (www.pastisch.se). But just a few weeks ago I ordered a CDP1802, a 2K RAM and an 82C55 in order to once again be back in the Cosmac swamps, just to discover that I propably ditched my old 1802 ´books recently as I didn't think I would never have another go ...

Back then I had planned to have the Elf to control a model railway layout, but the railway stuff was stolen together with the electronics. Today I just want to learn how to fly the 1802 and possible have it hooked up to some synthesizers and music instruments I am about to build.

... and I just found the 'Programmer's Guide To The 1802 (With an assembler for your machine)' by Tom Swan. Also I will get the EFA-books (Electronics For All, but in Swedish) from our library and "rip" (electronically) the chapters on the version of Elf appearing in the books.

/Magnus

[Non-text portions of this message have been removed]







[Non-text portions of this message have been removed]


Re: New member - introduction

Lee Hart
 

On 6/19/2010 4:33 AM, Magnus wrote:
I am Magnus... I got hooked on the 1802 when I saw the article about
the PE Elf back in 1978... just a few weeks ago I ordered a CDP1802,
a 2K RAM and an 82C55 in order to once again be back in the Cosmac
swamps...
Welcome, Magnus! Good to have you with us.

Today I just want to learn how to fly the 1802 and
possible have it hooked up to some synthesizers and music
instruments I am about to build.
There was a recent post with links to music made with the 1802, using a VIP with sound board. Pretty impressive for the time!

--
Lee A. Hart | Ring the bells that still can ring
814 8th Ave N | Forget the perfect offering
Sartell MN 56377 | There is a crack in everything
leeahart earthlink.net | That's how the light gets in -- Leonard Cohen


Re: New member - introduction

Chris <ctwardell@...>
 

Magnus,

Welcome to group!

Chris Wardell

--- In cosmacelf@..., "Magnus" <tubes@...> wrote:

Shortly ....

I am Magnus (or unofficially Soundbrigade, due to my great interest in audio/HiFi), living in the land of small people (Sweden). I am an electronic engineer but are assembling fire vents at a very small company in the small and sh*tty town of Vänersborg not far from Gothenburg.

I got hooked on the 1802 when I saw the article about the PE Elf back in 1978 and at my job, we assembled a kit to use for training. later I bought a CPU fopr myself and had an operating Elf until 1998 when the basement was raided and everyuthing that looked valuable was stolen (my box with electronic components). The Elf-ideas were dropped and I have since spent a lot of time assembling speakers and tube amplifiers (www.pastisch.se). But just a few weeks ago I ordered a CDP1802, a 2K RAM and an 82C55 in order to once again be back in the Cosmac swamps, just to discover that I propably ditched my old 1802 ´books recently as I didn't think I would never have another go ...

Back then I had planned to have the Elf to control a model railway layout, but the railway stuff was stolen together with the electronics. Today I just want to learn how to fly the 1802 and possible have it hooked up to some synthesizers and music instruments I am about to build.

... and I just found the 'Programmer's Guide To The 1802 (With an assembler for your machine)' by Tom Swan. Also I will get the EFA-books (Electronics For All, but in Swedish) from our library and "rip" (electronically) the chapters on the version of Elf appearing in the books.

/Magnus

[Non-text portions of this message have been removed]


New member - introduction

Magnus Kesselmark
 

Shortly ....

I am Magnus (or unofficially Soundbrigade, due to my great interest in audio/HiFi), living in the land of small people (Sweden). I am an electronic engineer but are assembling fire vents at a very small company in the small and sh*tty town of Vänersborg not far from Gothenburg.

I got hooked on the 1802 when I saw the article about the PE Elf back in 1978 and at my job, we assembled a kit to use for training. later I bought a CPU fopr myself and had an operating Elf until 1998 when the basement was raided and everyuthing that looked valuable was stolen (my box with electronic components). The Elf-ideas were dropped and I have since spent a lot of time assembling speakers and tube amplifiers (www.pastisch.se). But just a few weeks ago I ordered a CDP1802, a 2K RAM and an 82C55 in order to once again be back in the Cosmac swamps, just to discover that I propably ditched my old 1802 ´books recently as I didn't think I would never have another go ...

Back then I had planned to have the Elf to control a model railway layout, but the railway stuff was stolen together with the electronics. Today I just want to learn how to fly the 1802 and possible have it hooked up to some synthesizers and music instruments I am about to build.

... and I just found the 'Programmer's Guide To The 1802 (With an assembler for your machine)' by Tom Swan. Also I will get the EFA-books (Electronics For All, but in Swedish) from our library and "rip" (electronically) the chapters on the version of Elf appearing in the books.

/Magnus

[Non-text portions of this message have been removed]


Quest Super ELF Unbuilt Kits For Sale

Peter Putnam <peter@...>
 

Greetings to the List,

I am offering for sale:

1. Quest Super ELF Unbuilt kit (with a CDP1861 Video chip)
2. Quest Super Expansion Board Unbuilt kit
3. Super Monitor EPROM Ver 2.0

The kits can be seen as item 200484755486 on that time-tested favorite of generations, eBay.

The auction ends June 27th, 2010.

Regards,
Peter


Roll Over Hex for Giant Monitor

Eric Tchong
 

A file to improve the use of the hex keyboard with the Giant ROM has been uploaded.


New file uploaded to cosmacelf

cosmacelf@...
 

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the cosmacelf
group.

File : /giantboardv2.hex
Uploaded by : rikitin60 <serenata@...>
Description : Roll Over Hex for Giant Monitor

You can access this file at the URL:
http://groups.yahoo.com/group/cosmacelf/files/giantboardv2.hex

To learn more about file sharing for your group, please visit:
http://help.yahoo.com/l/us/yahoo/groups/original/members/forms/general.htmlfiles

Regards,

rikitin60 <serenata@...>


Re: bad prom

Eric Tchong
 

Hello Glen,
May I recommend a simple change in the monitor code that will greatly
improve the use of the hex keypad.
Change the 7 bytes at 0029.

Old 0029 3F 29 37 2B 6C 64 22
New 0029 6C 64 22 3F 29 37 2E

Ref. Ipso Facto #25 page 11.
Roll Over HEX on the Elf II by T. Jones

I lost this article. But it is really good.

Enjoy your new prom. I wish I have it like that too. Mine still is OK.

Bye,
Eric Tchong from Aruba

-----Original Message-----
From: cosmacelf@... [mailto:cosmacelf@...] On Behalf
Of Glen Roger
Sent: Thursday, June 17, 2010 7:43 PM
To: cosmacelf@...
Subject: Re: [cosmacelf] Re: bad prom

Steve,
If you could do that I would be happy to reimburse you for any expenses...
and be eternally grateful. Thanks for looking into this.
Glen

- Show quoted text -


On Thu, Jun 17, 2010 at 2:06 PM, aa3nm <steve@...> wrote:



Al,
Thanks, Got it.
Assembled just fine using PseudoSam 18 Assembler.

Posted the .LIS, .OBJ and .Bin files back - to be complete.

Burner handles just about anything made before ~1990 so the 74LS471 should
not be an issue but I'll look it up in the DataIO book to be sure.

Now to get one...

I think I'll let that be the cost of the project for Glen...

Steve


--- In cosmacelf@... <cosmacelf%40yahoogroups.com>, "wa9hsl"
<wa9hsl@...> wrote:

Steve,
There is a copy of the 256-byte Netronics monitor in the files section
just above your folder that you could probably read in but one more thing
to
consider is that the monitor prom A10 is a 74LS471 is a "TTL PROM" 8x256
and
your PROM burner might not be able to handle it. (or maybe it can)
Datasheets are available on the web but it might be an involved process if
you are not set up for it.

al
....

--- In cosmacelf@... <cosmacelf%40yahoogroups.com>, "aa3nm"
<steve@> wrote:

Glen,

I have a DataIO PROM Burner that is up to the task. What is necessary
is to have the data and the new device. Data can be transported
electronically if you can read the prom. Another option would be, if you
have the listing, get it in to an assembler and produce the binary. either
way, I can edit the .BIN file (if needed) and send it off the burner.
Failing all those options, I'd be happy to receive the prom via snail
mail,
read it into memory, edit the errant byte, and burn a new one. I may even
have some old PROMS laying around that I could donate to the cause.

Steve


--- In cosmacelf@... <cosmacelf%40yahoogroups.com>, Glen
Roger <groger@> wrote:

I just walked through the prom on my Giant Board and found that in
the cassette write subroutine - at F0AF I have a 9D when I should
have
a 9C. Now, how does one go about replacing the prom? Any suggestions
about where I can get one?
Thanks

Glen






------------------------------------

========================================================
Visit the COSMAC ELF website at http://www.cosmacelf.comYahoo! Groups Links




__________ NOD32 5205 (20100617) Information __________

This message was checked by NOD32 antivirus system.
http://www.eset.com


Re: bad prom

Glen Roger <groger@...>
 

Steve,
If you could do that I would be happy to reimburse you for any expenses...
and be eternally grateful. Thanks for looking into this.
Glen

- Show quoted text -


On Thu, Jun 17, 2010 at 2:06 PM, aa3nm <steve@...> wrote:



Al,
Thanks, Got it.
Assembled just fine using PseudoSam 18 Assembler.

Posted the .LIS, .OBJ and .Bin files back - to be complete.

Burner handles just about anything made before ~1990 so the 74LS471 should
not be an issue but I'll look it up in the DataIO book to be sure.

Now to get one...

I think I'll let that be the cost of the project for Glen...

Steve


--- In cosmacelf@... <cosmacelf%40yahoogroups.com>, "wa9hsl"
<wa9hsl@...> wrote:

Steve,
There is a copy of the 256-byte Netronics monitor in the files section
just above your folder that you could probably read in but one more thing to
consider is that the monitor prom A10 is a 74LS471 is a "TTL PROM" 8x256 and
your PROM burner might not be able to handle it. (or maybe it can)
Datasheets are available on the web but it might be an involved process if
you are not set up for it.

al
....

--- In cosmacelf@... <cosmacelf%40yahoogroups.com>, "aa3nm"
<steve@> wrote:

Glen,

I have a DataIO PROM Burner that is up to the task. What is necessary
is to have the data and the new device. Data can be transported
electronically if you can read the prom. Another option would be, if you
have the listing, get it in to an assembler and produce the binary either
way, I can edit the .BIN file (if needed) and send it off the burner.
Failing all those options, I'd be happy to receive the prom via snail mail,
read it into memory, edit the errant byte, and burn a new one. I may even
have some old PROMS laying around that I could donate to the cause.

Steve


--- In cosmacelf@... <cosmacelf%40yahoogroups.com>, Glen
Roger <groger@> wrote:

I just walked through the prom on my Giant Board and found that in
the cassette write subroutine - at F0AF I have a 9D when I should
have
a 9C. Now, how does one go about replacing the prom? Any suggestions
about where I can get one?
Thanks

Glen


[Non-text portions of this message have been removed]