Bunch of Apple II clones for repair
I have never been to any of the repair workshops. I have four very obscure Apple II clones I brought from Brazil and I want to repair them in order to show on VCF East 2024. Normally I would do at home by myself, but is this something I can bring to the repair workshop and work there? Is this how it works? Ricardo. Sent from my iPhone
On Fri, Dec 29, 2023 at 10:26 PM Ricardo 8-Bit Desk via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
I have never been to any of the repair workshops. I have four very obscure Apple II clones I brought from Brazil and I want to repair them in order to show on VCF East 2024. Normally I would do at home by myself, but is this something I can bring to the repair workshop and work there? Is this how it works?
Hello Ricardo, Normally you sign up to the repair workshop list and let everyone know what you are working. You can also announced here, on this list, that you would like help in repairing them. Make sure to come as prepared as possible with research on what you will be doing. And yes, Apple II clones are right in line with the types of things that are repaired at these repair workshops. If you haven't done so already, then sign up here: https://docs.google.com/spreadsheets/d/1mvvxokquUZLiEGQB7nDF7GioTslQxHx3dSG5... Jeff Brace
Ricardo.
Sent from my iPhone
Hello! Jeff, this weekend I'll be along, and will be interested in helping out, besides my own work, and the stint in the museum. Ricardo look for someone wearing a (wornout) John Deere hat, that will be me. ----- Gregg C Levine gregg.drwho8@gmail.com "This signature fought the Time Wars, time and again." On Sat, Dec 30, 2023 at 4:02 AM Jeffrey Brace via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
On Fri, Dec 29, 2023 at 10:26 PM Ricardo 8-Bit Desk via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
I have never been to any of the repair workshops. I have four very obscure Apple II clones I brought from Brazil and I want to repair them in order to show on VCF East 2024. Normally I would do at home by myself, but is this something I can bring to the repair workshop and work there? Is this how it works?
Hello Ricardo,
Normally you sign up to the repair workshop list and let everyone know what you are working. You can also announced here, on this list, that you would like help in repairing them. Make sure to come as prepared as possible with research on what you will be doing. And yes, Apple II clones are right in line with the types of things that are repaired at these repair workshops.
If you haven't done so already, then sign up here: https://docs.google.com/spreadsheets/d/1mvvxokquUZLiEGQB7nDF7GioTslQxHx3dSG5...
Jeff Brace
Ricardo. Sent from my iPhone
And this message is sponsored by the Rebel Alliance to Restore the Republic (again)
Tks Gregg. I have no idea what state the computers are. I know for sure they need a good test on their power supply to start with. My knowledge of Apple II is very limited (more of a Commodore person) but I could NOT resist those last time I was in Brazil. I will try to be there around 9-ish on Saturday. See you all there! Sent from my iPhone
On Jan 2, 2024, at 6:58 PM, Gregg Levine via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
Hello! Jeff, this weekend I'll be along, and will be interested in helping out, besides my own work, and the stint in the museum. Ricardo look for someone wearing a (wornout) John Deere hat, that will be me. ----- Gregg C Levine gregg.drwho8@gmail.com "This signature fought the Time Wars, time and again."
On Sat, Dec 30, 2023 at 4:02 AM Jeffrey Brace via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
On Fri, Dec 29, 2023 at 10:26 PM Ricardo 8-Bit Desk via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
I have never been to any of the repair workshops. I have four very obscure Apple II clones I brought from Brazil and I want to repair them in order to show on VCF East 2024. Normally I would do at home by myself, but is this something I can bring to the repair workshop and work there? Is this how it works?
Hello Ricardo,
Normally you sign up to the repair workshop list and let everyone know what you are working. You can also announced here, on this list, that you would like help in repairing them. Make sure to come as prepared as possible with research on what you will be doing. And yes, Apple II clones are right in line with the types of things that are repaired at these repair workshops.
If you haven't done so already, then sign up here: https://docs.google.com/spreadsheets/d/1mvvxokquUZLiEGQB7nDF7GioTslQxHx3dSG5...
Jeff Brace
Ricardo. Sent from my iPhone
And this message is sponsored by the Rebel Alliance to Restore the Republic (again)
On 1/2/24 19:12, Ricardo 8-Bit Desk via vcf-midatlantic wrote: Ricardo, not sure of your background, mine is in software and hardware so it come a bit more 'natural' to me. It's not natural until one learns the details. Good news is that if you ask folks can help.
I have no idea what state the computers are. I know for sure they need a good test on their power supply to start with.
NJ, definitely NJ (yes, bad joke).
My knowledge of Apple II is very limited (more of a Commodore person) but I could NOT resist those last time I was in Brazil.
I will try to be there around 9-ish on Saturday.
I won't be there until Sunday, sorry.
See you all there!
Suggestions (some folks may correct them or have much better ideas): Check your power first, always. Then a quick check of the CPU clock and see if the address are changing (both with an oscilloscope). Tied the data buss to $EA (NOP) should step you through each address though it will start at $EAEA (I think). I think you use a few resistors on the data buss to pull the bits to 1 (1110 1010 - D7 - D0). At the ROM socket would probably work okay. Might need to pull the RAM to check this. Others will be able to help further at the workshop (and may have diag ROMS to help). Any Apple II, II+, or clone schematic will probably work okay for figuring things out but a bit of guess work will be needed. A quick search of the net should help. The operation of the Apple II will be very similar. Weird, writing this down is making me think of how to debug my 68HC11 dev board. :-) -- Linux Home Automation Neil Cherry kd2zrq@linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies KD2ZRQ
Software development for the whole life (started with the good old ZX81). And electronics/retro fixing on the last 4 years. Still learning😁 Do I need to bring any tools or are we filly equipped there? Ricardo. Sent from my iPhone
On Jan 3, 2024, at 2:11 AM, Neil Cherry <ncherry@linuxha.com> wrote:
On 1/2/24 19:12, Ricardo 8-Bit Desk via vcf-midatlantic wrote:
Ricardo, not sure of your background, mine is in software and hardware so it come a bit more 'natural' to me. It's not natural until one learns the details. Good news is that if you ask folks can help.
I have no idea what state the computers are. I know for sure they need a good test on their power supply to start with.
NJ, definitely NJ (yes, bad joke).
My knowledge of Apple II is very limited (more of a Commodore person) but I could NOT resist those last time I was in Brazil. I will try to be there around 9-ish on Saturday.
I won't be there until Sunday, sorry.
See you all there!
Suggestions (some folks may correct them or have much better ideas):
Check your power first, always. Then a quick check of the CPU clock and see if the address are changing (both with an oscilloscope).
Tied the data buss to $EA (NOP) should step you through each address though it will start at $EAEA (I think). I think you use a few resistors on the data buss to pull the bits to 1 (1110 1010 - D7 - D0). At the ROM socket would probably work okay. Might need to pull the RAM to check this.
Others will be able to help further at the workshop (and may have diag ROMS to help).
Any Apple II, II+, or clone schematic will probably work okay for figuring things out but a bit of guess work will be needed. A quick search of the net should help. The operation of the Apple II will be very similar.
Weird, writing this down is making me think of how to debug my 68HC11 dev board. :-)
-- Linux Home Automation Neil Cherry kd2zrq@linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies KD2ZRQ
The CDL building is fully equipped with tools and electronics repair resources. Those conveniences are available to you as part of the $15 you pay per day for the workshop. However, those resources may be limited due to the shared use of others who may also be using those resources. Many of us bring our own tools just in case, then utilize CDL resources for anything we don't have in our personal collection of tools. Also, it never hurts to ask others to borrow their tools. Just be respectful whether they lend them to you or decide they don't want to lend them out. See you at the Workshop! Jeff Salzman On Wed, Jan 3, 2024, 7:19 AM Ricardo 8-Bit Desk via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
Software development for the whole life (started with the good old ZX81). And electronics/retro fixing on the last 4 years. Still learning😁
Do I need to bring any tools or are we filly equipped there?
Ricardo.
Sent from my iPhone
On Jan 3, 2024, at 2:11 AM, Neil Cherry <ncherry@linuxha.com> wrote:
On 1/2/24 19:12, Ricardo 8-Bit Desk via vcf-midatlantic wrote:
Ricardo, not sure of your background, mine is in software and hardware so it come a bit more 'natural' to me. It's not natural until one learns the details. Good news is that if you ask folks can help.
I have no idea what state the computers are. I know for sure they need a good test on their power supply to start with.
NJ, definitely NJ (yes, bad joke).
My knowledge of Apple II is very limited (more of a Commodore person) but I could NOT resist those last time I was in Brazil. I will try to be there around 9-ish on Saturday.
I won't be there until Sunday, sorry.
See you all there!
Suggestions (some folks may correct them or have much better ideas):
Check your power first, always. Then a quick check of the CPU clock and see if the address are changing (both with an oscilloscope).
Tied the data buss to $EA (NOP) should step you through each address though it will start at $EAEA (I think). I think you use a few resistors on the data buss to pull the bits to 1 (1110 1010 - D7 - D0). At the ROM socket would probably work okay. Might need to pull the RAM to check this.
Others will be able to help further at the workshop (and may have diag ROMS to help).
Any Apple II, II+, or clone schematic will probably work okay for figuring things out but a bit of guess work will be needed. A quick search of the net should help. The operation of the Apple II will be very similar.
Weird, writing this down is making me think of how to debug my 68HC11 dev board. :-)
-- Linux Home Automation Neil Cherry kd2zrq@linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies KD2ZRQ
Better yet BYO It never hurts to have hand tools with you ! Mike R. Sent from: My extremely complicated, hand held electronic device.
On Jan 3, 2024, at 8:26 AM, Jeff S via vcf-midatlantic <vcf-midatlantic@lists.vcfed.org> wrote:
The CDL building is fully equipped with tools and electronics repair resources. Those conveniences are available to you as part of the $15 you pay per day for the workshop.
However, those resources may be limited due to the shared use of others who may also be using those resources. Many of us bring our own tools just in case, then utilize CDL resources for anything we don't have in our personal collection of tools.
Also, it never hurts to ask others to borrow their tools. Just be respectful whether they lend them to you or decide they don't want to lend them out.
See you at the Workshop!
Jeff Salzman
On Wed, Jan 3, 2024, 7:19 AM Ricardo 8-Bit Desk via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
Software development for the whole life (started with the good old ZX81). And electronics/retro fixing on the last 4 years. Still learning😁
Do I need to bring any tools or are we filly equipped there?
Ricardo.
Sent from my iPhone
On Jan 3, 2024, at 2:11 AM, Neil Cherry <ncherry@linuxha.com> wrote:
On 1/2/24 19:12, Ricardo 8-Bit Desk via vcf-midatlantic wrote:
Ricardo, not sure of your background, mine is in software and hardware so it come a bit more 'natural' to me. It's not natural until one learns the details. Good news is that if you ask folks can help.
I have no idea what state the computers are. I know for sure they need a good test on their power supply to start with.
NJ, definitely NJ (yes, bad joke).
My knowledge of Apple II is very limited (more of a Commodore person) but I could NOT resist those last time I was in Brazil. I will try to be there around 9-ish on Saturday.
I won't be there until Sunday, sorry.
See you all there!
Suggestions (some folks may correct them or have much better ideas):
Check your power first, always. Then a quick check of the CPU clock and see if the address are changing (both with an oscilloscope).
Tied the data buss to $EA (NOP) should step you through each address though it will start at $EAEA (I think). I think you use a few resistors on the data buss to pull the bits to 1 (1110 1010 - D7 - D0). At the ROM socket would probably work okay. Might need to pull the RAM to check this.
Others will be able to help further at the workshop (and may have diag ROMS to help).
Any Apple II, II+, or clone schematic will probably work okay for figuring things out but a bit of guess work will be needed. A quick search of the net should help. The operation of the Apple II will be very similar.
Weird, writing this down is making me think of how to debug my 68HC11 dev board. :-)
-- Linux Home Automation Neil Cherry kd2zrq@linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies KD2ZRQ
Jeff, Neil set up the stereo microscope for the re-work station. Next step is to move the equipment to an ESD safe table. Also put the IBM 9900096 Typewriter Repair Tool in the tool box in case someone needs it. Martin On 1/3/2024 8:25 AM, Jeff S via vcf-midatlantic wrote:
The CDL building is fully equipped with tools and electronics repair resources. Those conveniences are available to you as part of the $15 you pay per day for the workshop.
However, those resources may be limited due to the shared use of others who may also be using those resources. Many of us bring our own tools just in case, then utilize CDL resources for anything we don't have in our personal collection of tools.
Also, it never hurts to ask others to borrow their tools. Just be respectful whether they lend them to you or decide they don't want to lend them out.
See you at the Workshop!
Jeff Salzman
On Wed, Jan 3, 2024, 7:19 AM Ricardo 8-Bit Desk via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote:
Software development for the whole life (started with the good old ZX81). And electronics/retro fixing on the last 4 years. Still learning😁
Do I need to bring any tools or are we filly equipped there?
Ricardo.
Sent from my iPhone
On Jan 3, 2024, at 2:11 AM, Neil Cherry<ncherry@linuxha.com> wrote:
On 1/2/24 19:12, Ricardo 8-Bit Desk via vcf-midatlantic wrote:
Ricardo, not sure of your background, mine is in software and hardware so it come a bit more 'natural' to me. It's not natural until one learns the details. Good news is that if you ask folks can help.
I have no idea what state the computers are. I know for sure they need a good test on their power supply to start with. NJ, definitely NJ (yes, bad joke).
My knowledge of Apple II is very limited (more of a Commodore person) but I could NOT resist those last time I was in Brazil. I will try to be there around 9-ish on Saturday. I won't be there until Sunday, sorry.
See you all there! Suggestions (some folks may correct them or have much better ideas):
Check your power first, always. Then a quick check of the CPU clock and see if the address are changing (both with an oscilloscope).
Tied the data buss to $EA (NOP) should step you through each address though it will start at $EAEA (I think). I think you use a few resistors on the data buss to pull the bits to 1 (1110 1010 - D7 - D0). At the ROM socket would probably work okay. Might need to pull the RAM to check this.
Others will be able to help further at the workshop (and may have diag ROMS to help).
Any Apple II, II+, or clone schematic will probably work okay for figuring things out but a bit of guess work will be needed. A quick search of the net should help. The operation of the Apple II will be very similar.
Weird, writing this down is making me think of how to debug my 68HC11 dev board. :-)
-- Linux Home Automation Neil Cherrykd2zrq@linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies KD2ZRQ
participants (7)
-
Gregg Levine -
Jeff S -
Jeffrey Brace -
Martin A. Flynn -
Neil Cherry -
Ricardo 8-Bit Desk -
Sentrytv