[vcf-midatlantic] Bunch of Apple II clones for repair

[Martin A. Flynn]

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 at 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 at 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 at linuxha.com
>>> http://www.linuxha.com/                          Main site
>>> http://linuxha.blogspot.com/                     My HA Blog
>>> Author of:        Linux Smart Homes For Dummies   KD2ZRQ
>>>
>>