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From: Clocky on 1 Aug 2010 03:07
Jim Brain wrote:
> On 7/31/2010 7:20 PM, Sam wrote:
>> Hello Don,
>>
>> I've modified the schematic from the link in your message.
>> The text is completely wrong and must be:
>>
>> A wire from pin 14 (GND) tot switch.
>> Two 4,7 K resistors from pin 28 (VCC) to pin 27 (A14) and 1 (A15)
>> A wire from pin 27 (A14) and pin 1 (A15) to switch
>>
>> You can find it here: http://www.siemappelman.nl/kernal.jpg
>>
>> You need a three-way switch or toggle switch with a free middle
>> position.
>>
>> A14 and A15 are high now on "my" schematic. In this situation Bank 4
>> is selected.
>> In position 3 A14 is high and A15 is low and Bank 3 is selected then.
>> In position 1 A14 is low and A15 is high and Bank 2 is selected then.
>> When you make A14 and A15 low Bank 1 is selected but you don't use
>> that.
>>
>>
>> Regards, SAM
>
> I agree the text is wrong (they meant A13 and A14, but even that is
> wrong, it should be A14 and A15. Clearly the text is from the 8K
> mapping).
> But, I fail to see, Sam, how your new schematic is different from the
> original in the first link? Both tie A14 and A15 high via 4.7K
> resistors, and tie those two lines to a STDT (ON-OFF-ON) switch, with
> the center as ground.
>
> Am I missing something?
>

If you are , I am too ;-)



From: Sam on 1 Aug 2010 06:38
You are right Jim and Clocky, schematics are equal but the switch in
the first schematic is very unclear in my opinion.

SAM
From: DMackey828 on 1 Aug 2010 19:22
On Sat, 31 Jul 2010 21:48:44 -0500, Jim Brain <brain(a)jbrain.com>
wrote:

>
>I agree the text is wrong (they meant A13 and A14, but even that is
>wrong, it should be A14 and A15. Clearly the text is from the 8K mapping).
>
>But, I fail to see, Sam, how your new schematic is different from the
>original in the first link? Both tie A14 and A15 high via 4.7K
>resistors, and tie those two lines to a STDT (ON-OFF-ON) switch, with
>the center as ground.
>
>Am I missing something?
>
>Jim


Hello Jim,
Much appreciated for the help, Pin 26 (A13) must be Connected to the
socket and NO Wire from Pin 26 to 27.

All three kernels are working. :) Thank you.

Basicly what I should have done was DISREGARD all the INSTRUCTIONS at
the bottom of the page. AND have NO Connection to the socket for Pin 1
(A15)

Damn, NOW what do I work on.. lol
From: Clocky on 2 Aug 2010 00:19
DMackey828 wrote:
> On Sat, 31 Jul 2010 21:48:44 -0500, Jim Brain <brain(a)jbrain.com>
> wrote:
>
>>
>> I agree the text is wrong (they meant A13 and A14, but even that is
>> wrong, it should be A14 and A15. Clearly the text is from the 8K
>> mapping).
>>
>> But, I fail to see, Sam, how your new schematic is different from the
>> original in the first link? Both tie A14 and A15 high via 4.7K
>> resistors, and tie those two lines to a STDT (ON-OFF-ON) switch, with
>> the center as ground.
>>
>> Am I missing something?
>>
>> Jim
>
>
> Hello Jim,
> Much appreciated for the help, Pin 26 (A13) must be Connected to the
> socket and NO Wire from Pin 26 to 27.
>
> All three kernels are working. :) Thank you.
>
> Basicly what I should have done was DISREGARD all the INSTRUCTIONS at
> the bottom of the page. AND have NO Connection to the socket for Pin 1
> (A15)

Well yeah, because I'm fairly certain grounding PIN 1 on the socket shorts
VCC to ground which isn't going to make anything real happy ;-)


From: Sam on 3 Aug 2010 07:48
I thougth "my" schematic was very clear DMackey828...

To the C64 only connect D0-D7, A0-A13, VCC, GND, VPP and CE.

SAM

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