Posted By
C=Owl27
on 2020-09-30
03:01:51
 |  Re: 364 Voice Rom in Plus4?
Thank you siz for the information.
If I burn the diag264, and replace the 3+1 rom with it,
would it load up by using the same F1 command?
Or would something else need be edited elsewhere?
I need to replace the onboard software in mine anyways
as it doesn't work at all, in my Plus 4.
-
Small update on my power supplies,
I used an 8 pin din and yanked out all the pins accept for 4 of them.
And this fit perfectly into the Plus 4 power socket.
From there I wired up my two external modern power supplies
for the 5vdc and 9vac.
I also made a proof of concept Plus 4 saver.
I didn't have any protoboards to solder to,
so I made it a sort of floating component cage around the relay.
And I don't presently have a variable power supply to test it,
But the LED is green when I plug 5 volts into it,
and red when I hooked up by large blocky 6volt battery to it.
I guess that is kind of a test.
However I think the I/Cs damage at 5.5 volts?
But too many leads were floating exposed in the air
so I used a over zealous amount of hot glue to insulate everything.
A little overkill but the glue glows in the LEDs.
Now its a magic glue ball saver.
When I get proper prototyping boards I will make another
and show it off.
The next project was an S-video cable.
But I followed the C64 tutorial for it.
DON'T FOLLOW THIS TUTORIAL!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
I almost destroyed my precious plus 4.
So in one of the pins on the C64 video socket is an audio input
for the SID chip.
The tutorial believed that it actually causes some distortion to picture,
and they suggest sending that pin to the ground.
And in my example I did just that.
When I plugged it in the picture was scrambled.
After quickly removing the cable I returned to the regular RF modulator.
It too had the same distortion.
But I pushed the reset button and the picture returned to normal.
As normal as it could be on the crappy TV I was using.
Doing some more research it turns out that this pin on the Plus 4
IS ACTUALLY ANOTHER AUDIO OUTPUT!
Not the SID's version of input.
I should have known better since the Plus 4 doesn't have a SID.
Well in attempt two I put a resistor in the chroma and another going to ground for good measure.
Then plugged into the S-video, turned on.
WOW! What a picture. I had never seen such a clearer picture on a Commodore before.
I also made some audio hookups and typed out some programs from the manual.
They sounded great.
Accept the last one called the great music machine.
Or great plus 4 music machine.
There were a couple typos in it.
Never fully got it to work accept for number 9 press.
I vaguely have childhood memories of typing out the same program
and also experiencing the same result..?
The cable also used the 8 pin din,
but they were a circle instead of a horseshoe like the plus 4 has.
No matter, I yanked out the top two pins with needle nose pliers.
Plus 4 does not use them anyways.
Then it fit. I plugged it into a female socket that came with it
in order to keep the pins from migrating while I soldered to them.
Never would I have imagined seeing the Plus 4 which such clear picture.
-
That is too bad about the v364 hardware.
I wonder if somebody has made an expansion for it?
What gave me the idea for replacing the built in software,
I read here on plus 4 world about the supercart,
and how the Plus 4 was an advancement toward hot swapping built in software.
Mine built in software doesn't work,
so why not make it something else?
So far I have found no tutorials for burning plus 4 carts.
(I'd like to make some game cartridges)
I ordered several blank cartridge boards, sockets and some W27C512 chips.
A cheapo burner made of chinesium.
But about the 3+1 I'm hoping the w27c512 is a suitable replacement.
And the same pins and whatnots.
|
