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Re: STOCK MEGA4 16MHZ V1.5 BOOSTER INSTALL
Posted: Fri Nov 16, 2018 5:14 pm
by exxos
PaulJ wrote: ↑Fri Nov 16, 2018 5:12 pm
Yup machine has "Joe Master" caps. Doesn't get any better than that.. Probably means this was a master computer at some point in its life!!
Might be friends with Jeff the resistor...
Re: STOCK MEGA4 16MHZ V1.5 BOOSTER INSTALL
Posted: Fri Nov 16, 2018 5:59 pm
by PaulJ
Re: STOCK MEGA4 16MHZ V1.5 BOOSTER INSTALL
Posted: Sat Nov 17, 2018 2:09 am
by PaulJ
Snows done so time to get the old processor out with screwing up the board. Clipped all the pins after unsoldering the small daughter card.
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Ok, guess I'm committed, old 68k has been chopped out leaving only its legs.
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Pulled all the legs out one at a time, heated up and used a pair of tweezers to remove the pin. Started cleaning out the holes with solder wick.
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Attempted cleaning on all the holes, a few where stubborn so I'll catch them when I turn the board over.
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Cleaned the board with alcohol, an acid brush, and some alcohol wipes.
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Re: STOCK MEGA4 16MHZ V1.5 BOOSTER INSTALL
Posted: Sat Nov 17, 2018 2:37 am
by PaulJ
Re: STOCK MEGA4 16MHZ V1.5 BOOSTER INSTALL
Posted: Sat Nov 17, 2018 3:10 am
by PaulJ
Re: STOCK MEGA4 16MHZ V1.5 BOOSTER INSTALL
Posted: Sat Nov 17, 2018 9:45 am
by exxos
Re: STOCK MEGA4 16MHZ V1.5 BOOSTER INSTALL
Posted: Sat Nov 17, 2018 11:33 pm
by PaulJ
Day later and still running fine. Took care of the power supply interference.
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Re: STOCK MEGA4 16MHZ V1.5 BOOSTER INSTALL
Posted: Sun Nov 18, 2018 11:05 am
by exxos
Would it fit without the shifter being in a socket ? Also if the buffer board in a socket ? I half recall it probably would just fit under the OSU if it was all low enough.
Re: STOCK MEGA4 16MHZ V1.5 BOOSTER INSTALL
Posted: Sun Nov 18, 2018 1:56 pm
by PaulJ
exxos wrote: ↑Sun Nov 18, 2018 11:05 am
Would it fit without the shifter being in a socket ? Also if the buffer board in a socket ? I half recall it probably would just fit under the OSU if it was all low enough.
Yes, if the shifter and gal were soldered in the clock fix board it would fit under the power supply I believe. However I don't think you could shoulder the clock fix board in the main board because the OSC is to high. Maybe if you had a good thin insulator to put on top of the OSC. When you make the board you could move the shifter and gal toward the DMA chip a little and that would work. I see have a number of boards to that's most likely no an option.
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Re: STOCK MEGA4 16MHZ V1.5 BOOSTER INSTALL
Posted: Sun Nov 18, 2018 2:13 pm
by PaulJ
The sockets that the flash rom card plug into are ruined because of the rom adaptors with the huge pins were plugged into them. I would normally just solder the fast rom card in but I'm thinking about working on the diagrom code and I don't want to burn proms every iteration so I'm think of buying another OSTRICH so I can provide 16 bits of rom instead of 8. I used the pictured OSTRICH to debug some 6809 rom code. You plug it in the rom socket, download code and it emulated a rom. Its built to plug into a auto computer and debug its code but it worked great on the 6809 computer I have.
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