Completely Solderless Ultimate 1MB

[IndusGT]

Dropcheck has an adapter that can work with Candle's version of the Ultimate 1 mb to make it completely solderless:

 

http://www.bitsofthepast.com/?product=super-mmu-adapter

 

With Lotharek's version of the Ultimate 1 MB there may be a problem, as per Dropcheck( comments from the website):

 

"You may run into a problem. I know that the latest offering from Lothareks 1mb Ultimate version includes the resistor fix. My adapter board also has this fix for the older version that Candle originally released. The two resister fixes in series could be more resistance than is necessary. My adapter will definitely eliminate the soldering on the MMU socket and chip."

 

Anyway to get round this? I'll contact Lotharek to see if any mods can be made to his upgrade so it will be compatible with this, if not anyone have a spare candle's 1MB they are willing to sell?

 

 

 

[Rybags]

If Lotharek's U1Meg includes the resistors then you don't need that MMU board at all.

 

Where's the problem here? It's the preferable way to go since it's a more simple install.

[flashjazzcat]

There's no such thing as a completely solderless install anyway: 02, R/W, HALT and RST still need soldered wires.

[IndusGT]

There's no such thing as a completely solderless install anyway: 02, R/W, HALT and RST still need soldered wires.

 

I see, my bad, I went from this statement on the manual:

 

"It will completely eliminate soldering on the motherboard for Candle’s original Ultimate 1MB board. It does this by exposing the four connections to the motherboard and on the MMU chip itself. So you

have RD4/RD5 and S4/S5 that connect directly on the motherboard. You also have access to connect to the same pinouts for the MMU chip. I have also

implemented the resistor fix for Candle’s original version Ultimate 1MB board so you do not have to solder on the motherboard"

http://www.bitsofthepast.com/wp-content/uploads/2013/11/Super-MMU-Adapter.pdf

[Rybags]

Sort of misleading... but soldering the others to legs of ICs is less obtrustive and much easier to reverse.

[BillC]

For the other solder connections it's just connecting 4 wires to points on the motherboard. For the MMU resistor fix 2 traces to the cartridge port must be cut and resistors inserted across the cuts, there's quite a bit of difference for those inexperienced at such work. The easiest way I have found to do this is to heat up the trace with a soldering iron until it starts to delaminate then put pressure on the trace and move the tip sideways to break it. I have never damaged anything but the trace I apply heat to with this method, and only in the area where the heat was applied. This is similar to damage sometimes done to circuit boards, especially XE, when doing modifications/repairs. The resistor fix shouldn't need to be reversed if the U1MB is removed, I can't see why it would have any effect.

[flashjazzcat]

If you need the resistors and don't have the adaptor you can put them inline with the ribbon cable: no need to cut any traces. Vias on the motherboard make excellent connection points for the other wires, especially if you don't want wire hanging off socketed ICs.

[+Stephen]

This is how I did the resistors. It's a much better (and easier) solution than cutting traces.