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MK14HAK wrote:Buy why wouldnt one just use Cegmon @ $F800 these days ??

I am kind of a purist. sigh. I should probably learn about it, though.

/Jeff

Hi Dave, I compared your "Default" wiring denoted in yellow above to my 505 board, and I'm not sure I understand your logic. My C4PMF is jumpered like this: Jumpers for C4P Disk System.jpg $FFxx Points to page 0 - 'H/D/M' (Pink) $FExx Points to page 2 - 65V monitor (Orange) $FDxx Points to page 1 - ...

Hi Dave, I have been looking at this as well as the SAMS schematic for the 505 ROM. Am I correct that there is a second step of cutting the trace to R54, the pull up resistor for the page you wish to re-assign, and, attaching the old, now unassigned page's pin to that resistor? 505 Monitor ROM.jpg /...

I replaced two of the OSI power supplies in my C4P with one of these: http://www.ebay.ca/itm/350851562926?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649 I used one of these to power my Superboard II: http://www.ebay.ca/itm/5V-5A-25W-DC-Universal-Regulated-Switching-Power-Supply-Transformer-Adapt...

Thanks. I will be sure to check that!
/Jeff

This might sound silly, but I recently set up my C4P and for at least 15 minutes it had me fooled because I plugged the monitor into the wrong RCA jack.

/Jeff

Thanks all. Im thinking that maybe, if there is interest, I would plot out a new 540 keyboard board that uses new key switches, but our original key caps onto a new PBC. Then buy some new keyboard switches and populate it with them (like the SB ///). That way we could just build it up and replace th...

What I am hoping to do is to have one of these for my C1P, and then somehow adapt the design for the 48pin backplane and add a 8K EPROM with BASIC IN ROM to my C4PMF (abandoning the floppy that I cant get going!!), and probably replace the 48K of 2114 RAM with newer chips that are more reliable and ...

Interested! I wonder if this can also be adapted to the C4P. I have one of those with only 8K as well! /Jeff If the pin-out of the C4P expansion socket is the same as the C1/SB and it's memory map is open from $2000 to $9FFF, then it should work just fine. Keep in mind, pin-11 of the expansion sock...

Mark, do you know what those white bus connectors are called and if they are available to buy still?

Also, do you have any info on PBC houses that do one-offs at a reasonable price?

I'm sure you know what I am thinking!