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Michael A. Terrell wrote:

set of dealer handouts for the C128, the 1571, and the never released
1572 dual, double sided drive.

you have the flyer for the 1572, or a prototype unit? :)




The prize in my Commodore Computer collection is several working SX64
computers, with all the cables and accessories. I used a SX 64 with an
external modulator for a TV color bar, gray scale, and cross hatch
generator.

Oh yeh, I have 2 SX-64s here. My dad has 3.

Great little machines, I prefer the c128 though.



Have you replaced the 4416 16K*4 video RAM in a 128 with the 4464
64K*4 RAM? You can either use it to store multiple screens, or access

Not yet, but the 4464s are sitting on the bench. Im deciding whether to
simply replace the chips in my c128s (I have a couple), or whether to
design a piggyback PCB (like the ones made in the late 80s). If I do
that, maybe 4464s arent the best thing to use.

Decisions decisions.


The VDC only addresses 64 K of RAM, so its the logical choice. BTW,
the VCC and GND pins are soldered to heavy traces so the easy way to get
them out is heat the pin from both sides, the bottom side with a vacuum
desoldering iron. i think i converted about a dozen. The C128D came
from the factory with the 4464 chips.

If I make a piggyback PCB I dont need to unsolder the 4164s, and the VDC is
socketted from memory :)

I might make a small run of PCBs made professionally and send the surplus to
Ray Carlsen for his distribution. Again, so many projects, and time is
short these days with work and family.




Did you ever use the original version of Disk Doctor for the
Commodore computers? It is a neat little sector editor that can be used
to do all kinds of things to Commodore floppies. It was released for
the 1541 and older drives, then abandoned. I used it to modify a second
copy of Disk Doctor to work with the 1571 and 1581 drives.



Havent seen it.
.

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