Hi Mike, I bought in the U.S.A. Ray Carlsens power sources that are better than the stock C64 power sources, I have used this with my Ramlink and I really havent noticed any Data loss. I really dont use the Battery backup for the Ramlink was that mainly what you meant? So I guess I really havent tested that. The Ramlink is also compatible with GEOS,Wheels and Megapatch as far as creating the DACC partitions to use that RAM as the actual memory expansion, in doing this I really havent had any problems at all. The DACC software at least the one that came with my Ramlink seems to have a bug it will create the DACC but when it does that it has a syntax error in the program so have you ever tried the DACC partitions and the syntax error? I scored my Ramlink on Ebay in early 2008 got a really good deal on it. The only other problem brought out in the Ramlink users manual is the jumper clip that has to be installed or it will cause lockups, but I setup the jumper and it works quite well. Of course the jumper clip is different on the breadbin 64, C64C and the 128D. Overall I really like what you can do with the Ramlink but its a good think I scored my when I did people seem to be hanging onto them these days. I configured mine with 16mb of Ram. The Ramlink also seems to behave okay with the Super CPU as well. Thanks, Terry On Wed, Jul 28, 2021 at 1:40 PM Mike Naberezny <mike_at_naberezny.com> wrote: > Hi all, > > In the CMD RAMLink manual (4th Edition, First printing, February 1993): > > > http://personalpages.tds.net/~rcarlsen/cbm/misc/rl/CMD_RamLink_Users_Manual_4th_Edition_1st_Printing_1993_Feb.pdf > > There's a warning on page 23 about data loss when using the RAMLink with a > C64 > and a heavy duty power supply. It specifically calls out Commodore's own > 1764 > supply (in the USA, this supply is like the C128 one but with a C64 plug): > > "Note: RAMLink was designed to be used on 64 computers with an original > Commodore supply. If you have a 64 equipped with a heavy-duty power > supply > (as was issued with the 1764 REU) or some other after-market power supply, > you > may experience data loss problems with the RAMLink. Since RAMLink > provides > the power for an REU plugged into the RAM Port, use your original 64 power > supply when possible. To help cut down on the possibility of data loss > when > using other power supplies, use the recommended power-up and power-down > sequences with the heavy-duty and other non-original power supply types." > > It's understandable that CMD would recommend against using random third > party > supplies. However, I think it's interesting that CMD specifically warned > against Commodore's own 1764 supply. > > My guess is that it has something to do with the residual output of the > supply > after AC power is lost. I'm assuming the RAMLink has a circuit to detect > power loss and disable writes to the RAM, so the RAM can't be corrupted as > the > power goes down. If the 1764 supply outputs more residual power than the > original C64 supply after AC power is lost, CMD may have been concerned > that > their RAM-write cut-off may not function as intended. That is, however, > just > my guess. > > What are your thoughts on this warning and why it may exist? > > Thanks, > Mike > > -- > Mike Naberezny (mike_at_naberezny.com) http://6502.org > >Received on 2021-08-05 05:00:05
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