+eebuckeye Posted April 3, 2014 Share Posted April 3, 2014 Any idea?? I can not find any markings.. Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/ Share on other sites More sharing options...
IainGrimm Posted April 3, 2014 Share Posted April 3, 2014 I think that may be a Quick Disk Plus with a custom cable, you can see it is an IDE cable, possibly didn't come with it Looking at it you could remove the cable and plug it in directly to the C64, you not got a machine to plug it into for a test? Looking through Zzap there is an advert for Quickdisc from Eversham Micros http://www.zzap64.co.uk/cgi-bin/displaypage.pl?issue=008&page=049&thumbstart=49&magazine=zzap Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2961836 Share on other sites More sharing options...
eightbit Posted April 3, 2014 Share Posted April 3, 2014 That is exactly what it is. It is like the other Fast Load carts. The red button resets to standard C64 basic (basically resets and turns "off" the cart). The cable was custom made for someone who probably did not have the space to reach behind the C64 to hit the reset button. My commodore is in tight quarters so that could be useful to me. If you are looking to sell it, PM me. Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2961951 Share on other sites More sharing options...
+eebuckeye Posted April 3, 2014 Author Share Posted April 3, 2014 Interesting... thanks! I'll try to mess around with it a bit.. is there anywhere I could find a manual? Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2961953 Share on other sites More sharing options...
hammerhead Posted April 3, 2014 Share Posted April 3, 2014 Is it really a Quickdisc+ ? Guess there may be different versions but the only ones I remember had the button on the face of the cart, not the end. Like this... Might just be a simple reset switch. Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2962036 Share on other sites More sharing options...
carlsson Posted April 3, 2014 Share Posted April 3, 2014 The extention cable probably origins from a three slot expansion device that I used to own a few years ago but can't remember what it was called. However according to original Commodore engineering expertise, the expansion port never was meant to be extended through a such extention cable, so YMMV a lot when it comes to how well it works and for how long. A bit of buffering of the signals would help improve the situation. Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2962127 Share on other sites More sharing options...
+eebuckeye Posted April 3, 2014 Author Share Posted April 3, 2014 (edited) Ok.. I hope this does not have a problem with my 128... Edited April 3, 2014 by eebuckeye Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2962164 Share on other sites More sharing options...
+eebuckeye Posted April 4, 2014 Author Share Posted April 4, 2014 Ok.. I gave it a shot... not exactly sure what it is still.. when you turn on the 128 and go into 64 mode the screen is black and a program loads automatically which seems to then execute the Load "*",8,1 command. I have attached a screen shot of the program that loads (with the disk drive off it gives an error. The red button is of course a reset... Does this make sense to anyone? Is this just a 'custom' cart which loads the first program on a disk and has a reset button? Thanks! Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2962214 Share on other sites More sharing options...
IainGrimm Posted April 4, 2014 Share Posted April 4, 2014 It literally looks like a disk fast loader seeing as it automatically runs that command, there were a few of these carts around at the time, stuff like the Action Replay carts had fast loader option but there were also dedicated fast load only carts like the Epyx one for example. Why not load a disk game and time it without the cartridge attached, then do the same with the cartridge attached and see if it loads up quicker. When you press the button do you get a menu or anything or does it just reset the machine back to Commodore Basic screen Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2962352 Share on other sites More sharing options...
carlsson Posted April 4, 2014 Share Posted April 4, 2014 It would be mildly interesting to see how the listing ends. The two PEEK addresses 915 & 916 should be in the middle of the tape buffer, which suggests that on power on, a machine code routine on the cartridge executes, reads some data from the drive and stores into those memory positions, then possibly puts the BASIC program into RAM and executes it. It looks like if you got more than 40 programs on the floppy disk, it would display some menu instead of just loading the first one? Also interesting to select a random value and let it depend on whether the name of the programmer should be displayed or not. If I recall correctly, RND(0) will yield a deducable series of random numbers, while RND(1) is somewhat more random? RND(-X) would reset the seed for the random number generator. As this runs on power on and relatively automated, I'm not sure if the RND will yield different results, perhaps the more files on the disk, slightly more time passes to read the amount and it would make a difference. Anyway, it should not really be of any importance. Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2962364 Share on other sites More sharing options...
R.Cade Posted April 4, 2014 Share Posted April 4, 2014 Hmm... MegaSoft Super Load? Jim Drew might know something about this since he was involved with Megasoft back then and is around again. Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2962410 Share on other sites More sharing options...
R.Cade Posted April 4, 2014 Share Posted April 4, 2014 Can you save the BASIC program and post it here? Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2962411 Share on other sites More sharing options...
R.Cade Posted April 4, 2014 Share Posted April 4, 2014 Can you save the BASIC program and post it here? Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2962412 Share on other sites More sharing options...
+eebuckeye Posted April 4, 2014 Author Share Posted April 4, 2014 I would certainly like to save the basic program.. How should I do that? I assume a SD2IEC would work but I have not received it yet (hopefully soon!!). I gladly will post it once I know how. Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2962598 Share on other sites More sharing options...
+eebuckeye Posted April 6, 2014 Author Share Posted April 6, 2014 Ok.. I could not find a good way to save the program so I have multiple screenshots which show the entire listing.. Anything helpful?? Thanks! Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2963527 Share on other sites More sharing options...
carlsson Posted April 6, 2014 Share Posted April 6, 2014 Not sure, I didn't study it in total detail but the program looks like it has special cases for loading ROM images (cartridge dumps) and programs that start below BASIC, usually autostarting ones. Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2963566 Share on other sites More sharing options...
JimDrew Posted April 7, 2014 Share Posted April 7, 2014 Hi... that was done by Bob Scheffler. That might actually be a prototype setup. It was not uncommon for us to use an extension cable like that when working on prototypes because we worn out cartridge ports quite often before we went this route. I don't know how many insertions the C64 cartridge port was good for, but I can tell you after a few hundred times they didn't work reliably and then we were chasing our tails trying to figure out what 'coding' issue existed when one of the address or data lines was not making good contact. Post a picture of the insides to that cart. Maybe I can tell you something about the hardware. Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2964358 Share on other sites More sharing options...
+eebuckeye Posted April 8, 2014 Author Share Posted April 8, 2014 Interesting.. does not look like much is in the cartridge... Any new thoughts? Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2964685 Share on other sites More sharing options...
JimDrew Posted April 8, 2014 Share Posted April 8, 2014 That is definitely a prototype. No commercial product is hacked together like that! Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2964807 Share on other sites More sharing options...
+eebuckeye Posted April 8, 2014 Author Share Posted April 8, 2014 So this would be a Megasoft Super Load proto? Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2964900 Share on other sites More sharing options...
carlsson Posted April 8, 2014 Share Posted April 8, 2014 Does the small 74 series chip lie loose on the circuit board, pins bent upwards? I suppose when assembled, it would then rattle a little if you shake it carefully... doesn't seem like production grade. Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2964908 Share on other sites More sharing options...
+eebuckeye Posted April 8, 2014 Author Share Posted April 8, 2014 Definitely not production grade.. just wondering if it is definitely a Megasoft Super Load. I can not find any documentation online either. Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2964923 Share on other sites More sharing options...
JimDrew Posted April 10, 2014 Share Posted April 10, 2014 (edited) This is something that Bob did apparently. He worked on a few Megasoft things. This was never sold as far as I know. Typically, we glued the 74xx chip upside-down with CA (super-glue) and soldered wires. There should be no rattling of the chip because it should be attached permanently to the board. I have several carts made up like this for changing the address scheme easily during prototyping. Edited April 10, 2014 by JimDrew Quote Link to comment https://forums.atariage.com/topic/223897-what-is-this-for-my-commodore/#findComment-2966317 Share on other sites More sharing options...
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