Hello!
I've seen a recently sold IBM PC on ebay : https://www.ebay.com/itm/266730256428
and while it is listed in the offer that it's an IBM 4860 PC, while browsing its photos, one of the labels actually says IBM 4863 , but when googleing none of those two options result in such a computer that has two floppy drives. Does anyone know what exact model had this dual floppy setup?
Thanks
That second drive is not part of the original machine (4863 is the monitor for the 4860 computer, like the 5153 is the colour monitor for the 5150), but is in an expansion chassis. I'm no PC Jr expert, but judging by the "Quadram" logo on the second FDD, I'd assume it's a Quadram Expansion Chassis, probably the one described here: https://archive.org/details/quadram-quadjr-ex … ion-manual-1984
dionb wrote on 2024-04-21, 10:15:That second drive is not part of the original machine (4863 is the monitor for the 4860 computer, like the 5153 is the colour monitor for the 5150), but is in an expansion chassis. I'm no PC Jr expert, but judging by the "Quadram" logo on the second FDD, I'd assume it's a Quadram Expansion Chassis, probably the one described here: https://archive.org/details/quadram-quadjr-ex … ion-manual-1984
dionb has it exactly right, the top part was just one of the aftermarket expansion chassis you could get for the PCJr. You could get these from companies such as Legacy, Rapport (Racore), PC Enterprises and Quadram. The 2nd Floppy drive and memory expansion was the most common I have seen but you could also get one that added a hard drive.
As a kid my dad had the Racore 2nd drive expansion with 640k and the DMA option, I recently own 2 of these (unfortunately not my dads) both Racore and 1 with 640k and the other with 512k neither with the DMA option.
ah, I see, that answers the question, thanks a lot guys!
