Racore Sidecar

Hardware questions and modifications

Racore Sidecar

Postby James » Sat Mar 21, 2015 9:13 am

Is the sidecar the same on the Racore Drive II (model 1500) and Racore Drive II with DMA (model 1501). I know the Racore Drive II with DMA comes with a floppy controller and different cables but is that the only difference?
-PCjr (1989)-DOS 3.3, Racore Drive II, jrIDE-128 MB DOM, jrExcellerator, Tandy Mod, Serial Card, Combo v2, Config Plus, IBM Parallel Port, Megaboard, Xircom PE3-10BT
-PCjr (2001)-DOS 3.3, jrIDE-128 MB DOM, NEC v20, Parallel Port, Comswap, Xircom PE3-10BT
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Re: Racore Sidecar

Postby Brutman » Sat Mar 21, 2015 9:24 am

The DMA chip is on the sidecar, so yes, they are different.

(I'm not sure if it is the same circuit board with just an extra chip populated or if the board itself is different.)
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Re: Racore Sidecar

Postby James » Mon Mar 23, 2015 5:55 am

After some further research it would appear it is the same circuit board. The difference being with the DMA version having the DMA chip, different jumper settings and removal of a terminating resister. Racore sold a kit that allowed a user to upgrade the Model 1500 to the Model 1501. They also put out instructions on how to disable DMA in the model 1501 in the event DMA was problematic. The other thing I found out is the DMA only works with the internal Racore Memory.
-PCjr (1989)-DOS 3.3, Racore Drive II, jrIDE-128 MB DOM, jrExcellerator, Tandy Mod, Serial Card, Combo v2, Config Plus, IBM Parallel Port, Megaboard, Xircom PE3-10BT
-PCjr (2001)-DOS 3.3, jrIDE-128 MB DOM, NEC v20, Parallel Port, Comswap, Xircom PE3-10BT
James
 
Posts: 111
Joined: Sat Dec 22, 2012 10:04 am


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