Martijn van Buul wrote: > Somehow, I don't understand how a "1570" board ends up with a new ROM.. I have at least two of those boards, and all were in 1571 drives. All my 1570 drives came with a board labeled "1571" ;-) If you examine the "1570" board closely, you will see that all the traces that have to be cut for the 1571->1570 conversion are already open, the points where the wires have to be connnected to have white arrows and so on. To make that board work in a 1571 again, all that has to be done is put bridges over the open traces. One nice change is that diode that is always connected to one of the transistors near the R/W head plug: They put it into the board layout, finally. Oh, I forgot: The 1570 doesn't have the transistor for 5V/12V selection on the stepper motor. But this is also just a manufacturing option, like the jumper wires and the different ROM. Nicolas - This message was sent through the cbm-hackers mailing list. To unsubscribe: echo unsubscribe | mail cbm-hackers-request@dot.tcm.hut.fi.
Archive generated by hypermail 2.1.1.