Hi Earl,
The only things I can think of to try are:
1. Ensure the battery is not weak (or plug the NADSBox in to DC power).
2. Try a different SD card.
3. Try to reflash the PIC processor's firmware. This means:
a) Remove the 4 screws (two in the battery compartment).
b) Remove the jumper from the pins labeled GND (maybe this is on J8?)
c) Install that jumper on the 2-pin header labeled "Recover" (I
think it is J5 maybe?).
d) Cycle the power off then on.
e) Watch the blue LED blink quickly a bunch of times.
f) When the LED stops blinking, remove the jumper from "Recover" and
put it back on the GND pins (for storage).
g) Put the unit back together and replace the screws. Note that the
insert with the SD card slot should be installed with proper
orientation. The slot should be near the bottom of the enclosure and
the 4 round machining marks should be on the inside of the enclosure.
If none of these fix the issue, then I'm not sure what else it could be.
Ken
On 12/30/16 2:33 PM, Earl Evans wrote:
Hi all,
I've got a NADSBox, and it's not working so well. I get intermittent
but frequent checksum errors when moving files either direction
between RAM and DISK (using TS-DOS). Tried this on two different
machines, and also tried a different cable. I also reformatted the SD
card.
Both of the aforementioned machines (M100 and PC-8201A) work OK with
LaddieAlpha.
Any ideas what to do next? I'm hoping it isn't permanently broken.
- Earl
