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TashTwenty: Single-Chip DCD (Hard Disk 20) Interface
- Thread starter tashtari
- Start date
Zhinü
Well-known member
Man, I hope this comes out. I don’t use the TashTwenty because it doesn’t allow a pass through for a floppyemu.
MrTechGadget
New member
I'm having problems programming my PIC16F1704, Pickit3 is detecting, reading and erasing the chip but when trying to program the 20220621-1704.HEX I'm getting the following in MPLAB IPE v6.15
Is there something stupid I just don't know to set yet?
Is there something stupid I just don't know to set yet?
Code:
2023-11-04 12:43:41 -0400 - Programming...
Device Erased...
Programming...
The following memory area(s) will be programmed:
program memory: start address = 0x0, end address = 0xddf
configuration memory
program memory
Address: 1 Expected Value: 28a5 Received Value: 0
Failed to program device
tashtari
PIC Whisperer
My first instinct is to suggest this might be a power issue. Are you powering the chip from the programmer? If so, I'd suggest powering it externally - I've had issues with Microchip's programmers and powering circuits from them, even if the circuit is literally just the chip by itself.
MrTechGadget
New member
After trying again on a PC with the same results, I changed from clips to better connections and it flashed ok. disregard, looks like it wasn't a good enough connection to enter programming mode
Thanks Tash!
eldofever
Member
Just discovered this thread and was curious if the 'TashTwenty' with stepper motor actuation ever came to fruition? I've had an HD20 with bad drive here for 20+ years that would be ideal for this device. I'm no stranger to a soldering iron and SMD, but am not currently set up to program a PIC. I see a TT-Tiny for sale, but would love to get that audible stepper action.
Any updates?
Any updates?
micheledipaola
Well-known member
Working on it but need some info from the creator to complete. I just built one tonight to try out.
If you have a PICkit2 or 3, give PICkitminus a try for programming: http://kair.us/projects/pickitminus/
Worked great for reprogramming a 12F1840 based TashTalk.
Worked great for reprogramming a 12F1840 based TashTalk.
Thank you for all your feedback! First I tried pickitminus with my Pickit 3 and that worked! I could program the 1704.
The only problem is, that only some of my SD-cards could be used with the the sparkfun sd board. I knew about that problem, but had a little hope, that the 1704 could solve it. With the adadruit board all sd cards are working. And I tried a third sd board (see picture) and this board showed the same behavior as the sparkfun.
But I am happy that I can program the 1704 now. And with the adafruit board and an adapter cable (tashTwenty rev. 1) I can use all sd cards.
The only problem is, that only some of my SD-cards could be used with the the sparkfun sd board. I knew about that problem, but had a little hope, that the 1704 could solve it. With the adadruit board all sd cards are working. And I tried a third sd board (see picture) and this board showed the same behavior as the sparkfun.
But I am happy that I can program the 1704 now. And with the adafruit board and an adapter cable (tashTwenty rev. 1) I can use all sd cards.
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cheesestraws
Well-known member
This is a good tip - didn't know about this. Thankyou!
Been away from the Mac scene for a bit, but ran across this while working on the new Fujinet design. Nice work @tashtari Since my SmartPortSD with integrated DB19 connector fits so nicely on the back of a classic Mac, I did a quick respin of that design to turn it into a TashTwenty with an IDC-20 passthrough port so you can also hookup your FloppyEmu as a second floppy drive. The Enable pin (14) on the passthrough port is tied to pin 13 on the PIC as mentioned earlier in this thread. Sending boards off the JLC shortly, will share the design once I validate everything works.
tashtari
PIC Whisperer
In the builds department, @cheesestraws has come up with a design that allows TashTwenty to act as an internal hard drive on a Plus or 512ke, passing through !ENBL to the port on the back so you can connect a floppy drive (or more DCDs) to it! Thread here.
