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| TashTalk: Single-Chip LocalTalk Interface |
Posted by: Tashtari on 2024-01-18 05:27:32
Finally got a PIC programmer and updated to 1.0.1. This solved all lingering compatibility issues I was having with LocalTalk devices. Besides the PowerMac 6100, the v1.0 firmware was not working with the LocalTalk port on my HP LaserJet 4MP. This has now been resolved. Cool! Fingers crossed that that's it for TashTalk bugs. =)
Also, some TashTalk Hat kits are back in stock in case anyone needs one. |
Posted by: twelvetone12 on 2024-01-18 05:33:36 I hope to finally make it to test it in LT2USB this coming weekend, free time has been elusive lately. |
Posted by: NJRoadfan on 2024-01-18 19:23:56 Someone here (I think it was @LaPorta ?) had mentioned that their LocalTalk equipped ImageWriter II was throwing all kinds of errors with the TashTalk. Maybe the 1.0.1 firmware improved things? Anyone have an ImageWriter II to test? |
Posted by: LaPorta on 2024-01-18 19:33:22 My comment previously was issues we had testing the AirTalks and using the AT IWII. Unsure what the story is with TashTalk. |
Posted by: DiskJockey on 2024-01-20 10:11:40
Does anyone here have a TashTalk and one of the below machines?
-Centris/Quadra 660AV/840AV
-Power Macintosh 61/71/8100
-Power Macintosh 72/73/75/76/85/86/95/9600
If so, can you test and see if you TashTalk without the above upgrade works with your machine? The thing all the above machines share is the Curio I/O chip. Based on some research, this chip contains a Zilog "Enhanced SCC" core with some "custom" LocalTalk extensions added onto it. One of the features mentioned in AMD's datasheet and Apple's internal communications is the chip's ability to automatically send a sync pulse with any data transmission. This is very likely the source of the various compatibility problems. I have a centris 650 which fails almost all the time - got it to work one time only. Does this machine also use the chip above? |
Posted by: NJRoadfan on 2024-01-20 21:21:58 The Centris 650 uses a standard Zilog 8530 SCC to drive the serial ports. |
Posted by: Tashtari on 2024-01-21 04:45:50 Forgive the cross-post advertisement:
Do any of you TashTalk owners have an AppleTalk ImageWriter, too? I'm looking for someone who has both and is willing to perform a small experiment for me for another project I'm working on...
If so, I wonder if you might be willing to do me a small favor... I'm seeking a trace of the AppleTalk network activity between Mac and ImageWriter when a print job is being sent. There are a few different ways to collect such a trace: If you have an AirTalk and Mini vMac v37 with LToUDP, you...
68kmla.org
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Posted by: Phipli on 2024-01-21 05:02:34
My comment previously was issues we had testing the AirTalks and using the AT IWII. Unsure what the story is with TashTalk. The little 8pin socketted chip on the AirTalk is a TashTalk - it is that chip people are talking about. There was a recent firmware update that improves compatibility with first gen PPCs 🙂 |
Posted by: NJRoadfan on 2024-01-22 19:29:39 Found the post by @RolandJuno about the ImageWriter II TashTalk issues with logs, wonder if 1.0.1 would improve things:
That's a lot of framing errors. In order for TashTalk to flag a framing error, it has to have detected a zero on the line that it detects as the attempted beginning of a flag byte (0b01111110), followed by more than six ones, which seems a little too precise of an error to have been triggered...
68kmla.org
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Posted by: Tashtari on 2024-01-22 19:40:22 I'd like to see if the behavior changes with 1.0.1, but I'm not sure I expect it to. I'm still not sure what could be causing TashTalk to flag a raft of framing errors that way... |
Posted by: Tashtari on 2024-02-01 08:09:15 TashTalk 2 Hat kits are back in stock, and I'm also offering for sale a small number of fully-assembled and tested TashTalk 2 Hats for folks who'd rather not assemble their own and don't mind the extra cost. I don't know if I'll do another batch of the latter again, so get 'em while they're hot!
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Posted by: ecliptik on 2024-08-11 11:00:48 Any plans for a TashTalk restock on the kofi store? I will buy at least 2 kits and a phonenet kit for a 512ke. |
Posted by: Tashtari on 2024-08-11 18:32:37
Any plans for a TashTalk restock on the kofi store? I will buy at least 2 kits and a phonenet kit for a 512ke. Should be soon, I've got the PCBs and I've ordered parts, so maybe a week from now. Will post in this thread when they're available again. |
Posted by: Tashtari on 2024-09-09 10:06:44 TashTalk 2 Hat kits are back in stock again in the Ko-fi shop! If you're interested, please get your orders in this week - after that, shop is going to be temporarily closed until the beginning of October. |
Posted by: Andrew on 2024-12-21 03:01:19 Hi all,
do you know if tashtalk hat v1 supports low level programming? Trying to update firmware using the raspberry pi zero using the guide here:
www.pedalpc.com
Do you know if this will work, or is pickit3 the only option?
Thanks |
Posted by: Andrew on 2024-12-21 04:10:21
Hi all,
do you know if tashtalk hat v1 supports low level programming? Trying to update firmware using the raspberry pi zero using the guide here:
www.pedalpc.com
Do you know if this will work, or is pickit3 the only option?
Thanks Responding to my own post, I am coming to the conclusion that lvp is disabled on this pic chip. I have a ST-Line v2 and some bluepill boards. Could I maybe use those somehow? |
Posted by: Tashtari on 2024-12-21 07:07:37
do you know if tashtalk hat v1 supports low level programming? It doesn't, unfortunately - low-voltage programming requires that the RA3/!MCLR pin be used as !MCLR (reset), but TashTalk 1.x uses it as the LocalTalk input, so any PIC that has TashTalk 1.x on it will have low-voltage programming disabled (and it cannot be reenabled without use of a high-voltage programmer such as the PICkit). TashTalk 2.x should support low-voltage programming since it uses one pin for both LocalTalk input and output and uses RA3/!MCLR as !MCLR, but I've never tested this... perhaps I should. |
Posted by: NJRoadfan on 2024-12-21 11:19:53 Cheap generic PICkit clones have no problem programming a TashTalk. I managed to get one for under $20 on ebay. |
Posted by: Andrew on 2024-12-23 10:20:50 @Tashtari, @NJRoadfan thank you for your replies. I bought a pickit 3 and managed to load version 1.01 successfully. Unfortunately it did not solve the problem that I had since day 1 of owning the tashtalk hat. Let me explain: I have a physical mac se 30 hooked up to a tashtari hat running tashrouter, and a mini vmac speaking ltoudp. Both vmac and se30 see both zones. Mini vmac can access shared folders on se30 but after some time starts to lag and fail. SE30 cannot connect to mini vmac shared folder, it times out right before asking for password.
Do you have any ideas? Using latest version of tashrouter.
Log FIle: https://pastebin.com/Rv27Me98 |
Posted by: Andrew on 2024-12-23 11:10:41 Edit time is over: Log is here:
2024-12-23 20:23:15,886 DEBUG: frame out LToUDP 255 254 type 01 b'\x00$\x02\x02\x02!\xc2\x00\x02\x16\xfd\x00\x01=\tAFPServer\x0bDanger Zon...
snippet.host
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