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If you have a moment to test something :) I've been working on a module that adds an integrated AirTalk using the modem port of the 1xx (except the 190) series PowerBooks (see here). It works beautifully on my 100, but not on my 150. What does not work? Well you need an extension to enable...

I recently played with a reader called "nuntius", it is on the garden. Works with system 7 but I did not test it in 6.

I'm making progress in building all 5 units if people want to give them a try :) for the moment it works perfectly on the PowerBook 100 but not on the 150.

The previous owner of my 150 quite literally bolted the hinges back together! He told me he did it already back in the 90s. This 150 loses pièces every time I touch it.

Yes yes I mean the same, I can already explore the disassembled code with Resourcer.

Upping this, I too would be interested on how to disassemble code resouces!

I wonder if it is possible to do LocalTalk on this adapter. It has an awful lot of transceivers! The market it for the PowerBook 150, and with my machine the network control panel refuses to switch LocalTalk to the modem port. I see they had a control panel for this adapter, so I wonder if they...

I mounted and tested a second one, and put it in my PowerBook 150, but it does not works :( Well, the module itself does seem to work, but LocalTalk refuses to switch to the modem port, so I cannot do anything. I will dig more into it, the 150 is quite different from the other 1xx and maybe it...

Super! Thanks to you for looking into this. I fixed the other problems with the boards and I will order them this week.

If I got my reading right, it is around 1.8uS: And here is the clean view:

Ok, I reprogrammed the pic and it works perfectly! I'm transferring files and printing. Thank you very much for this! I want to run some more tests, like using a serial cable instead of the two phonenet adapters, but I think it is ok. Il will order new boards fixing the problems this one has...

Cool! Thank you very much! I will try to test it this night if I make it or tomorrow morning. The scary part is that I need to desolder the PIC and I need to be fully awake for that :)

Mmmmh ok I see (and I tried the pullup and did not work lol), but maybe a transistor could do the trick? Basically it removes one of the two tranceivers from the bus when the LTEN pin flips?

If I understand correctly, the problem is that TT switches to input and then the pin goes high? What if we add a pullup?

Super! I'm really curious if you find anything, I'm really out of ideas right now.

I'm wondering if adding a buffer that selects R or D makes any difference, but I'm not sure, since the datasheet says R is high Z when RE/ is high, and D is ignored with DE low, so it really should make no difference. I'm confused.

The RPi hat finally made it here! So I immediately got to misuse it: I lifted the LT io and LTEN pins, and used the transceiver there. Guess what? It works. So I think there is something with the two transceiver setup that does not work. My guess is that something happens with the shared io...

Well I can look into that, but I don't have a portable to try it on! It should work on all the 1xx family except the 190. I will build a second one to test on my 150 and see what happens.

Could it be because I have the two tranceivers? What could inhibit TT from sending data? In would imagine the serial part with the PC works, because it needs to receive my packet to send RTS and wait for CTS right? Does it do any manipulation of the incoming packet? I'm trying to narrow down...

Ok I mounted a second one, I made sure all the wrong connections were fixed before power, and I get the same result. If I set the node bitmap, I see 17 RTS -> CTS If I set the bitmap to 0 on the receiver, I get 32 RTS and no response (which I right I think?) I really can't put my finger on...