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Yes, there is very complex design that delays incoming data and possible detects the speed of it (this last is only an idea). No the higher clock only goes to the Macintosh computer side, not the network. It was because of this statement and drawing, it shows the Macintosh computer able to...

Looking at de PAL dump, this line makes perfect sense : /o12 = i4, LED is on when there is some device writing data on the network.

Hi, I did a draft reverse engineering of the schematics based on the photo's and found some interesting things : 1. Of the differential transceiver SN75176 only the receive part is used, the transmitter is continues disabled (pin 3 to GND). This means the data is coming directly out of...

I'm building a small PDS board for my LC with wire wrap for fast debugging a proof of concept. Will be an GPIB controller with a simple u7210 chip, bare minimum address decoder (as done above). 1. Now I'm wondering if there is a difference in writing to the PDS I/O address space between the LC...

Hi Igjk1, Do you still have this card or the manuals please ? I would like to build a GPIB card for the LC and this would be a nice starting place Br, Steve

Hi MindWalker, I'm at the point to build my homebrew version of faster LocalTalk by using an external clock. I'm currently blocked at how to select the external clock, I made as small program but seems some driver is changing it also in the background. How did your machine feel like speed...

I was super happy today when I found an 256MB stick between some old stuff, but when I installed it, there was only 128MB detected. But 128 + 64 + 32 = 204MB should be enough to do some programming ? PS On my machine there is an free FDD power cable hanging lose and I have already the ZIP...

I'm also working on a beige G3 these days and was wondering about this connector : - there are to bays in the top plastic for an FDD, but the Apple floppy cable is only single device ? (on my LC there are 2 of those connectors). - maybe apple was thinking to have a double floppy option and for...

You will also need to add an extra power cable when using the PC style diskdrive ?

And 2 of these, only 32MB with 8 chips on both sides

My beige G3 has this stick of 64 MB, 4 chips on both sides.

Sorry for the confusion, but I'm not sure anymore how to call it now ... On the control panel I set AppleTalk active and then enable AppleShare, is this what you call LocalTalk ? Then I connect all my machine by the DIN 8 printer port. PS 1. I have been reeding the bible “Inside AppleTalk” for...

The clock is one of the differences between syn and async communication, but there is also the max length of one package. Async, most known as RS232 on PC, only supports on single character + optional 9th bit (mostly parity). Sync comm. has a much larger package size, I think on AppleTalk one...

I can only confirm this, I had the same issue with an LC and LC II, recapping worked for the LC II. The LC would still not boot, one of the cap had leaked underneath the keyboard chip, so I desoldered it, cleaned PCB and resolder, done.

Measuring power lines by Ohm will only show when there is a hard short, 1 ohm or below. It's sometimes a good indication sure, but another chip revision, empty/full cap can give a big different. Chips are active parts that need full 5V before they take full current. Better to have a external...

Found an alternative to the interface boxes and cabling, as these parts are not to be found in my country. Solder a couple of PS2 female connector in parallel, only 4 pins to solder on every connector. For cabling I used also PS2 cable (SVIDEO could also work) and broke away to plastic key so...

Does the B&W G3 than also support synchronous communication, what I found on the web is that the Griffin gPort only converts to RS422 signals ?

Some sad news, went to picked up the machine and it did not boot anymore ! Can power up the machine with the keyboard, HD spins for a couple of seconds and then nothing... After years not being used the owner booted it up to take some pictures to put on the bidding website, then the morning I...

Hi Robin, What is the current status please ? I currently have 6~7 Mac from SE to G3 in my collection that I would like to add to an AppleTalk network, share some drives ... Next I would like to connect and 68360 embedded controller (I designed HW with it back in the 90) to AppleTalk, it...

Thanks for that Phipli, I only found 1024x768 max on other sites. Yes 1280x1024 with 256 colors will be more then enough as desktop for programming tasks. So the standard 2MB will be good enough for now. My ultimate goal is to build a KVM so I can switch keyboard, mouse and screen between all...