• Updated 2023-07-12: Hello, Guest! Welcome back, and be sure to check out this follow-up post about our outage a week or so ago.

Networking on LC III with ethernet card

agent_js03

Well-known member
Hi everybody,

I am trying to set up my LC III for networking and I can't seem to figure it out. It has an ethernet card in one of those weird pre-PCI slots (are they called NUBUS or something else?) I think the brand is Farallon or something, I had downloaded the driver and installed it on there.

Let me go through the list of things I have done, maybe I did something out of order.

1. I originally did a clean install of Macintosh System 7.5 (not 7.5.3, just 7.5)

2. I installed the ethernet driver.

3. I installed MacTCP

4. I ended up upgrading to Mac OS 7.6, because for some reason there is some kind of bug with 7.5 where the operating system always uses all the RAM save for 5MB, which is not enough to run any kind of browser.

5. Since I have 7.6 and TCP/IP, I uninstalled MacTCP.

So now I configured the ethernet manually and have it plugged into my switch, which is connected to a bunch of raspberry pi devices that I have various uses for. I have one that runs a simple nginx web server. No matter what I put into the URL it just times out.

I am stumped. Can someone point me in the right direction?

 

cheesestraws

Well-known member
You have got it set up to use Ethernet not EtherTalk, yup?

Are you seeing ARP for the IP you have given it on the r-pis?  Use 'arp -an' on one of the r-pis to find out.

 

agent_js03

Well-known member
Yeah it is connecting via Ethernet. I see that at the top of TCP/IP.

When I do the arp scan on the raspberry pi, I do not see any ARP entry for the mac.

 

agent_js03

Well-known member
I should mention that when I plug the ethernet cable into the back of the LC III I can see green lights blinking steadily. So I think the card should be good.

 
Last edited by a moderator:

cheesestraws

Well-known member
I'd suggest popping "MacTCP watcher" on the LC and see what it says.  Perhaps post a screenshot here.  It will tell you the kind of things that ifconfig will tell you on UNIX so it's really useful diagnostic output

 

Kaa

Active member
A blinking green light usually indicates that it is connected (cord plugged in) but not making a connection. The light should go solid green with a connection. I tried for a while with MacTCP but gave up on it. Install Open Transport 1.1.2 or 1.1.3 and use DHCP instead of manual. You also need to make sure that your switch is giving the connection 10BaseT at half duplex (your card might work on full duplex) and not tying to auto negotiate. As soon as I set the port on my router to 10Mbs Half duplex, the light on my card went solid and OT automatically got the IP settings.

 

Nathan

Well-known member
IDK about the LCI/II/III as I never got the card I have working on my LCII beyond maybe installing the drivers and a green light of some sort.

But I will note that I had similar trouble with my Power Mac 6100/66 not playing nice with a more modern 10/100 Mbps (Fast Ethernet) switch or hub, whereas interposing a 10 Mbps hub in between it and more modern hardware solved that problem (probably a similar auto-negotiation/duplex problem).

 
Last edited by a moderator:
Top