Apple Macintosh Classic II

Model M4150 (for UK), 4MB RAM, 80MB SCSI HDD. System Software B1-7.0.1. It was used as a word processor primarily around 1995.

ToDo

try out Ethernet
find a toolchain
MacTerminal

Repairs

floppy drive eject mechanism has been cleaned and oiled;
CMOS battery has been replaced;
CRT has been adjusted to fill the screen;
unclogged and refilled printer cartrige;
memory upgraded to 10MB;
FPU installed;
SCSI hard drive is replaced with the [BlueSCSI];
Iomega Zip 100 to transfer files.

Necessary Macinstosh software

For clean System 7.0.1 I found this software useful

Simple Text in addition to TeachText.
StuffIt Expander 5.5 for System 7 to unpack .sit.hqx;
Disk Copy 6 to open images.

Interoperability

Macintosh relies on multi-stream files on filesystem, which makes file exchange a little cumbersome. It's best to keep files either in text, .hqx or Apple Double, binary representation.

What works:

1.4M floppy and Iomega Zip drives are readable on linux, and contain hfs filesystem;
unar can handle both .hqx and .sit to peek into its content, and extracting streams as separate files;
MacTar works just fine;
The Unarchiver for Mac OS X opens .sit just fine;

What's somewhat works:

Compact Pro 1.51 can handle packing large archives (10Mb, 600 small files), however there are no modern unpackers;
small ZIP archives can be created with ZipIt 1.3.8;
fondu can create AppleDouble binary files from resources;

What didn't work:

can't reliably handle 800K floppies on PC;

Connectivity

The only readily available option is Macintosh Serial to RS-232 Null-modem adapter on 57600bps.

ZTerm 1.0.1 works just fine, note that it configured for software flow control instead of hardware one that used in linux by default;
to setup terminal, run agetty --local-line -hm 57600 ttyUSB0 vt100;
rzsz gives ability to exchange files over serial connection;

Networking

For System 7, MacTCP 2.0.x, MacPPP 2.0.1, and a minimal pppd setup is enough. The only needed configurations are the next.

For /etc/ppp/options:

proxyarp
auth
<local-ip>:<remote-ip>

And for Macintosh, a domain name resolver in the MacTCP control panel. Reboot is required to apply the changes.

NCSATelnet takes ~600kB RAM and also supports FTP;
NCSAMosaic 3.0 supports HTTP/1.0 and gopher, takes about 4M of RAM;
MacWeb supports HTTP/1.0 and gopher, no images tho;

I found a few resouces: