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gbos picked up an IRC server (and httpd before it), which is a much better
advert for the lab than `ls`: one Game Boy runs the daemon, another connects
over the virtual switch. Verified on the live site end to end - GB0 `ircd &`,
GB1 `irc 10.0.0.2 gb1`, `/join #gb`, and the message lands:
`<gb1> hello from sl0p.foo`. The header now suggests exactly that, plus the
httpd/wget pair.
Two display fixes fell out of running it:
- irc(1) is a colour client, so the console mirror was printing raw CSI
sequences as "[44m[37m..." - the decoder dropped the ESC byte but kept
the rest. It now tracks ESC / CSI state and discards the whole sequence.
The LCD still renders the colours; only the plain-text mirror strips them.
- the LCD is 40 columns, so full-width output (irc's status bar) arrives
space-padded. The mirror isn't column-aligned, so it squeezes runs of
whitespace and drops lines that were nothing but padding.
The ROM itself isn't vendored here (it's a build artifact of ~/dev/gbos that
deploy.sh ships), so this commit is the page copy and the decoder.
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/net.html plugs Game Boys into a switch that leases them addresses and routes
between them: add one, add another, and they ping each other. Unplug either
and its address goes back to the pool for the next one.
web/gbhub.js is tools/gbhub (gbos) ported to the browser - SLIP framing, DHCP
OFFER/ACK, unicast routing, broadcast flooding and ICMP echo for the gateway.
It deliberately has no uplink: NAT needs a TUN device and a tab has no raw
sockets, so packets addressed off-net are dropped and logged as "no route"
rather than pretending.
web/gbcore.js wraps one wasm instantiation as a GameBoy object. Several Game
Boys are several instantiations of the same compiled Module - the core keeps
its machine in a static, so each gets its own linear memory and is isolated
for free. Measured 12.3x realtime per instance, so the page caps at 6.
Each card gets a text input, because unframed link bytes are console I/O: it
lands on the shell's stdin like tools/gbtype, so you can run `ping 10.0.0.3`
without the on-screen keyboard.
Verified headless (node, two Game Boys through the hub: 2/2 leases, ping
4/4 received) and in headless Chrome against the live site: 4 Game Boys at
60fps each, leases .2-.5, typing into a card's console pings another, unplug
frees the address and a replug reclaims it, no exceptions.
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