Quick iPXE script:
params && param vram ${vram} && chain -a http://b800.org##params && echo b800.org/${b800id}
usage details
Formats: b800 | b800hex | b800base64 | uri | html | ansi | ascii | utf8 | cp437 | cp437hex | png
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iPXE> ifstat
net0: 52:54:00:12:34:56 using undionly on 0000:00:02.0 (Ethernet) [open]
[Link:up, TX:74 TXE:1 RX:103 RXE:31]
[TXE: 1 x "Network unreachable (http://ipxe.org/28086011)"]
[RXE: 31 x "The socket is not connected (http://ipxe.org/380a6001)"]
iPXE> set b800public 1 && chain http://b800.org
http://b800.org... ok