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
UNDI device is PCI 00:02.0, type DIX+802.3 625kB free base memory after PXE unload iPXE initialising devices...ok iPXE 1.21.1+ (ge09e1) -- Open Source Network Boot Firmware -- http://ipxe.org Features: DNS HTTP iSCSI TFTP AoE ELF MBOOT PXE bzImage Menu PXEXT iPXE> ifopen iPXE> chain http://b800.org http://b800.org... ok http://b800.org/... ok new id b800.org/38aqU iPXE> set b800public 1 && chain http://b800.org http://b800.org... ok http://b800.org/... ok new id b800.org/2AxDg iPXE> set b800public 1 && chain http://b800.org http://b800.org... ok http://b800.org/... ok new id b800.org/4YidA iPXE> set b800public 1 && chain http://b800.org http://b800.org... ok