.
(specifically, HP's Pavilion P6-2310)
Excerpted from http://distrowatch.com/weekly.php?issue=20121126#news
Boot machine while pressing F10
Find Secure Boot in the menu tree, ignore warnings
Disable Secure Boot feature
Enable legacy boot options
Enable specific legacy devices, such as USB devices
Save and reboot while holding down F9
If this doesn't work for your device, refer to Jesse Smith's article for clues.
Also, post your solution if some other scheme works for you.
Vintage DEC/CLEARPOINT INC. -QRAM-2 SAB-1 1MB Q-BUS MEMORY MSV11-QA (B2)
$129.99
DEC VINTAGE DIGITAL EQUIPMENT CORPORATION VT100 TERMINAL & KEYBOARD AS-IS
$198.99
DEC PDP 8/M PDP 8M / 4 avail / Vintage Digital Equipment Corp /Also DEC PDP 12
$5775.00
DEC DIGITAL Equipment Corp VT220-D2 Vintage CRT Terminal
$215.00
Vintage DEC Digital RX 180 AB Dual 5.25" Disk Drive
$149.00
Vintage Digital DEC dfo1 Acoustic Coupler modem Anderson Jacobsen Mod# A242 RARE
$189.95
Vintage DEC / DIGITAL CLEARPOINT INC COMPUTER BOARD QRAM-11 QBUS Memory PQ
$109.00
$39.00
Vintage DEC/The Redac mini cabinet front panel Digital Equipment Corp. 19"
$269.99
Vintage DEC DECserver 250 Motorola 68000 print server ST534
$30.00