Boot Rom Circuit; Graphics Circuit - HP 743 Series Technical Reference Manual For Oems

General Information
Model 743 and Model 744 VME Board Computers

Boot ROM Circuit

The Boot ROM circuits have Boot ROMs containing 2x526 Kilobytes (Model 744) or 512
Kilobytes (Model 743) of information that does the following:
• Manages the internal interface configurations
• Searches for and boots an operating system
• Self-tests the board computer's main circuits
• Starts the CPU functions
An EEPROM stores the following information:
• Internal interface configurations
• LAN ID number
• System board serial number
NOTE: The workstation's LAN ID number's last 6 characters are labeled on the EEPROM. The first
group of six digits are typically "080009" or "0060b0" (the HP-owned prefix).
A PLL Clock Module generates the system clock, on which all timing is based.

Graphics Circuit

System boards with on-board graphics or graphics cards have a graphics controller ASIC and
the display RAM. Resolution and refresh rate can be configured using the boot console han-
dler for several types of monitors.
A keyboard must be connected to the PS/2 0 port if graphics are used as part of the console
path. When a graphics device is specified as the console path, the boot ROM first checks for
a keyboard by using the keyboard search list. If a keyboard is not found in this search list,
graphics are not enabled.
Table 1-9 summarizes the graphics performance figures for the Model 743 with HP-UX and
Table 1-9 summarizes the graphics performance figures for the Model 744 with HP-UX.
Table 1-9 Model 743 Graphics Performance
2D/3D vectors/sec
Lighted, shaded quadrilateral/sec
PLBsurf
Triangles/sec
X11 Vec/sec
Xmark93
1-16
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Model 743 i/64
HCRX 8
8 Plane 8 Plane
and 24
1.4M 1.5M 1.6M
15K 14K 23K
19 21
26K 25K 40K
1.2M 1.5M 1.2M
8.1 9.3
Model 743 i/100
HCRX 8
and 24
2.3M
23K
23 32
40K
2.1M
8.6 12.1