Eclipse3 Optional Features Register - Rastergraf Eclipse3 Series User Manual

Rastergraf
Display Memory Size
The pixel size is programmable to 8, 15, 16, or 32 bpp. The SGRAM on
the Borealis is either 16 MB or 32 MB, where a MB = 1024 * 1024 bytes.
Calculate the possible display formats based on these values.
Note that you can render into SGRAM that is not being used in the active
display, and by changing the starting address register in the Borealis pan
to it so it is visible or BitBLT the Pixmap data to a static display window.

3.5 Eclipse3 Optional Features Register

Although most functions on the Eclipse3 are self-contained, it is necessary
to maintain a few extra control bits for supplementary features. Using the
Micrel MIC74 I
auxiliary register.
All bits come up tristate and have pullups except I2CMUX which has a
pull down.
Table 3-2 Eclipse3 ACR Register Bit Assignments
Bit Mnemonic
0 REDLED
1 AMBLED
2 GRNLED
3 I2CMUX
5, 4
6 PBSEL
7
3-12 Programming On-board Devices
2
C 8-bit I/O register, the graphics board supports an
Value Function
0
1
0
1
0
1
1
0 monitor
-- - not used
0 high bank
1 low bank
-- -
on
off
on
off
on
off
local Switches the Borealis DDC2B/I2C
control lines between local devices
(THC63DV164, Serial EEPROM, and
LM75) and the display monitor.
Selects between the high and low 64
KB of Flash PROM when JP101 is not
JP101( installed) overrides this bit
Description
Red LED
Amber LED
Green LED
--
installed.
(forces low).
not used