Trident 9000C MKII VGA User manual

Figure 1. 256K DRAM
512KOFIAM
Figure 2. 512K DRAM UPGRADE
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Operating
Instructions
The information contained in this document is believed to be accurate and
reliable. However, the right is reserved to make corections or changes to this
manual at any time and without notice.

9000C MKII Jumper Setting Diagram
J1: 256K1512K DRAM Select
Jl allows you to select the memory configuration in your VGA adapter
for 256K or 512K memory configuration.
When 256K memory (2 DRAM)
is installed in the VGA adapter, Jumper
Jl needs to be in the closed postion. When 512K memory (4 DRAM) is
installed in the VGA adapter, Jumper
Jl needs 10 be in the open postion.
Figure 2 illustrates the two setting for Jumper JI.
J2: Select Scan Rate
J2 allows you to configure the scan rates of extended VGA modes to be
compatible with your multi-scanning monitor.
J2 is operational for 4
DRAM (SI2K) configurations only. If your monitor can scan at48.7
KHz, remove theJumperpinacross J2. J2 in the openposition will allow
non-interlaced display for lO24x768 modes and higher horizontal and
vertical scan rates for 800x600-16 color (4 DRAM). If your monitor
cannot scan
at 48.7KHz, leave the Jumper pin for J2 in the default
1
position. This will give interlaced display for lO24x768 modes and
reduced horiwntal and vertical scan rates for the 800x600-16 color.
J3: EnablelDisable Autodetect
J3 allows you 10 enable/disable the BIOS Autodetect feature. When
enabled (
open) the B[OS will determine whether the Graphics Adapter
can operate with an 8-bitor 16-bitB[OS interface, and will configure the
BIOS interfaceaccordingly. When disabled ( close ), the hoard will boot
up in its default BIOS interface setting (generally 8-bit).
J4, J5, J6: 8 or 16 Bit AT-Bus Slot Select
Jumper Setting for 16-bit slot:
J4 J5
Jumper Setting for 8-bit slot:
J4 J5
2
J6
~
~
J6
DRAM Upgrades
The VGA adapter can be configured with two or four pieces of 256Kx4
(80 nanosecond) Fast Page Mode DRAM.
Upgrading from two to four DRAM allows you to display up to
I024x768-16 colors. [talso speeds up the performance. Order 256Kx4
Fast Page Mode DRAM (sometimes called one megabit DRAM).
DRAM speed should be 80 nanoseconds.
Upgrading From 256KDRAM to 512K
I. Tum off machine before starting DRAM upgrade.
2. Place the adapter component side up on a firm, !lat, non-static
surface (avoid wool materials).
The gold edge connectorshould be
facing you.
3. Insertthe DRAM (two pieces for upgrading
10 512K) into thesockets
provided on the upper left-hand comer
of the board. DRAM should
be added
in columns according 10 the diagrams on the next page
(Figure I). The notched side
of the DRAM should be facing down.
Becareful nollobend thepins.
Besure eachDRAM isseatedsnugty.
' ~ .-'~
4. Insert a jumper block on Juili",er JI. (See Figure 2)
5. Tocheckthatthe DRAM has been installed properly, placetheboard
in your system and tum the system ON. Acopyrightand theamount
of video DRAM detected will appear in the upper left-hand comer
of the initial boot screen. If the amount of DRAM detected is the
same as the amountinstalled (512K), you have installed the DRAM
successfully. Ifthe amount
of DRAM detected is 256K, remove the
adapter from your system. Check to see that all pins lit snugly into
their respective socket holes (i.e., no pins bent underneath the
DRAM chip
or sticking out). Be sure the notches for each DRAM
are facing the same way.
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