Trident 9000C MKII VGA Operating Instructions Manual

Figure

1.

256K

DRAM

512KOFIAM

Figure

2.

512K

DRAM

UPGRADE

4

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 the Jumper pin across

J2.

J2

in the open position 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-bit or 16-bit

B[OS interface, and will configure the
BIOS interface accordingly. 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
I 024x768-16 colors. [t also 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 connector should

be

facing you.

3. Insert the DRAM (two pieces for upgrading

10

512K) into the sockets

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.

Be careful nollo bend the pins.

Besure

each DRAM is seated snugty.

'~.-'~

4. Insert a jumper block on Juili",er

JI.

(See Figure 2)

5. To check

that the DRAM has been installed properly, place the board

in

your system and tum the system ON. A copyright and the amount

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 amount installed (512K), you have installed the DRAM
successfully. If the 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.

3