Texas Microsystems, Inc. 2003 - Accessing Modules in the 2003 Computer; Accessing Modules in the 2004 Computer; Expansion Slot Con£Iguration

2.3.2 Accessing Circuit Cards in the 2003 Computer
1. Power-down the computer.
2. Remove the 4 screws on each side o£ the top cover.
Remove the top cover and place the screws and the
cover in a convenient place.
3. Unscrew and remove the hold-down clamp that £its
across the circuit boards.
4. To install circuit cards, re£er to the speci£ic
instructions £or the card to be installed (see
Section 4). In addit~on, read any installation
instructions that come with the option purchased.
2.3.3 Accessing Circuit Cards in the 2004 Computer
1. Power-down the Computer.
2. Open the outer door.
3. Unscrew the two thumb screws at the top o£ the
inside chassis.
4. Insure adequate service loop is available £or all
cables and then swing out (down) the inner
chassis.
5. Unscrew and remove the hold-down clamp that £its
across the circuit cards.
6. To install circuit cards, re£er to the speci£ic
inatructions £or the card to be installed (see
Section 4). In addition, read any installation
instructions that come with the option purchased.
2.3.4 Expansion Slot Con£iguration
The 2000 Series AT computer has £ive 8-bit and £ive 16-
bit expansion slots. Viewing the back o£ the computer,
£rom right to le£t, expansion slots 1, 2, 3, 9, and 10
are the 8-bits and slots 4, 5, 6, 7, and 8 are 16-bits.
Each 8-bit slot has one 62-pin connector providing 8
data bits and 20 address lines. This con£iguration is
equivalent to an address space o£ 1M byte that is 8
bits wide.
Each 16-bit slot has two connectors. A 62-pin connec-
tor contains the lower 8 data bits and lower 20 address
lines. A 36-pin connector contains the upper 8 data
bits and upper 4 address lines. The combined bus con-
Preliminary AT Users Manual
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11/26/86