Technical Information 1-11
Table Section 1-4 LCD Display Mode (640 x 480 DSTN, Simultaneous CRT
Display)
Mode
(Hex)
Display
Mode
Colors
Text
Display
Resolution
Font
Refesh
Rate
F Planar Mono 80x25 640x350 8x14 60
10 Planar 16 80x25 640x350 8x14 60
11 Planar 2 80x30 640x480 8x16 60
12 Planar 16 80x30 640x480 8x16 60
13 Packed
Pixel
256 40x25 320x200 8x8 60
20 4-bit
linear
16 80x30 640x480 8x16 60
30 8-bit
linear
256 80x30 640x480 8x16 60
78 Packed
Pixel
256 80x25 640x400 8x16 60
79 Packed
Pixel
256 80x30 640x480 8x16 60
*EGA Extension
**VGA Extension
PARALLEL INTERFACE
The system's parallel interface integrates National Semiconductor’s PC87334 chip. It uses a
25-pin D-subconnector. The port is located on the system's rear panel.
The modes of operation available for a PC87334 chip are
compatibility mode
nibble mode
byte mode
Enhanced Capabilitied Port (ECP)
Enhanced Parallel Port (EPP).
The user selects between three parallel interface modes using Auto Setup. These include
unidirectional, bidirectional or enhanced. Unidirectional mode sends data output from the
standard ISA port only. Bidirectional mode sends data using the standard ISA port or PS/2
technology. Enhanced mode enables high speed data transmission to occur using either the
unidirectional or bidirectional modes.
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