Technical information

vii
Figures and Tables
Chapter 1
Introduction
1
Figure 1-1 The DOS Compatibility Card assembly 2
Figure 1-2 The DOS Compatibility Card installed 4
Figure 1-3 Simplified block diagram of the DOS Compatibility Card 5
Figure 1-4 Monitor adapter cable 8
Figure 1-5 Monitor adapter cable and game controller installed 9
Table 1-1 Comparison of the DOS Compatibility Card and a
midrange PC 3
Table 1-2 Corresponding serial-port signals 6
Chapter 2
Hardware Design
11
Figure 2-1 Detailed block diagram 13
Figure 2-2 Video timing parameters 25
Table 2-1 Transfer size comparison 16
Table 2-2 Definitions of PC interrupts 17
Table 2-3 Arbitration priorities 18
Table 2-4 Monitors and display modes 23
Table 2-5 VIdeo timing parameters for supported monitors 24
Chapter 3
The PC Interface Driver
33
Table 3-1 Bits in the PC status word 40
Thi d t t d ith F M k 4 0 4