Specifications

vii
Figures and Tables
Chapter 1
Introduction
1
Figure 1-1 Front view of the Macintosh LC 520 computer 4
Figure 1-2 Back view of the Macintosh LC 520 computer 5
Figure 1-3 Screen control panel 7
Figure 1-4 RAM configurations 8
Figure 1-5 RAM expansion SIMM 9
Figure 1-6 Serial port sockets 14
Table 1-1 VRAM size and number of colors 6
Table 1-2 Pin assignments for the internal and external
SCSI connectors 11
Table 1-3 Pin assignments for the internal floppy disk connector 13
Table 1-4 Serial port signals 14
Table 1-5 ADB connector pin assignments 15
Table 1-6 Reset and NMI key combinations 17
Chapter 2
Architecture
19
Figure 2-1 Block diagram 21
Figure 2-2 24-bit and 32-bit address maps 24
Figure 2-3 Standard video timing 26
Figure 2-4 Video timing for the Apple IIe card 28
Table 2-1 Video parameters for the standard display 25
Table 2-2 Video parameters for the Apple IIe display 27
Chapter 3
Expansion
29
Figure 3-1 Generating the card select signal 35
Table 3-1 Signals on the 96-pin section of the expansion connector 31
Table 3-2 Signals on the 18-pin section of the expansion connector 32
Table 3-3 Processor-direct expansion connector signal descriptions 32
Table 3-4 Expansion slot signals not connected to the MC68030 33
Table 3-5 Power available for the expansion card 36
Chapter 4
Software 37
Figure 4-1 Sound control panel 41
Figure 4-2 Sound options 41
Figure 4-3 Screen control panel 42