Cpu Board

The processor hardware can be broken down into five basic functional blocks as shown in Figure 6-1. The arrows indicate the possible data flow directions between the various blocks. The ALU and Control block are the main components of the processor while the Memory and I O blocks may be thought of as merely peripherals. Figure 6-2 is a detailed block diagram of the processor. The numbers in each block correspond to the entries in Table 6-1, which lists the IC numbers of the main components of...

Chirping Birds

The Chirping Birds sound is activated whenever a beetle is knocked out. This circuit consists of two major sections a random noise generator circuit and the chirping birds sound circuit. The random noise generator consists of a divide-by 64 circuit (01), which is two cascaded 4-bit binary counters. Pin 10 is a square wave which toggles every 32 clock pulses appearing at Pin 12. This output feeds into the digital noise generator. The digital noise generator section is comprised of one serial...