Processor Board

This board contains the main CPU for the entire system, as well as all logic for control of the disk drive(s). The board can support up to two floppy drives, and indeed some models of Wangwriter came equipped with two floppy drives. This particular model, however, is a single floppy model. The CPU is a Z80 made by MOSTEK. It is accompanied by a Z80 CTC and PIO as well. An Intel P8272 handles communication with the floppy drive(s), and a CDP1854 UART handles communication with the keyboard. The D2716 EPROM on this board is the primary bootstrap ROM that initializes the CRT as well as the floppy drive and then starts looking for executable data on the floppy at address 0x0200.

Schematics

These are the official Wang schematics, provided by the awesome Rich.

All schematics are available here in PDF format.

ROM Backup

D2716 - Bootstrap ROM