Specifications

Introduction
FEATURES OF THE ZT 8809A
• STD-80 and STD 32 bus compatible
• Optional CMOS versions available
• 8088/8086 code compatible
• Four 32-pin memory sockets, configurable for
– 1 EPROM and 3 RAMs or
– 2 EPROMs and 2 RAMs
• Acceptable RAM sizes are 32 Kbytes to 512 Kbytes
• Acceptable EPROM sizes 16 Kbytes through 256 Kbytes
• One 32 Kbyte static RAM
• Real-time clock (DS 1215)
• Optional battery backup for all RAM and real-time clock
• AC/DC power-fail protection
• Latching frontplane connectors
• Optional Numeric Data Processor (8087) via zSBC 337
• Wait-state generator
• Interrupt Controller (8259A-2)
• Two RS-232-C serial channels (VL 16C452), one RS-422/485
selectable
• Three Counter/Timers (8254)
• Centronics printer interface or general purpose parallel I/O port
(VL 16C452)
• Optional STD DOS operating system software
• Optional STD ROM development/debug software
• Optional cables for Centronics printer interface and serial ports
• Fully tested while cycling temperature from ambient to +55˚
Celsius to guarantee reliability (to +80˚ Celsius for
ZT 88CT08A/88CT09A)
• Slow-down and sleep modes provided with the
ZT 88CT08A/88CT09A
• Two-year warranty on all boards
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