Appendix B

Equity II+ Specifications

CPU and Memory

16-bit

CPU

80286 microprocessor; 8 or 12 MHz clock-

 

 

rate,

switch-selectable

 

 

Real address (8086-compatible) and pro-

 

 

tected virtual address (multi-tasking or multi-

 

 

user)

modes

 

 

24-bit address and 16-bit data bus

Main memory

640KB RAM on memory card; expandable

 

 

to 15.5MB maximum with expansion cards

R O M

 

32KB, expandable to 64KB, selectable

 

 

alternate ROM for custom use

Math

coprocessor

80287 (8 MHz) support (optional)

Controllers

Floppy disk

Supports up to two drives available in any of

 

four formats: double - density (360KB),

 

double - density (720KB), high - density

 

(1.2MB), or high-density (1.44MB); control-

 

ler on multifunction card

Hard disk

Supports up to two drives available in

 

multiple formats (including 10MB, 20MB,

 

30MB, and 40MB); installs in option slot

Interfaces

Serial

RS-232C , programmable, asynchronous,

 

DB-9P male connector

Printer

Standard 8-bit parallel, DB-25S female

 

connector

User'sGuide

B - l