Epson Apex User Manual Page 97

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Appendix B
Specifications
Main Unit
16-bit CPU
Main memory
Coprocessor
8088
microprocessor;
4.77MHz or 8MHz clockrate;
push-button selectable
512KB; expandable to 640KB
8087 microprocessor
(optional)–for use only at
4.77MHZ
8087-2 microprocessor
(optional)–for use only at
8MHZ
Read Only
16KB, selectable by jumper
Memory (ROM)
Interrupt (8259) Programmable interrupt
controller, 8 interrupt levels
Timer/counter Three programmable timer/
(8253-5)
counters
Parallel interface
Standard 8-bit parallel, DB-25
female connector;
programmable; on system
board
Specifications
B-1
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