Specifications

CPU Description
Each unit contains several registers important to the programmer. In
the following description of these registers, the designator in brackets
is the name of that register used by those who are familiar with the
8088 series of microprocessors. If no bracketed name is shown, no
8088 equivalent exists for this V20 register.
Segment
Registers
The V20 can directly address up to one megabyte of memory in
segments of 64 Kbytes or less. The starting address of a segment is
specified in a segment register. The four segment registers are as
follows:
PS [CS] - Program Segment Register
SS [SS] - Stack Segment Register
DS0 [DS] - Data Segment Register 0
DS1 [ES] - Data Segment Register 1
Note: Register name in brackets is the 8088 series microprocessor designator.
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