UM0144 datasheet(18/92 Pages) STMICROELECTRONICS

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3 ST7 Assembler

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UM0144

You can change the Motorola format representation by using directives (.INTEL, .TEXAS) to

indicate the new setting format. For more information, refer to on page 48.

Caution:

Addresses for SEGMENT definition are always given in hexadecimal:

segment byte at: 100-1FF 'test'

The segment 'test' is defined within the 256-511 address range.

Numeric constants and radix

Constants may need special characters to define the radix of the given number.

The assembler supports the MOTOROLA format by default. INTEL, TEXAS, ZILOG formats

are also available if the format is forced by .INTEL .TEXAS or .ZILOG directives.

Table 3 on

page 18 shows a summary of these formats.

Note:

Decimal constants are always the default, and require no special characters.

String constants

String constants are strings of ASCII characters surrounded by double quotes.

For example:

ASCII character constants

The assembler's arithmetic parser also handles ASCII characters in single quotes, returning

the ASCII of the given character(s).

For example:

Table 3.

Numeric constants and radix formats

Format

Hex

Binary

Octal

Current PC

Motorola

$ABCD or &ABCD

%100

~665

(use MULT for

MULTIPLY)

Intel

0ABCDh

100b

665o

665q

Texas

>ABCD

?100

~665

Zilog

%ABCD

%(2)100

%(8)665

“This is an ASCII string”

‘A’

$41

‘6’

$06

‘AB’

$4142

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