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SEMI P39-0304 E2 © SEMI 2004 7 Table 5 Delta Examples Bit Pattern Type Meaning 11111001 00100011 1-delta  = -2300 11111000 00100011 1-delta  = +2300 10011000 00101010 2-delta  x = +1350 10011011 00101010 2-delta …

SEMI P39-0304

7.4.2 The set of printable ASCII characters consists of hexadecimal character codes 21-7E. In ascending order of

character code, we have:

!"#$%&’()*+,-./0123456789:;<=>?@ [21-40]

ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_‘ [41-60]

abcdefghijklmnopqrstuvwxyz{|}~ [61-7E]

This excludes space (SP), tabs (HT, VT), and all other control characters.

7.4.3 EXCEPTION HANDLING

— OASIS processors should treat illegal characters in a-strings or n-strings as

fatal errors. Zero-length n-strings should also be treated as fatal errors.

7.5 Deltas

7.5.1 A delta represents geometric data (coordinates, vectors, planar offsets, etc.).

7.5.2 A 1-delta is stored as a signed-integer and represents a horizontal or vertical displacement. Bit 0 encodes

direction: 0 for east or north, 1 for west or south. The remaining bits are the magnitude. Horizontal or vertical

alignment is implied by context.

7.5.3 A 2-delta is stored as an unsigned-integer and represents a horizontal or vertical displacement. Bits 0-1

encode direction: 0 for east, 1 for north, 2 for west, and 3 for south. The remaining bits are the magnitude.

7.5.4 A 3-delta is stored as an unsigned-integer and represents a horizontal, vertical, or 45-degree diagonal

displacement. Bits 0-2 encode direction: 0 for east, 1 for north, 2 for west, 3 for south, 4 for northeast, 5 for

northwest, 6 for southwest, and 7 for southeast. The remaining bits are the magnitude (for horizontal and vertical

deltas) or the magnitude of the projection onto the x- or y-axis (for 45-degree deltas).

7.5.5 A g-delta has two alternative forms and is stored either as a single unsigned-integer or as a pair of unsigned-

integers. The first form is indicated when bit 0 is zero, and represents a horizontal, vertical, or 45-degree diagonal

displacement, with bits 1-3 encoding direction, and the remaining bits storing the magnitude, in the same fashion as

a 3-delta. The second form represents a general (x,y) displacement and is a pair of unsigned-integers. Bit 0 of the

first integer is 1. Bit 1 of the first integer is the x-direction (0 for east, 1 for west). The remaining bits of the first

integer represent the magnitude in the x-direction. Bit 0 of the second integer is the y-direction (0 for north, 1 for

south). The remaining bits of the second integer represent the magnitude in the y-direction. Both forms may appear

in a list of g-deltas.

Figure 4

Delta Types

SEMI P39-0304

Table 5 Delta Examples

Bit Pattern Type Meaning

11111001 00100011 1-delta

 = -2300

11111000 00100011 1-delta

 = +2300

10011000 00101010 2-delta

x = +1350

10011011 00101010 2-delta

y = -1350

11001101 00000001 3-delta

x = -25, y = +25

11010111 00000111 3-delta

x = +122, y = -122

11101001 00000011 01111010 g-delta

x = +122, y = +61

11101100 00000101 g-delta

x = -46, y = -46

10111011 00000001 10110111 00001111 g-delta

x = -46, y = -987

7.6 Repetitions

7.6.1 A repetition represents an “array” of cell placements, geometries, or text elements. The repetition is part of

the PLACEMENT, <geometry>, or TEXT record itself. A repetition consists of an unsigned-integer which

encodes the type, followed by any related repetition parameters:

Table 6 Repetition Types

TYPE

Format

re-use the previous repetition definition

1 x-dimension y-dimension x-space y-space

2 x-dimension x-space

3 y-dimension y-space

x-dimension x-space

... x-space

N-1

x-dimension grid x-space

... x-space

N-1

y-dimension y-space

... y-space

M-1

y-dimension grid y-space

... y-space

M-1

8 n-dimension m-dimension n-displacement m-displacement

9 dimension displacement

dimension displacement

... displacement

P-1

dimension grid displacement

... displacement

P-1

7.6.1.1 x-dimension, y-dimension, x-space, y-space, dimension, n-dimension, m-dimension, and grid are all

unsigned-integers. displacement, n-displacement, and m-displacement are g-deltas.

7.6.2 TYPE 0 indicates that the previous repetition description, stored in modal variable repetition, is to be re-used.

(See Section 10 on page 11.) No additional values are stored with this type.

7.6.3 TYPE 1 is an N-column (N > 1) by M-row (M > 1) matrix with uniform horizontal and vertical spacing

between the elements. x-dimension is N - 2 and y-dimension is M - 2. The (x-offset, y-offset) (cumulative spacing

in the (horizontal,vertical) direction) of element (i,j) of the repetition (i = 0, ..., N-1 and j = 0, ..., M-1) is

(i * x-space, j * y-space).

7.6.4 TYPE 2 is an N-column (N > 1) by 1-row vector with uniform horizontal spacing between the elements. x-

dimension is N - 2. The (x-offset, y-offset) (cumulative spacing in the (horizontal,vertical) direction) of element i of

the repetition (i = 0, ..., N-1) is (i * x-space, 0).

7.6.5 TYPE 3 is a 1-column by M-row (M > 1) vector with uniform vertical spacing between the elements. y-

dimension is M - 2. The (x-offset, y-offset) (cumulative spacing in the (horizontal,vertical) direction) of element j of

the repetition (j = 0, ..., M-1) is (0, j * y-space).

SEMI P39-0304

7.6.6 TYPE 4 is an N-column (N > 1) by 1-row vector with (potentially) non-uniform horizontal spacing between

the elements. x-dimension is N - 2. The (x-offset, y-offset) (cumulative spacing in the (horizontal,vertical) direction)

of element i of the repetition (i = 0, ..., N-1) is (x-space

+ ... + x-space

, 0), with x-space

= 0.

7.6.7 TYPE 5 is identical to TYPE 4, except that all offset values must be multiplied by grid during expansion of

the repetition.

7.6.8 TYPE 6 is a 1-column by M-row (M > 1) vector with (potentially) non-uniform vertical spacing between the

elements. y-dimension is M - 2. The (x-offset, y-offset) (cumulative spacing in the (horizontal,vertical) direction) of

element j of the repetition (j = 0, ..., M-1) is (0, y-space

+ ... + y-space

), with y-space

= 0.

7.6.9 TYPE 7 is identical to TYPE 6, except that all offset values must be multiplied by grid during expansion of

the repetition.

7.6.10 TYPE 8 is an N (N > 1) by M (M > 1) repetition with uniform and (potentially) diagonal displacements

between the elements. n-dimension is N - 2 and m-dimension is M - 2. Defining n-displacement in terms of its

components nx-space and ny-space (and similarly for m-displacement), the (x-offset, y-offset) (cumulative spacing

in the (horizontal,vertical) direction) of element (i,j) of the repetition (i = 0, ..., N-1 and j = 0, ..., M-1) is

(i * nx-space + j * mx-space, i * ny-space + j * my-space).

7.6.11 TYPE 9 is a P-element (P > 1) repetition with uniform and (potentially) diagonal displacements between the

elements. dimension is P - 2. Defining displacement in terms of its components x-space and y-space, the (x-offset,

y-offset) (cumulative spacing in the (horizontal,vertical) direction) of element k of the repetition (k = 0, ..., P-1) is

(k * x-space, k * y-space).

7.6.12 TYPE 10 is a P-element (P > 1) repetition with (potentially) non-uniform and arbitrary two-dimensional

displacements between the elements. dimension is P - 2. Defining displacement

in terms of its components x-

space

and y-space

, the (x-offset, y-offset) (cumulative spacing in the (horizontal,vertical) direction) of element k

of the repetition (k = 0, ..., P-1) is (x-space

+ ... + x-space

, y-space

+ ... + y-space

) with x-space

= y-space

0).

7.6.13 TYPE 11 is identical to TYPE 10, except that all offset values must be multiplied by grid during expansion

of the repetition.