ISO Pascal reference manual

Array
Using Pascal with other languages
Arrays are implemented in the obvious simple fashion, as contiguous linear
sequences of elements, each of which will be aligned as the element type
requires. It should be noted that, as for records, use of the keyword
PACKED has no effect on the storage layout adopted for arrays.
Multi-dimensional arrays are stored in order such that the elements of an
array accessed by the two sets of subscripts [i 1,i2..ij] and [i 1,i2..ij + 1] are
stored in adjacent memory locations. This is a consequence of the definition
of multi-dimensional arrays in Pascal, i.e. ARRAY [T1; T2] OF T3 is
defined to be the same as ARRAY [T1] OF ARRAY [T2] OF T3;
Note
32-bit single precision reals are not used in Pascal, and so there is no simple
way to interface to a procecdure with parameter(s) or result(s) which are
32-bit reals, unless such objects are not to be interpreted or modified by the
Pascal code. In this case it is possible to treat the object simply as an
integer, for purposes of assignment and parameter passing. However by
using the facilities of extended Pascal to incorporate machine code in a
program, such an object may be converted into a standard Pascal Real
variable, and vice versa. This process is illustrated below:
TYPE
Real32 = Integer; {NB Cannot manipulate Real32's directly)
FUNCTION RealOfReal32 (r: Real32): Real;
VAR
res: Real;
BEGIN
*MOVFL_r,res; (MOVe Floating (32-bit) to Long (64-bit))
RealOfReal32 := res
END;
FUNCTION Real32OfReal (r: Real): Real32;
VAR
res: Real32;
BEGIN
[ NB the instruction below will fail (i.e. generate an I
I exception) if r is too large to be represented as I
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