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BLOAD Statement Details
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BLOAD loads a memory-image file created by BSAVE into memory from an
input file or device.
BLOAD filespec$[,offset%]
■ The argument filespec$ is a string expression that specifies the
file or device from which to load a memory-image file.
Usage Notes
■ The BLOAD statement allows a program or data saved as a memory-image
file to be loaded anywhere in memory. A memory-image file is a
byte-for-byte copy of what was originally in memory.
■ The starting address for loading is determined by the specified
offset and the most recent DEF SEG statement. If offset% is omitted,
the segment address and offset contained in the file (the address
used in the BSAVE statement) are used. Thus, the file is loaded at
the address used when saving the file.
■ If you supply an offset, the segment address used is the segment
set by the most recently executed DEF SEG statement. If there has
been no DEF SEG statement, the BASIC data segment (DGROUP) is used as
the default.
■ If the offset is a long integer, or a single-precision or
double-precision number, it is coerced to an integer. If the offset
is a negative number between -1 and -32,768, inclusive, it is treated
as an unsigned 2-byte offset.
BLOAD and Expanded Memory Arrays
■ Do not use BLOAD to load a file into an expanded memory array. (If
you start QBX with the /Ea switch, any of these arrays may be stored
in expanded memory:
- Numeric arrays < 16K in size
- Fixed-length string arrays < 16K in size
- User-defined-type arrays < 16K in size
■ If you want to use BLOAD to load a file into an array, first start
QBX without the /Ea switch. (Without the /Ea switch, no arrays are
stored in expanded memory.)
■ For more information on using expanded memory, see
◄Using Expanded Memory►.
Important
■ Programs written in earlier versions of BASIC no longer work
if they use VARPTR to access numeric arrays.
■ Because BLOAD does not perform an address-range check, it is
possible to load a file anywhere in memory. You must be careful
not to write over BASIC or the operating system.
■ Because different screen modes use memory differently, do not load
graphic images in a screen mode other than the one used when they
were created.
■ Because BASIC program code and data items are not stored in the same
locations as they were in BASICA, do not use BLOAD with files created
by BASICA programs.
Differences from BASICA
■ BLOAD does not support the cassette device.