Denso BHT-BASIC 100 SERIES, Руководство программиста, Страница: 135 / 577

Chapter 8. Files
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8.2 Data Files
8.2.1 Overview
Like user programs, data files will be stored in the user area of the memory. The location of the
user area differs depending upon the BHT series as shown below.
* Drive B is provided for ensuring the compatibility with conventional BHT series.
The memory space available for data files is (Memory space on drive A - Memory space occu-
pied by user programs).
For the memory mapping, refer to Appendix F, "Memory Area." You may check the current
occupation of the memory with the
FRE
function.
8.2.2 Naming Files
The name of a data file generally contains filename . extension . The filename can
have one to eight characters; the extension can have one to three characters.
The filename . extension may be preceded by the drivename . The drivename is
A: or B:. If the drivename is omitted, the default A: applies.
The extension can be omitted. In such a case, a period should be also omitted. The fol-
lowing extensions cannot be used for data files:
Unavailable extensions for data files . PD3 , . FN3 , . EX3 , and . FLD
Programs make no distinction between uppercase and lowercase letters for drive names, file
names, and extensions. They regard those letters as uppercase.
BHT series Location of user area
BHT-100 Drive A and drive B*