Disk Basic Features; Booting Disk Basic - Epson TF-20 Reference Manual

4.1 Disk BASIC Features

All of the commands, statements and functions of ROM BASIC are still
available for use in Disk BASIC. In addition. Disk BASIC adds the following
features
(1) I/O to disks
The device names for the first TF-20 connected are "A:" and "B'", and
those for a second TF-20, if connected, are "C." and "D.". These device
names can be used for any of the ROM version commands and
statements related to I/O. The only exception is the LOAD? command.
(2) Protect SAVE
When the P option is specified in a SAVE statement, the program saved
will be protected from listing and saving
(3) Features added to ROM BASIC
Commands and Statements
*DSKO$
FIELD
*FILNUM
*FRMAT
GET
KILL
LSET, RSET
NAME
PUT
*RESET
*SYSGEN
WHILE.. .WEND
*Features unique to HX-20 Disk
Functions
CVI, CVD. CVS
*DSKF
*DSKI$
LOC
LOF
MKI$. MKD$. MKS$
4-2
4.2 Booting D I S K BASIC
(1) Hardware checklist
Before attempting to boot Disk BASIC, make sure that the following
hardware conditions have been established.
• DIP switch 4 of the HX-20 is ON
• Daisy chain cable #707 is correctly connected to the TF-20 and the
HX-20
• Power is applied to all peripheral equipment before the power of the
HX-20 is turned ON
After making all of the above checks, carefully set the system disk in drive
A When you do so, the indicator lamp on the TF-20 will turn on and off and
DOS will be loaded into the RAM of the TF-20 Next, start up BASIC in the
HX-20 The indicator lamp on the disk drive will again turn on and off and
Disk BASIC will be booted in the HX-20 When Disk BASIC has been
successfully booted, the display of the HX-20 will look like this.
DISK BASIC V-1.0
C o p y r i g h t 1982 by
Microsoft & EPSON
P1: 0 Bytes