BASIC PROGRAMMING SECTION 4.9
4.9.5.3 HELP Text Display
The software which controls HELP will scroll forward through the
lines of Basic text, or pseudo-Basic text, until the verb found
is not a REM. Scrolling backwards is also allowed until a line
is found without a REM. In each case, further scrolling is not
allowed.
4.9.5.4 Storing the Current Display
The contents and cursor position of the screen are not lost
while in HELP mode. On exit from HELP mode, the screen and
cursor are restored to their states prior to HELP mode entry.
4.9.5.5 HUNTER Action during.HELP
When a program is interrupted for HELP display all normal action
is suspended. Serial data reception will continue up to the
capacity of the receive buffer. If handshaking is enabled then
it will continue in a transparent fashion.
Programs will continue after the HELP key is pressed again.
HELP will be entered during any scan of the keyboard, whether
for status or waiting for an actual key depression.
4,9.5.6 Graphics Mode
VER.V09F'
Because HUNTER's graphics screen cannot be re-created from RAM
memory, HELP text would destroy the contents of the screen if
allowed during graphics mode. For this reason, HELP is
inhibited in graphics mode and help key depressions are ignored.
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