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Table 14: Example of an ASCII Table

The letter A has a value of 65 decimal or 41 hex

The letter a has a value of 97 decimal or 61 hex

The number 0 has a value of 48 decimal or 30 hex

The number 9 has a value of 57 decimal or 39 hex

This gives rise to the possibility of confusion when parameters are being set on the display. For example,

some commands use a [type] parameter to indicate a ﬁle type. We’re told that acceptable values are 0 and

5. All parameters must use numeric values (i.e., the actual byte values). If we send the ASCII number 0 by

mistake it will actually give the value 48 decimal (30 hex) to the parameter, which is wrong. In the tables

given in the following sections ASCII characters are shown as ’A’, with single quotes.

7.4 Text Commands

Syntax in the tables below is given in hex, decimal and decimal with ASCII, in that order, one per line.

Table 15: Text Commands

Command Syntax Default Notes

Auto scroll on FE 51

254 81

254 ’Q’

off Enables scroll at

bottom of screen.

Text will push

display up one

line to make room

for new line.

Auto scroll off FE 52

254 82

254 ’R’

off Disables auto

scroll. Text will

wrap to top left

and overwrite

existing text.

Set text insertion point FE 47 [col] [row] 254 71

[col] [row]

254 ’G’ [col] [row]

n/a Sets text insertion

point using the

base size of the

current font.

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