Display Driver Part 3

It is counter intuitive to the author to print a string from right to left.   With the origin of the co-ordinates in the lower right hand part of the screen, the pixels of each character would need to be output from right to left. It seems like flipping the X axis will be worthwhile task.  Unfortunately there is no command to support this.(1)

Because areas are filled by row and not by columns, the font to hex map contained in part 1 is not ideal.  The map will need to be redone in relation to rows instead of columns.  Taking the example from part 1, the letter A.

11111  -> 0x1F

10001  -> 0x11

11111  -> 0x1F

10001  -> 0x11

10001  -> 0x11

Since the pixels draw from the bottom up this would be stored in memory as {0x11, 0x11, 0x1F, 0x11, 0x1F}. MSB is on the left LSB on the right.  

New hex map


// starts with the ASCI value 32
// all characters used the bored font except for " # % ( ) * + , - / 1 7 : ; = I [ \ ] ^ _ `

{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x10, 0x10, 0x10, // ' ' !
0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x1f, 0x0a, 0x1f, 0x0a, // " #
0x02, 0x07, 0x07, 0x07, 0x02, 0x10, 0x0a, 0x04, 0x0a, 0x01, // $ %
0x1e, 0x13, 0x1e, 0x12, 0x1e, 0x00, 0x00, 0x00, 0x08, 0x08, // & '
0x02, 0x04, 0x04, 0x04, 0x02, 0x08, 0x04, 0x04, 0x04, 0x08, // ( )
0x00, 0x0a, 0x04, 0x0a, 0x04, 0x00, 0x04, 0x0e, 0x04, 0x00, // * +
0x10, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0x00, 0x00, // , -
0x10, 0x00, 0x00, 0x00, 0x00, 0x10, 0x08, 0x04, 0x02, 0x01, // . /
0x1f, 0x11, 0x11, 0x11, 0x1f, 0x0a, 0x04, 0x04, 0x04, 0x0c, // 0 1
0x1f, 0x10, 0x1f, 0x01, 0x1e, 0x1f, 0x01, 0x0f, 0x01, 0x1f, // 2 3
0x02, 0x1f, 0x0a, 0x06, 0x02, 0x1e, 0x01, 0x1f, 0x10, 0x1f, // 4 5
0x1f, 0x11, 0x1f, 0x10, 0x0f, 0x08, 0x04, 0x02, 0x01, 0x1f, // 6 7
0x1f, 0x11, 0x1f, 0x11, 0x1f, 0x1f, 0x01, 0x1f, 0x11, 0x1f, // 8 9
0x00, 0x08, 0x00, 0x08, 0x00, 0x08, 0x08, 0x00, 0x08, 0x00, // : ;
0x00, 0x04, 0x08, 0x04, 0x00, 0x00, 0x0e, 0x00, 0x0e, 0x00, // < =
0x00, 0x04, 0x02, 0x04, 0x00, 0x04, 0x00, 0x06, 0x02, 0x0e, // > ?
0x1e, 0x1c, 0x1e, 0x1e, 0x00, 0x11, 0x11, 0x1f, 0x11, 0x1f, // @ A
0x1f, 0x11, 0x1e, 0x11, 0x1f, 0x1f, 0x11, 0x10, 0x11, 0x1f, // B C
0x1e, 0x11, 0x11, 0x11, 0x1e, 0x1f, 0x10, 0x1e, 0x10, 0x1f, // D E
0x10, 0x10, 0x1e, 0x10, 0x1f, 0x1f, 0x11, 0x13, 0x10, 0x1f, // F G
0x11, 0x11, 0x1f, 0x11, 0x11, 0x0e, 0x04, 0x04, 0x04, 0x0e, // H I
0x1f, 0x11, 0x01, 0x01, 0x01, 0x11, 0x12, 0x1c, 0x12, 0x11, // J K
0x1f, 0x10, 0x10, 0x10, 0x10, 0x15, 0x15, 0x15, 0x15, 0x1b, // L M
0x11, 0x13, 0x15, 0x19, 0x11, 0x1f, 0x11, 0x11, 0x11, 0x1f, // N O
0x10, 0x10, 0x1f, 0x11, 0x1f, 0x1f, 0x13, 0x11, 0x11, 0x1f, // P Q
0x11, 0x12, 0x1f, 0x11, 0x1f, 0x1f, 0x01, 0x1f, 0x10, 0x1f, // R S
0x04, 0x04, 0x04, 0x04, 0x1f, 0x1f, 0x11, 0x11, 0x11, 0x11, // T U
0x04, 0x0a, 0x11, 0x11, 0x11, 0x1b, 0x15, 0x15, 0x15, 0x15, // V W
0x11, 0x0a, 0x04, 0x0a, 0x11, 0x1f, 0x01, 0x1f, 0x11, 0x11, // X Y
0x1f, 0x08, 0x04, 0x02, 0x1f, 0x06, 0x04, 0x04, 0x04, 0x06, // Z [
0x01, 0x02, 0x04, 0x08, 0x10, 0x0c, 0x04, 0x04, 0x04, 0x0c, // \ ]
0x00, 0x00, 0x00, 0x0c, 0x04, 0x1f, 0x00, 0x00, 0x00, 0x00, // ^ _
0x00, 0x00, 0x00, 0x08, 0x10, 0x11, 0x11, 0x1f, 0x11, 0x1f, // ` A
0x1f, 0x11, 0x1e, 0x11, 0x1f, 0x1f, 0x11, 0x10, 0x11, 0x1f, // B C
0x1e, 0x11, 0x11, 0x11, 0x1e, 0x1f, 0x10, 0x1e, 0x10, 0x1f, // D E
0x10, 0x10, 0x1e, 0x10, 0x1f, 0x1f, 0x11, 0x13, 0x10, 0x1f, // F G
0x11, 0x11, 0x1f, 0x11, 0x11, 0x0e, 0x04, 0x04, 0x04, 0x0e, // H I
0x1f, 0x11, 0x01, 0x01, 0x01, 0x11, 0x12, 0x1c, 0x12, 0x11, // J K
0x1f, 0x10, 0x10, 0x10, 0x10, 0x15, 0x15, 0x15, 0x15, 0x1b, // L M
0x11, 0x13, 0x15, 0x19, 0x11, 0x1f, 0x11, 0x11, 0x11, 0x1f, // N O
0x10, 0x10, 0x1f, 0x11, 0x1f, 0x1f, 0x13, 0x11, 0x11, 0x1f, // P Q
0x11, 0x12, 0x1f, 0x11, 0x1f, 0x1f, 0x01, 0x1f, 0x10, 0x1f, // R S
0x04, 0x04, 0x04, 0x04, 0x1f, 0x1f, 0x11, 0x11, 0x11, 0x11, // T U
0x04, 0x0a, 0x11, 0x11, 0x11, 0x1b, 0x15, 0x15, 0x15, 0x15, // V W
0x11, 0x0a, 0x04, 0x0a, 0x11, 0x1f, 0x01, 0x1f, 0x11, 0x11, // X Y
0x1f, 0x08, 0x04, 0x02, 0x1f} // Z

Epson Controller (1) pg. 30