# My First Assembler Trips

As you might have noticed (harhar) I typed in a lot of programs for the KIM-1 lately. And I got to a point where I can read and understand this programs. Yay.

Now the following problem occured: A prg in 'Best of Micro Vol. II' is Conways Game of Life for the KIM-1 equipped with a video expansion card. And hey, guess what, I do have a KIM-1 clone with a Graphics card. In this Program the vertical and horizontal coordinates are handed over in a hexadecimal number like this ESC=VH(Text) where V and H are positions in hexadecimal.

My PiGFX solution sadly wants a ascii streamed number as input, for example ESC[10,15f means Move to , The numer 10 here is transfered over the serial line as "\$31\$30" (ascii for 1 and 0 ... The numbers start in Ascii at \$30)

But how do I translate a HEX number to a two byte ascii stream?

1. how often can you subtract \$A of your HEX number before it turns negative?
3. the rest + \$30 is the 2nd byte.

Here's an example:

HEX DEC OPERAND
2A 42 how often does \$A fit ? Whats the Rest?
(4*A)+2 4 * 10 + 2 aahhh, 4 times, 2 rest ... Now add \$30 to each result
byte1 and byte 2 in basic this would be
\$34 and \$32 52 and 50 chr\$(52) + chr\$(50)

Now you can stream \$1B ('ESC') \$5B ('[') \$34 ('4') \$32 ('2') \$3B (';') \$34 ('4') \$32 ('2') \$66 ('f') and the next letters will be printed at position 42,42

My brain is crippled now. more l8r

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