Character Printing demo screen

Chimera Cartridge

Entry posted by mos6507 July 1, 2008

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Here is a photo of my screen running the character printing demo. The Atari is feeding characters into the character print API function. The ARM does the rendering to queues, and then serves the queues in the kernel itself.

Here is what some of the code looks like:

	ldy #0	
ldx #0
.keep_printing
lda CHIMERA_LINE,X
jsr print_character
inx

cpx #12
bne .keep_printing

ldy #3	
ldx #0
.keep_printing2
lda Character,X
jsr print_character
inx

cpx #9
bne .keep_printing2


ldy #4	
ldx #0
.keep_printing3
lda Printing,X
jsr print_character
inx

cpx #11
bne .keep_printing3



ldy #5	
ldx #0
.keep_printingDash
lda Dash,X
jsr print_character
inx

cpx #12
bne .keep_printingDash



ldy #6	
ldx #0
.keep_printing4
lda Model,X
jsr print_character
inx

cpx #7
bne .keep_printing4

ldy #7	
ldx #0
.keep_printing5
lda Arm,X
jsr print_character
inx

cpx #10
bne .keep_printing5


ldy #8	
ldx #0
.keep_printing6
lda Speed,X
jsr print_character
inx

cpx #12
bne .keep_printing6




ldy #9	
ldx #0
.TopChip
lda TopChip,X
jsr print_character
inx

cpx #11
bne .TopChip




lda #0
sta temp2

.do_again
lda #9
adc temp2
tay

ldx #0
.SideChip
lda SideChip,X
jsr print_character
inx

cpx #11
bne .SideChip

inc temp2
ldx temp2		
cpx #15
bne .do_again




ldy #24
ldx #0
.BottomChip
lda BottomChip,X
jsr print_character
inx

cpx #11
bne .BottomChip




print_character
  STA 	temp; save the character

 ;ID
  LDA	#0
  STA	CH_COMMAND
  LDA	#1
  STA	CH_COMMAND  

 ;ARGUMENTS

  STX	CH_COMMAND; x coordinate
  STY	CH_COMMAND; y coordinate
  
  LDA	#0
  STA	CH_COMMAND
  
  LDA 	temp;get the character back
  STA	CH_COMMAND 

.WAIT_STATUS
  LDA	CH_STATUS
  CMP	#CH_FUNC_DONE
  BNE	.WAIT_STATUS
  RTS

..................

CHIMERA_LINE
byte "Chimera Demo"
Character
byte "Character"
Printing	
byte "printing..."	

Model
byte "LPC2368"
Arm
byte "ARM7TDMI-S"
Speed
byte "72Mhz 32-bit"


Dash
byte $12,$12,$12,$12,$12,$12,$12,$12,$12,$12,$12,$12



TopChip 
byte " ",$11,$18,$18,$18,$18,$18,$18,$18,$18,$05


SideChip 
byte " ",$04,160,160,160,160,160,160,160,160,$01


BottomChip
byte " ",$1A,$17,$17,$17,$17,$17,$17,$17,$17,$03

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