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hello gp routines

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This commit is contained in:
Edward R. Gonzalez
2025-08-03 22:01:36 -04:00
parent 0a47b03dfa
commit 6e7809848b
6 changed files with 135 additions and 91 deletions
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code/graphics_system/gp.s
+40
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@@ -127,3 +127,43 @@ gp_b16_Y equ 16
load_imm reg_scratch, cmd
store_word reg_scratch, port
.endmacro
.org 0x80010000 + 2000
.func gp_draw_tri_flat ;(
@@io_offset equ rarg_0
@@color equ rarg_1
@@vert_1 equ rarg_2
@@vert_2 equ rarg_3
@@vert_3 equ rstatic_0
;)
@@cmd equ rtmp_2
load_imm @@cmd, gp_Polygon
or @@cmd, @@cmd, @@color
store_word @@cmd, gpio_port0(@@io_offset)
store_word @@vert_1, gpio_port0(@@io_offset)
store_word @@vert_2, gpio_port0(@@io_offset)
store_word @@vert_3, gpio_port0(@@io_offset)
jump_reg rret_addr :: nop
.endfunc
.func gp_draw_tri_grouand ;(
@@io_offset equ rarg_0
@@color equ rarg_1
@@color_2 equ rstatic_1
@@color_3 equ rstatic_2
@@vert_1 equ rarg_2
@@vert_2 equ rarg_3
@@vert_3 equ rstatic_0
;)
@@cmd equ rtmp_2
load_imm @@cmd, gp_Polygon | gp_Poly_ShadeGourand
or @@cmd, @@cmd, @@color
store_word @@cmd, gpio_port0(@@io_offset)
store_word @@vert_1, gpio_port0(@@io_offset)
store_word @@color_2, gpio_port0(@@io_offset)
store_word @@vert_2, gpio_port0(@@io_offset)
store_word @@color_3, gpio_port0(@@io_offset)
store_word @@vert_3, gpio_port0(@@io_offset)
jump_reg rret_addr :: nop
.endfunc