diff options
Diffstat (limited to 'atk16_ast_walking_compiler/ast_compiler_bootstrap.atk16')
| -rw-r--r-- | atk16_ast_walking_compiler/ast_compiler_bootstrap.atk16 | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/atk16_ast_walking_compiler/ast_compiler_bootstrap.atk16 b/atk16_ast_walking_compiler/ast_compiler_bootstrap.atk16 new file mode 100644 index 0000000..b38e5f5 --- /dev/null +++ b/atk16_ast_walking_compiler/ast_compiler_bootstrap.atk16 @@ -0,0 +1,74 @@ +;; BEGIN BOOTSTRAP + +@use ext_std:* + +@let sp RH ; stack pointer (points to empty slot at top of stack) +@let fp RG ; frame pointer (points to base of currently active frame) + +@let vector_table 0x10 +@let vt_ISR0 0x10 ; ISR0 +@let vt_ISR1 0x11 ; ISR1 +@let vt_ISR2 0x12 ; ISR2 +@let vt_ISR3 0x13 ; ISR3 +@let vt_stack_addr 0x14 ; Stack address +@let vt_term_pp_addr 0x15 ; Terminal peripheral address +@let vt_kb_pp_addr 0x16 ; Keyboard peripheral address +@let vt_gr_mode_addr 0x17 ; Graphics mode setting address +@let vt_sprite_mem 0x18 ; Sprite memory address +@let vt_text_mem 0x19 ; Text memory buffer address + +@let stack_segment 0x8000 +@let mmio_segment 0xE7F0 +@let terminal_addr 0xE7F0 +@let keyboard_addr 0xE7F1 +@let gr_mode_addr 0xE7F2 +@let sprite_mem 0xE800 +@let text_mem 0xF800 + +@let gr_disabled_mode 0b00 +@let gr_text_mode 0b01 +@let gr_sprite_mode 0b10 + +@address 0x0 + ldi vt_stack_addr RA + ldr RA SP + mov SP FP + jpi program_segment + +@address vector_table + keyboard_isr ; 0x10 + hlt_isr ; 0x11 + hlt_isr ; 0x12 + hlt_isr ; 0x13 + stack_segment ; 0x14 + terminal_addr ; 0x15 + keyboard_addr ; 0x16 + gr_mode_addr ; 0x17 + sprite_mem ; 0x18 + text_mem ; 0x19 + +@label hlt_isr + hlt + +@label keyboard_isr + spu RA + spu RB + ldi vt_kb_pp_addr RA + ldr RA RA + ldr RA RA + ldi vt_term_pp_addr RB + ldr RB RB + str RA RB + spo RB + spo RA + rti + +@label program_segment + ldi vt_gr_mode_addr RA + ldr RA RA + ldi gr_disabled_mode RB + str RB RA + + jpi main + +;; END BOOTSTRAP
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