Use vectors for irq and nmi

2023-11-21 18:53:17 -08:00
parent 1714a1e6da
commit 102c4dfe8a
6 changed files with 254 additions and 325 deletions
--- a/sw/kernel/devices/interrupt_controller.s
+++ b/sw/kernel/devices/interrupt_controller.s
@@ -9,6 +9,8 @@
 .export _disable_irq
 .export _send_eoi

+.import irq_int, nmi_int
+
 IRQ_CMD_ADDR    = $effc
 IRQ_DAT_ADDR    = $effd

@@ -19,11 +21,24 @@ IRQ_CMD_ENABLE  = $20
 IRQ_CMD_TYPE    = $40
 IRQ_CMD_EOI     = $ff

+IRQ_VECTOR = $220
+NMI_VECTOR = $222
+
 .code

 ; void init_irq();
 ; mask all IRQs, set all type to edge.
 .proc _init_interrupt_controller
+    lda #<irq_int
+    sta IRQ_VECTOR
+    lda #>irq_int
+    sta IRQ_VECTOR+1
+
+    lda #<nmi_int
+    sta NMI_VECTOR
+    lda #>nmi_int
+    sta NMI_VECTOR+1
+
    ldx #$20    ; enable
    ldy #00
    jsr cmd_all