IRQ work in BIOS

include/65c816.h

@@ -23,9 +23,7 @@
     long_i \
     pha \
     phx \
-    phy \
+    phy
-    short_a \
-    long_i
 
 #define restore_registers \
     long_a \
@@ -33,6 +31,4 @@
     ply \
     plx \
     pla \
-    plp \
+    plp
-    short_a \
-    long_i

src/bios/cstartup.s

@@ -16,7 +16,7 @@
               .extern _NearBaseAddress
 #endif
 
-#include "bios/macros.h"
+#include "macros.h"
 
 ;;; ***************************************************************************
 ;;;

src/bios/irq.c

@@ -5,3 +5,129 @@
 //
 // Copyright © 2024 Kyle J Cardoza <Kyle.Cardoza@icloud.com>
 
+#include <stdint.h>
+
+// Return values from handlers, if any, should be stored in
+// DP[0] for the C register, DP[4] for the X register, and
+// DP[6] for the Y register.
+extern uint16_t Dp[4];
+
+void irq_handler(void) {
+    return;
+}
+
+void brk_irq_handler(void) {
+    return;
+}
+
+void abort_irq_handler(void) {
+    return;
+}
+
+void nmi_handler(void) {
+    return;
+}
+
+void timer0_irq_handler(void) {
+    return;
+}
+
+void timer1_irq_handler(void) {
+    return;
+}
+
+void timer2_irq_handler(void) {
+    return;
+}
+
+void timer3_irq_handler(void) {
+    return;
+}
+
+void timer4_irq_handler(void) {
+    return;
+}
+
+void timer5_irq_handler(void) {
+    return;
+}
+
+void timer6_irq_handler(void) {
+    return;
+}
+
+void timer7_irq_handler(void) {
+    return;
+}
+
+void pe56_irq_handler(void) {
+    return;
+}
+
+void ne57_irq_handler(void) {
+    return;
+}
+
+void pe60_irq_handler(void) {
+    return;
+}
+
+void pe62_irq_handler(void) {
+    return;
+}
+
+void ne64_irq_handler(void) {
+    return;
+}
+
+void ne66_irq_handler(void) {
+    return;
+}
+
+void pib_irq_handler(void) {
+    return;
+}
+
+void level_irq_handler(void) {
+    return;
+}
+
+void uart_0_rx_irq_handler(void) {
+    return;
+}
+
+void uart_0_tx_irq_handler(void) {
+    return;
+}
+
+void uart_1_rx_irq_handler(void) {
+    return;
+}
+
+void uart_1_tx_irq_handler(void) {
+    return;
+}
+
+void uart_2_rx_irq_handler(void) {
+    return;
+}
+
+void uart_2_tx_irq_handler(void) {
+    return;
+}
+
+void uart_3_rx_irq_handler(void) {
+    return;
+}
+
+void uart_3_tx_irq_handler(void) {
+    return;
+}
+
+void cop_handler(uint16_t arg_c, uint16_t arg_x, uint16_t arg_y) {
+    (void) arg_c;
+    (void) arg_x;
+    (void) arg_y;
+    return;
+}
+

src/bios/irq_trampoline.s

@@ -10,95 +10,291 @@
 //;
 //; Copyright © 2024 Kyle J Cardoza <Kyle.Cardoza@icloud.com>
 
+#include "macros.h"
+#include "sentinel65x.h"
+
+    .extern _Dp
+
+    .extern irq_handler
+
     ; This section gets copied to 0x00F000
     .section irq_trampolines
 
 reserved_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 timer0_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 timer1_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 timer2_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 timer3_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 timer4_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 timer5_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 timer6_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 timer7_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 pe56_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 ne57_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 pe60_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 pe62_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 ne64_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 ne66_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 pib_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 level_irq: 
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy                   
+
+    call long:irq_handler
+    jump interrupt_return
+
 
 uart_0_rx_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 uart_0_tx_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 uart_1_rx_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 uart_1_tx_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 uart_2_rx_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 uart_2_tx_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 uart_3_rx_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 uart_3_tx_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 cop_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 brk_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 abort_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    jump interrupt_return
 
 nmi_irq:
-    rti
+    phb                   
+    phd                   
+    rep #0b00110000        
+    pha                   
+    phx                   
+    phy    
+    .extern nmi_handler
+    long_a
+    call long:nmi_handler
+    jump interrupt_return
+
+interrupt_return:
+    rep #0b00110000
+    ply
+    plx
+    pla
+    pld
+    plb
+    jump interrupt_return
 
     ; This section gets copied to 0x00FF80
     .section irq_vectors

src/boot/boot.s

@@ -5,7 +5,7 @@
 //;
 //; Copyright © 2024 Kyle J Cardoza <Kyle.Cardoza@icloud.com>
 
-#include "boot/sentinel65x.h"
+#include "sentinel65x.h"
 
               .section code, noreorder
               .pubweak __program_root_section