[WIP] PiSCSI boot ROM experiments

[pistorm] / platforms / amiga / amiga-platform.c

diff --git a/platforms/amiga/amiga-platform.c b/platforms/amiga/amiga-platform.c
index 269acb5aa25909a274bf990f2bb53af86149c458..76621cd76c1c94cceb7db3b30c8cb020e5916940 100644 (file)
--- a/platforms/amiga/amiga-platform.c
+++ b/platforms/amiga/amiga-platform.c
@@ -16,11 +16,13 @@ int handle_register_read_amiga(unsigned int addr, unsigned char type, unsigned i
 int handle_register_write_amiga(unsigned int addr, unsigned int value, unsigned char type);
 int init_rtg_data();
 
+extern int ac_z2_current_pic;
 extern int ac_z2_done;
 extern int ac_z2_pic_count;
 extern int ac_z2_type[AC_PIC_LIMIT];
 extern int ac_z2_index[AC_PIC_LIMIT];
 
+extern int ac_z3_current_pic;
 extern int ac_z3_pic_count;
 extern int ac_z3_done;
 extern int ac_z3_type[AC_PIC_LIMIT];
@@ -42,6 +44,11 @@ extern unsigned char cdtv_sram[32 * SIZE_KILO];
 
 static uint8_t rtg_enabled = 0, piscsi_enabled = 0, pinet_enabled = 0;
 
+extern uint32_t piscsi_base;
+extern uint8_t piscsi_diag_read = 0;
+
+extern void stop_cpu_emulation(uint8_t disasm_cur);
+
 inline int custom_read_amiga(struct emulator_config *cfg, unsigned int addr, unsigned int *val, unsigned char type) {
     if (!ac_z2_done && addr >= AC_Z2_BASE && addr < AC_Z2_BASE + AC_SIZE) {
         if (ac_z2_pic_count == 0) {
@@ -70,6 +77,13 @@ inline int custom_read_amiga(struct emulator_config *cfg, unsigned int addr, uns
         }
     }
 
+    if (addr >= piscsi_base && addr < piscsi_base + (64 * SIZE_KILO)) {
+        printf("[Amiga-Custom] %s read from PISCSI base @$%.8X.\n", op_type_names[type], addr);
+        stop_cpu_emulation(1);
+        *val = handle_piscsi_read(addr, type);
+        return 1;
+    }
+
     return -1;
 }
 
@@ -108,6 +122,12 @@ inline int custom_write_amiga(struct emulator_config *cfg, unsigned int addr, un
         }
     }
 
+    if (addr >= piscsi_base && addr < piscsi_base + (64 * SIZE_KILO)) {
+        printf("[Amiga-Custom] %s write to PISCSI base @$%.8x: %.8X\n", op_type_names[type], addr, val);
+        handle_piscsi_write(addr, val, type);
+        return 1;
+    }
+
     return -1;
 }
 
@@ -158,6 +178,9 @@ void adjust_ranges_amiga(struct emulator_config *cfg) {
         else
             cfg->custom_low = min(cfg->custom_low, PISCSI_OFFSET);
         cfg->custom_high = max(cfg->custom_high, PISCSI_UPPER);
+        if (piscsi_base != 0) {
+            cfg->custom_low = min(cfg->custom_low, piscsi_base);
+        }
     }
     if (pinet_enabled) {
         if (cfg->custom_low == 0)
@@ -373,6 +396,9 @@ void setvar_amiga(struct emulator_config *cfg, char *var, char *val) {
 void handle_reset_amiga(struct emulator_config *cfg) {
     ac_z3_done = 0;
     ac_z2_done = 0;
+    ac_z2_current_pic = 0;
+    ac_z3_current_pic = 0;
+    piscsi_diag_read = 0;
 
     adjust_ranges_amiga(cfg);
 }