diff --git a/hw/xbox/dsp/Makefile.objs b/hw/xbox/dsp/Makefile.objs
index eb44da36e8..93a180dee6 100644
--- a/hw/xbox/dsp/Makefile.objs
+++ b/hw/xbox/dsp/Makefile.objs
@@ -1 +1 @@
-obj-y += dsp.o dsp_cpu.o
+obj-y += dsp.o dsp_cpu.o dsp_dma.o
diff --git a/hw/xbox/dsp/dsp.c b/hw/xbox/dsp/dsp.c
index 06b8a6acdb..56b7585678 100644
--- a/hw/xbox/dsp/dsp.c
+++ b/hw/xbox/dsp/dsp.c
@@ -172,10 +172,11 @@ void dsp_run(DSPState* dsp, int cycles)
 
 } 
 
-void dsp_bootstrap(DSPState* dsp, const uint32_t* pram, size_t len)
+void dsp_bootstrap(DSPState* dsp)
 {
-    assert(sizeof(dsp->core.pram) >= len);
-    memcpy(dsp->core.pram, pram, len);
+    // scratch memory is dma'd in to pram by the bootrom
+    dsp->dma.scratch_rw(dsp->dma.scratch_rw_opaque,
+        (uint8_t*)dsp->core.pram, 0, 0x600, false);
 }
 
 void dsp_start_frame(DSPState* dsp)
diff --git a/hw/xbox/dsp/dsp.h b/hw/xbox/dsp/dsp.h
index f2b014313d..0ea3d038de 100644
--- a/hw/xbox/dsp/dsp.h
+++ b/hw/xbox/dsp/dsp.h
@@ -32,7 +32,7 @@
 typedef struct DSPState DSPState;
 
 typedef void (*dsp_scratch_rw_func)(
-    uint8_t* ptr, uint64_t addr, size_t len, bool dir);
+    void* opaque, uint8_t* ptr, uint64_t addr, size_t len, bool dir);
 
 /* Dsp commands */
 DSPState* dsp_init(void* scratch_rw_opaque, dsp_scratch_rw_func scratch_rw);
@@ -42,7 +42,7 @@ void dsp_reset(DSPState* dsp);
 void dsp_step(DSPState* dsp);
 void dsp_run(DSPState* dsp, int cycles);
 
-void dsp_bootstrap(DSPState* dsp, const uint32_t* pmem, size_t len);
+void dsp_bootstrap(DSPState* dsp);
 void dsp_start_frame(DSPState* dsp);
 
 
diff --git a/hw/xbox/dsp/dsp_cpu.c b/hw/xbox/dsp/dsp_cpu.c
index beadb4dd97..90e42bfaa3 100644
--- a/hw/xbox/dsp/dsp_cpu.c
+++ b/hw/xbox/dsp/dsp_cpu.c
@@ -359,6 +359,7 @@ void dsp56k_reset_cpu(dsp_core_t* dsp)
 {
     int i;
     if (!matches_initialised) {
+        matches_initialised = true;
         for (i=0; i<ARRAYSIZE(nonparallel_opcodes); i++) {
             const OpcodeEntry t = nonparallel_opcodes[i];
             assert(strlen(t.template) == 24);
@@ -376,7 +377,6 @@ void dsp56k_reset_cpu(dsp_core_t* dsp)
             nonparallel_matches[i][0] = mask;
             nonparallel_matches[i][1] = match;
         }
-        matches_initialised = true;
     }
 
     /* Memory */
@@ -411,7 +411,6 @@ void dsp56k_reset_cpu(dsp_core_t* dsp)
 
     /* runtime shit */
 
-
     dsp->executing_for_disasm = false;
     // start_time = SDL_GetTicks();
     dsp->num_inst = 0;
@@ -480,7 +479,7 @@ static uint16_t disasm_instruction(dsp_core_t* dsp, dsp_trace_disasm_t mode)
 static void disasm_reg_save(dsp_core_t* dsp)
 {
     memcpy(dsp->disasm_registers_save, dsp->registers , sizeof(dsp->disasm_registers_save));
-#if DSP_DISASM_REG_PC
+#ifdef DSP_DISASM_REG_PC
     dsp->pc_save = dsp->pc;
 #endif
 }
@@ -566,7 +565,7 @@ static void disasm_reg_compare(dsp_core_t* dsp)
         }
     }
 
-#if DSP_DISASM_REG_PC
+#ifdef DSP_DISASM_REG_PC
     if (pc_save != dsp->pc) {
         fprintf(stderr,"\tReg: pc  $%04x -> $%04x\n", pc_save, dsp->pc);
     }
diff --git a/hw/xbox/dsp/dsp_dma.c b/hw/xbox/dsp/dsp_dma.c
index 9780a53852..75d2511b34 100644
--- a/hw/xbox/dsp/dsp_dma.c
+++ b/hw/xbox/dsp/dsp_dma.c
@@ -96,12 +96,11 @@ static void dsp_dma_run(DSPDMAState *s)
 
         uint8_t* scratch_buf = calloc(count, item_size);
 
-        assert(s->scratch_rw);
-
         if (control & NODE_CONTROL_DIRECTION) {
             int i;
             for (i=0; i<count; i++) {
-                uint32_t v = dsp56k_read_memory(s->core, mem_space, mem_address+i);
+                uint32_t v = dsp56k_read_memory(s->core,
+                    mem_space, mem_address+i);
                 switch(item_size) {
                 case 4:
                     *(uint32_t*)(scratch_buf + i*4) = v;
@@ -113,10 +112,12 @@ static void dsp_dma_run(DSPDMAState *s)
             }
 
             // write to scratch memory
-            s->scratch_rw(scratch_buf, scratch_addr, count*item_size, 1);
+            s->scratch_rw(s->scratch_rw_opaque,
+                scratch_buf, scratch_addr, count*item_size, 1);
         } else {
             // read from scratch memory
-            s->scratch_rw(scratch_buf, scratch_addr, count*item_size, 0);
+            s->scratch_rw(s->scratch_rw_opaque,
+                scratch_buf, scratch_addr, count*item_size, 0);
 
             int i;
             for (i=0; i<count; i++) {
diff --git a/hw/xbox/dsp/dsp_emu.inl b/hw/xbox/dsp/dsp_emu.inl
index e2dfbc19e5..46119ccef6 100644
--- a/hw/xbox/dsp/dsp_emu.inl
+++ b/hw/xbox/dsp/dsp_emu.inl
@@ -7835,12 +7835,6 @@ static void emu_stop(dsp_core_t* dsp)
     DPRINTF("Dsp: STOP instruction\n");
 }
 
-static void emu_swi(dsp_core_t* dsp)
-{
-    /* Raise interrupt p:0x0006 */
-    dsp->instr_cycle += 6;
-}
-
 static void emu_sub_imm(dsp_core_t* dsp)
 {
     uint32_t xx = (dsp->cur_inst >> 8) & BITMASK(6);