diff --git a/src/3ds.h b/src/3ds.h
index 721b525..fa0fc5e 100644
--- a/src/3ds.h
+++ b/src/3ds.h
@@ -43,7 +43,6 @@ typedef struct _3DS {
 } HLE3DS;
 
 #define R(n) s->cpu.r[n]
-#define RR(n) (s->cpu.rr[n >> 1])
 #define PTR(addr) ((void*) &s->virtmem[addr])
 
 #define PAGE_SIZE BIT(12)
diff --git a/src/arm/arm_core.h b/src/arm/arm_core.h
index 5c6b096..6e65e0f 100644
--- a/src/arm/arm_core.h
+++ b/src/arm/arm_core.h
@@ -38,7 +38,6 @@ typedef struct _ArmCore {
             u32 lr;
             u32 pc;
         };
-        u64 rr[8];
     };
 
     union {
diff --git a/src/pica/gpu.c b/src/pica/gpu.c
index 2d2051e..6b3ed78 100644
--- a/src/pica/gpu.c
+++ b/src/pica/gpu.c
@@ -903,6 +903,11 @@ void load_tex_image(void* rawdata, int w, int h, int level, int fmt) {
 }
 
 void gpu_load_texture(GPU* gpu, int id, TexUnitRegs* regs, u32 fmt) {
+    if ((regs->addr << 3) < VRAM_PBASE) {
+        // games setup textures with NULL sometimes
+        return;
+    }
+
     FBInfo* fb = fbcache_find(gpu, regs->addr << 3);
     glActiveTexture(GL_TEXTURE0 + id);
     if (fb) {
@@ -1091,8 +1096,8 @@ void gpu_update_gl_state(GPU* gpu) {
         glDepthMask(false);
     }
 
-    // we need to always enable the depth test, since the pica can still write
-    // the depth buffer even if depth testing is disabled
+    // we need to always enable the depth test, since the pica can still
+    // write the depth buffer even if depth testing is disabled
     glEnable(GL_DEPTH_TEST);
     if (gpu->io.fb.color_mask.depthtest) {
         glDepthFunc(compare_func[gpu->io.fb.color_mask.depthfunc & 7]);
diff --git a/src/pica/shader.c b/src/pica/shader.c
index 9e17c5b..739fb4c 100644
--- a/src/pica/shader.c
+++ b/src/pica/shader.c
@@ -152,6 +152,17 @@ void shader_run(ShaderUnit* shu) {
                 DEST(res, 1);
                 break;
             }
+            case PICA_DPH: {
+                fvec a, b;
+                SRC1(a, 1);
+                SRC2(b, 1);
+                fvec res;
+                res[0] =
+                    MUL(a[0], b[0]) + MUL(a[1], b[1]) + MUL(a[2], b[2]) + b[3];
+                res[1] = res[2] = res[3] = res[0];
+                DEST(res, 1);
+                break;
+            }
             case PICA_DST:
             case PICA_DSTI: {
                 fvec a, b;
diff --git a/src/pica/shader.h b/src/pica/shader.h
index 5176da5..24f4766 100644
--- a/src/pica/shader.h
+++ b/src/pica/shader.h
@@ -12,6 +12,7 @@ enum {
     PICA_ADD = 0x00,
     PICA_DP3 = 0x01,
     PICA_DP4 = 0x02,
+    PICA_DPH = 0x03,
     PICA_DST = 0x04,
     PICA_EX2 = 0x05,
     PICA_LG2 = 0x06,
diff --git a/src/pica/shaderjit/shaderjit_x86.cpp b/src/pica/shaderjit/shaderjit_x86.cpp
index 4ce1128..24b83fc 100644
--- a/src/pica/shaderjit/shaderjit_x86.cpp
+++ b/src/pica/shaderjit/shaderjit_x86.cpp
@@ -284,6 +284,15 @@ void ShaderCode::compileBlock(ShaderUnit* shu, u32 start, u32 len) {
                 DEST(xmm0, 1);
                 break;
             }
+            case PICA_DPH: {
+                SRC1(xmm0, 1);
+                SRC2(xmm1, 1);
+                insertps(xmm0, ones, 0 << 6 | 3 << 4); // src1[3] = 1
+                setupMul();
+                dpps(xmm0, xmm1, 0xff);
+                DEST(xmm0, 1);
+                break;
+            }
             case PICA_MUL: {
                 SRC1(xmm0, 1);
                 SRC2(xmm1, 1);
diff --git a/src/services.h b/src/services.h
index 94bef05..cfe91ee 100644
--- a/src/services.h
+++ b/src/services.h
@@ -2,6 +2,7 @@
 #define SERVICE_DATA_H
 
 #include "services/ac.h"
+#include "services/act.h"
 #include "services/am.h"
 #include "services/apt.h"
 #include "services/boss.h"
diff --git a/src/services/act.c b/src/services/act.c
new file mode 100644
index 0000000..bde7138
--- /dev/null
+++ b/src/services/act.c
@@ -0,0 +1,15 @@
+#include "act.h"
+
+#include "../3ds.h"
+
+DECL_PORT(act) {
+    u32* cmdbuf = PTR(cmd_addr);
+    switch (cmd.command) {
+        default:
+            lwarn("unknown command 0x%04x (%x,%x,%x,%x,%x)", cmd.command,
+                  cmdbuf[1], cmdbuf[2], cmdbuf[3], cmdbuf[4], cmdbuf[5]);
+            cmdbuf[0] = IPCHDR(1, 0);
+            cmdbuf[1] = 0;
+            break;
+    }
+}
\ No newline at end of file
diff --git a/src/services/act.h b/src/services/act.h
new file mode 100644
index 0000000..4ededb0
--- /dev/null
+++ b/src/services/act.h
@@ -0,0 +1,8 @@
+#ifndef ACT_H
+#define ACT_H
+
+#include "../srv.h"
+
+DECL_PORT(act);
+
+#endif
diff --git a/src/services/apt.c b/src/services/apt.c
index d25592c..3712ed4 100644
--- a/src/services/apt.c
+++ b/src/services/apt.c
@@ -158,6 +158,13 @@ DECL_PORT(apt) {
             cmdbuf[2] = s->services.apt.application_cpu_time_limit;
             break;
         }
+        case 0x0101: {
+            linfo("GetTargetPlatform");
+            cmdbuf[0] = IPCHDR(2, 0);
+            cmdbuf[1] = 0;
+            cmdbuf[2] = 0; // 0 for old 3ds
+            break;
+        }
         default:
             lwarn("unknown command 0x%04x (%x,%x,%x,%x,%x)", cmd.command,
                   cmdbuf[1], cmdbuf[2], cmdbuf[3], cmdbuf[4], cmdbuf[5]);
diff --git a/src/srv.c b/src/srv.c
index ee80139..4e31f46 100644
--- a/src/srv.c
+++ b/src/srv.c
@@ -132,6 +132,8 @@ DECL_PORT(srv) {
                 handler = port_handle_cam;
             } else if (IS("ir:USER")) {
                 handler = port_handle_ir;
+            } else if (IS("act:u")) {
+                handler = port_handle_act;
             } else {
                 lerror("unknown service '%s'", name);
                 cmdbuf[1] = -1;
diff --git a/src/svc.c b/src/svc.c
index 4b27077..2de09a3 100644
--- a/src/svc.c
+++ b/src/svc.c
@@ -106,7 +106,7 @@ DECL_SVC(ExitThread) {
 }
 
 DECL_SVC(SleepThread) {
-    s64 timeout = RR(0);
+    s64 timeout = R(0) | (u64) R(1) << 32;
 
     R(0) = 0;
     thread_sleep(s, CUR_THREAD, timeout);
@@ -284,7 +284,7 @@ DECL_SVC(ArbitrateAddress) {
     u32 addr = R(1);
     u32 type = R(2);
     s32 value = R(3);
-    s64 time = RR(4);
+    s64 time = R(4) | (u64) R(5) << 32;
 
     KArbiter* arbiter = HANDLE_GET_TYPED(h, KOT_ARBITER);
     if (!arbiter) {
@@ -371,7 +371,7 @@ DECL_SVC(CloseHandle) {
 DECL_SVC(WaitSynchronization1) {
     u32 handle = R(0);
 
-    s64 timeout = RR(2);
+    s64 timeout = R(2) | (u64) R(3) << 32;
 
     KObject* obj = HANDLE_GET(handle);
     if (!obj) {
@@ -395,7 +395,7 @@ DECL_SVC(WaitSynchronizationN) {
     u32* handles = PTR(R(1));
     int count = R(2);
     bool waitAll = R(3);
-    s64 timeout = (u64) R(0) | (u64) R(4) << 32;
+    s64 timeout = R(0) | (u64) R(4) << 32;
 
     bool wokeup = false;
     int wokeupi = 0;
@@ -451,8 +451,25 @@ DECL_SVC(DuplicateHandle) {
 }
 
 DECL_SVC(GetSystemTick) {
-    RR(0) = s->sched.now;
-    s->sched.now += 200;
+    R(0) = s->sched.now;
+    R(1) = s->sched.now >> 32;
+    s->sched.now += 200; // make time advance so the next read happens later
+}
+
+DECL_SVC(GetProcessInfo) {
+    u32 type = R(2);
+
+    R(0) = 0;
+    switch (type) {
+        case 0x14: // linear memory address conversion
+            R(1) = FCRAM_PBASE - LINEAR_HEAP_BASE;
+            R(2) = 0;
+            break;
+        default:
+            R(0) = -1;
+            lerror("unknown process info");
+            break;
+    }
 }
 
 DECL_SVC(ConnectToPort) {
diff --git a/src/svcs.inc b/src/svcs.inc
index 193bb4c..8d726fc 100644
--- a/src/svcs.inc
+++ b/src/svcs.inc
@@ -19,6 +19,7 @@ SVC(0x24, WaitSynchronization1)
 SVC(0x25, WaitSynchronizationN)
 SVC(0x27, DuplicateHandle)
 SVC(0x28, GetSystemTick)
+SVC(0x2b, GetProcessInfo)
 SVC(0x2d, ConnectToPort)
 SVC(0x32, SendSyncRequest)
 SVC(0x35, GetProcessId)