diff --git a/Makefile b/Makefile
index e04200b..923ae72 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ CC ?= gcc
 ARCH = -m32
 CFLAGS += -Wall -Werror -Wfatal-errors -Wno-error=unused-variable -fstack-protector -std=c2x -g
 CFLAGS += -DDEBUG
-CFLAGS += -DDEBUG_PRINT
+#CFLAGS += -DDEBUG_PRINT
 OPT ?= -O0
 DEPFLAGS = -MMD -MP
 
diff --git a/c/decode.c b/c/decode.c
index 2d0db7f..6489198 100644
--- a/c/decode.c
+++ b/c/decode.c
@@ -103,7 +103,8 @@ static inline int32_t aligned_s4(const void * buf)
   uint32_t opcode = code[pc + 1];               \
   uint32_t index = _u2(&code[pc + 2]);          \
   uint32_t wide_next_pc = pc + 4;               \
-  int32_t _const;
+  int32_t _const;                               \
+  (void)_const;
 
 #define WIDE_IMPL()                             \
   switch (opcode) {                             \
diff --git a/c/frame.c b/c/frame.c
index b5fe374..019b980 100644
--- a/c/frame.c
+++ b/c/frame.c
@@ -299,6 +299,7 @@ void vm_method_call(struct vm * vm, struct class_entry * class_entry, struct met
   }
 
   vm->current_frame->pc = 0;
+  vm->current_frame->next_pc = 0;
   vm->current_frame->class_entry = class_entry;
   vm->current_frame->method = method_info;
 
diff --git a/java/io/PrintStream.java b/java/io/PrintStream.java
index 9a74412..a817904 100644
--- a/java/io/PrintStream.java
+++ b/java/io/PrintStream.java
@@ -1,6 +1,7 @@
 package java.io;
 
 import java.lang.String;
+import java.lang.Integer;
 
 public class PrintStream
 {
@@ -25,6 +26,11 @@ public class PrintStream
         write(newline);
     }
 
+    public void println(int n) {
+        write(Integer.toString(n).getBytes());
+        write(newline);
+    }
+
     public void print(byte[] buf) {
         write(buf);
     }
@@ -32,4 +38,8 @@ public class PrintStream
     public void print(String s) {
         write(s.getBytes());
     }
+
+    public void print(int n) {
+        write(Integer.toString(n).getBytes());
+    }
 }
diff --git a/p/Nested.java b/p/Nested.java
new file mode 100644
index 0000000..7319032
--- /dev/null
+++ b/p/Nested.java
@@ -0,0 +1,19 @@
+package p;
+
+class NestedFoo {
+    public class NestedBar {
+        public static int baz(int n) {
+            return n + 10;
+        }
+    }
+}
+
+public class Nested {
+    public static int test() {
+        return NestedFoo.NestedBar.baz(42);
+    }
+
+    public static void main() {
+        System.out.println(test());
+    }
+}
diff --git a/regs/bits.py b/regs/bits.py
new file mode 100644
index 0000000..be748e5
--- /dev/null
+++ b/regs/bits.py
@@ -0,0 +1,98 @@
+from dataclasses import dataclass
+from typing import Union
+from collections import defaultdict
+
+def parse_bit_number(s):
+    assert '-' not in s, s
+    assert ',' not in s, s
+    return int(s, 10)
+
+def parse_bit_set(s, split_char, maxsplit):
+    #assert len(list(c for c in s if c == split_char)) == 1, s
+    split = list(map(parse_bit_number, s.split(split_char, maxsplit=maxsplit)))
+    for i in range(len(split) - 1):
+        left = split[i]
+        right = split[i+1]
+        assert left > right, (left, right)
+    return split
+
+def parse_bit_range(s):
+    if '-' in s:
+        left, right = parse_bit_set(s, '-', 1)
+        return set(range(right, left+1))
+    elif ',' in s:
+        bits = parse_bit_set(s, ',', -1)
+        return set(bits)
+    else:
+        num = parse_bit_number(s)
+        return set([num])
+
+assert parse_bit_range("4-0") == {4, 3, 2, 1, 0}
+
+def mask_from_bits(bits):
+    mask = 0
+    for b in bits:
+        mask |= 1 << b
+    mask >>= min(bits)
+    return mask
+
+assert mask_from_bits({4, 2}) == 5
+
+def _parse_value(s):
+    if s == "":
+        return None
+    if s.startswith("0x"):
+        return int(s[2:], 16)
+    if s.startswith("0b"):
+        return int(s[2:], 2)
+    if s.startswith("float_"):
+        return s
+    return int(s, 10)
+
+def sign_extend(x, b):
+    m = 1 << (b - 1)
+    x = x & ((1 << b) - 1)
+    r = (x ^ m) - m;
+    return r
+
+def parse_value(s):
+    n = _parse_value(s)
+    if type(n) is int:
+        return sign_extend(n, 32)
+    else:
+        return n
+
+@dataclass
+class Bit:
+    register_name: str
+    enum_name: str
+    bits: set[int]
+    bit_name: str
+    value: int
+    mask: Union[int, str]
+
+@dataclass
+class Enum:
+    enum_name: str
+    bits: list[Bit]
+
+@dataclass
+class Register:
+    register_name: str
+    enums: list[Enum]
+
+def parse_row(row):
+    return Bit(
+        register_name=row["register_name"],
+        enum_name=row["enum_name"],
+        bits=parse_bit_range(row["bits"]),
+        bit_name=row["bit_name"],
+        value=parse_value(row["value"]),
+        mask=parse_value(row["mask"]),
+    )
+
+def group_by_register_enum(bits):
+    group = defaultdict(lambda: defaultdict(list))
+    for bit in bits:
+        group[bit.register_name][bit.enum_name].append(bit)
+    return group
diff --git a/regs/bits_java.py b/regs/bits_java.py
new file mode 100644
index 0000000..89acdad
--- /dev/null
+++ b/regs/bits_java.py
@@ -0,0 +1,44 @@
+from bits import sign_extend
+from bits import mask_from_bits
+
+def generate_bit(bit):
+    if not bit.value and not bit.mask:
+        yield f"public static int {bit.bit_name}(int n) {{"
+        yield f"return (n >> {min(bit.bits)}) & {sign_extend(mask_from_bits(bit.bits), 32)};"
+        yield "}"
+    elif bit.value:
+        assert (bit.value is None) ^ (bit.mask is None), bit
+        yield f"public static final int {bit.bit_name} = {bit.value << min(bit.bits)};"
+    elif bit.mask:
+        assert (bit.value is None) ^ (bit.mask is None), bit
+        yield f"public static int {bit.bit_name}(int n) {{"
+        if type(bit.mask) is str:
+            yield f"return (n & {sign_extend(mask_from_bits(bit.bits), 32)}) << {min(bit.bits)};"
+        else:
+            yield f"return (n & {bit.mask}) << {min(bit.bits)};"
+        yield "}"
+    else:
+        assert False, bit
+
+def generate_bits(bits):
+    for bit in bits:
+        yield from generate_bit(bit)
+
+def generate_enums(enum_group):
+    for enum_name, bits in enum_group.items():
+        if enum_name == "":
+            yield from generate_bits(bits)
+        else:
+            yield f"public class {enum_name} {{"
+            yield from generate_bits(bits)
+            yield "}"
+
+def generate_registers(package_name, class_name, group):
+    yield f"package sega.dreamcast.{package_name};"
+    yield ""
+    yield f"public class {class_name} {{"
+    for register_name, enum_group in group.items():
+        yield f"public class {register_name} {{"
+        yield from generate_enums(enum_group)
+        yield "}"
+    yield "}"
diff --git a/regs/core.py b/regs/core.py
new file mode 100644
index 0000000..2182dd0
--- /dev/null
+++ b/regs/core.py
@@ -0,0 +1,15 @@
+import sys
+
+from csv_input import read_input
+from generate import renderer
+
+from bits import parse_row
+from bits import group_by_register_enum
+from bits_java import generate_registers
+
+if __name__ == "__main__":
+    rows = read_input(sys.argv[1])
+    group = group_by_register_enum(map(parse_row, rows))
+    render, out = renderer(indent_length=4)
+    render(generate_registers("holly", "HollyBits", group))
+    sys.stdout.write(out.getvalue())
diff --git a/sega/dreamcast/holly/HollyBits.java b/sega/dreamcast/holly/HollyBits.java
new file mode 100644
index 0000000..7054e39
--- /dev/null
+++ b/sega/dreamcast/holly/HollyBits.java
@@ -0,0 +1,629 @@
+package sega.dreamcast.holly;
+
+
+public class HollyBits {
+    public class ID {
+        public static int device_id(int n) {
+            return (n >> 16) & 65535;
+        }
+        public static int vendor_id(int n) {
+            return (n >> 0) & 65535;
+        }
+    }
+    public class REVISION {
+        public static int chip_revision(int n) {
+            return (n >> 0) & 65535;
+        }
+    }
+    public class SOFTRESET {
+        public static final int sdram_if_soft_reset = 4;
+        public static final int pipeline_soft_reset = 2;
+        public static final int ta_soft_reset = 1;
+    }
+    public class STARTRENDER {
+        public static final int start_render = 1;
+    }
+    public class TEST_SELECT {
+        public static int diagdb_data(int n) {
+            return (n >> 5) & 31;
+        }
+        public static int diagda_data(int n) {
+            return (n >> 0) & 31;
+        }
+    }
+    public class PARAM_BASE {
+        public static int base_address(int n) {
+            return (n & 15728640) << 0;
+        }
+    }
+    public class REGION_BASE {
+        public static int base_address(int n) {
+            return (n & 16777212) << 0;
+        }
+    }
+    public class SPAN_SORT_CFG {
+        public static final int cache_bypass = 65536;
+        public static final int offset_sort_enable = 256;
+        public static final int span_sort_enable = 1;
+    }
+    public class VO_BORDER_COL {
+        public static int chroma(int n) {
+            return (n & 1) << 24;
+        }
+        public static int red(int n) {
+            return (n & 255) << 16;
+        }
+        public static int green(int n) {
+            return (n & 255) << 8;
+        }
+        public static int blue(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class FB_R_CTRL {
+        public class vclk_div {
+            public static int pclk_vclk_2(int n) {
+                return (n >> 23) & 1;
+            }
+            public static final int pclk_vclk_1 = 8388608;
+        }
+        public static final int fb_strip_buf_en = 4194304;
+        public static int fb_stripsize(int n) {
+            return (n & 62) << 16;
+        }
+        public static int fb_chroma_threshold(int n) {
+            return (n & 255) << 8;
+        }
+        public static int fb_concat(int n) {
+            return (n & 3) << 4;
+        }
+        public static final int fb_line_double = 2;
+        public static final int fb_enable = 1;
+        public class fb_depth {
+            public static int _0555_rgb_16bit(int n) {
+                return (n >> 2) & 3;
+            }
+            public static final int _0565_rgb_16bit = 4;
+            public static final int _888_rgb_24bit_packed = 8;
+            public static final int _0888_rgb_32bit = 12;
+        }
+    }
+    public class FB_W_CTRL {
+        public static int fb_alpha_threshold(int n) {
+            return (n & 255) << 16;
+        }
+        public static int fb_kval(int n) {
+            return (n & 255) << 8;
+        }
+        public static final int fb_dither = 8;
+        public class fb_packmode {
+            public static int _0555_krgb_16bit(int n) {
+                return (n >> 0) & 7;
+            }
+            public static final int _565_rgb_16bit = 1;
+            public static final int _4444_argb_16bit = 2;
+            public static final int _1555_argb_16bit = 3;
+            public static final int _888_rgb_24bit_packed = 4;
+            public static final int _0888_krgb_32bit = 5;
+            public static final int _8888_argb_32bit = 6;
+        }
+    }
+    public class FB_W_LINESTRIDE {
+        public static int fb_line_stride(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class FB_R_SOF1 {
+        public static int frame_buffer_read_address_frame_1(int n) {
+            return (n & 16777212) << 0;
+        }
+    }
+    public class FB_R_SOF2 {
+        public static int frame_buffer_read_address_frame_2(int n) {
+            return (n & 16777212) << 0;
+        }
+    }
+    public class FB_R_SIZE {
+        public static int fb_modulus(int n) {
+            return (n & 1023) << 20;
+        }
+        public static int fb_y_size(int n) {
+            return (n & 1023) << 10;
+        }
+        public static int fb_x_size(int n) {
+            return (n & 1023) << 0;
+        }
+    }
+    public class FB_W_SOF1 {
+        public static int frame_buffer_write_address_frame_1(int n) {
+            return (n & 33554428) << 0;
+        }
+    }
+    public class FB_W_SOF2 {
+        public static int frame_buffer_write_address_frame_2(int n) {
+            return (n & 33554428) << 0;
+        }
+    }
+    public class FB_X_CLIP {
+        public static int fb_x_clip_max(int n) {
+            return (n & 2047) << 16;
+        }
+        public static int fb_x_clip_min(int n) {
+            return (n & 2047) << 0;
+        }
+    }
+    public class FB_Y_CLIP {
+        public static int fb_y_clip_max(int n) {
+            return (n & 1023) << 16;
+        }
+        public static int fb_y_clip_min(int n) {
+            return (n & 1023) << 0;
+        }
+    }
+    public class FPU_SHAD_SCALE {
+        public class simple_shadow_enable {
+            public static int parameter_selection_volume_mode(int n) {
+                return (n >> 8) & 1;
+            }
+            public static final int intensity_volume_mode = 256;
+        }
+        public static int scale_factor_for_shadows(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class FPU_CULL_VAL {
+        public static int culling_comparison_value(int n) {
+            return (n & 2147483647) << 0;
+        }
+    }
+    public class FPU_PARAM_CFG {
+        public class region_header_type {
+            public static int type_1(int n) {
+                return (n >> 21) & 1;
+            }
+            public static final int type_2 = 2097152;
+        }
+        public static int tsp_parameter_burst_threshold(int n) {
+            return (n & 63) << 14;
+        }
+        public static int isp_parameter_burst_threshold(int n) {
+            return (n & 63) << 8;
+        }
+        public static int pointer_burst_size(int n) {
+            return (n & 15) << 4;
+        }
+        public static int pointer_first_burst_size(int n) {
+            return (n & 15) << 0;
+        }
+    }
+    public class HALF_OFFSET {
+        public class tsp_texel_sampling_position {
+            public static final int top_left = 4;
+            public static final int center = 4;
+        }
+        public class tsp_pixel_sampling_position {
+            public static final int top_left = 2;
+            public static final int center = 2;
+        }
+        public class fpu_pixel_sampling_position {
+            public static final int top_left = 1;
+            public static final int center = 1;
+        }
+    }
+    public class FPU_PERP_VAL {
+        public static int perpendicular_triangle_compare(int n) {
+            return (n & 2147483647) << 0;
+        }
+    }
+    public class ISP_BACKGND_D {
+        public static int background_plane_depth(int n) {
+            return (n & 268435455) << 4;
+        }
+    }
+    public class ISP_BACKGND_T {
+        public static final int cache_bypass = 268435456;
+        public static final int shadow = 134217728;
+        public static int skip(int n) {
+            return (n & 7) << 24;
+        }
+        public static int tag_address(int n) {
+            return (n & 2097151) << 3;
+        }
+        public static int tag_offset(int n) {
+            return (n & 7) << 0;
+        }
+    }
+    public class ISP_FEED_CFG {
+        public static int cache_size_for_translucency(int n) {
+            return (n & 1023) << 14;
+        }
+        public static int punch_through_chunk_size(int n) {
+            return (n & 1023) << 4;
+        }
+        public static final int discard_mode = 8;
+        public static final int pre_sort_mode = 1;
+    }
+    public class SDRAM_REFRESH {
+        public static int refresh_counter_value(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class SDRAM_ARB_CFG {
+        public class override_value {
+            public static int priority_only(int n) {
+                return (n >> 18) & 15;
+            }
+            public static final int rendered_data = 262144;
+            public static final int texture_vq_index = 524288;
+            public static final int texture_normal_data_and_vq_codebook = 786432;
+            public static final int tile_accelerator_isp_tsp_data = 1048576;
+            public static final int tile_accelerator_pointers = 1310720;
+            public static final int sh4 = 1572864;
+            public static final int tsp_parameters = 1835008;
+            public static final int tsp_region_data = 2097152;
+            public static final int isp_pointer_data = 2359296;
+            public static final int isp_parameters = 2621440;
+            public static final int crt_controller = 2883584;
+        }
+        public class arbiter_priority_control {
+            public static int priority_arbitration_only(int n) {
+                return (n >> 16) & 3;
+            }
+            public static final int override_value_field = 65536;
+            public static final int round_robin_counter = 131072;
+        }
+        public static int arbiter_crt_page_break_latency_count_value(int n) {
+            return (n & 255) << 8;
+        }
+        public static int arbiter_page_break_latency_count_value(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class SDRAM_CFG {
+        public static int read_command_to_returned_data_delay(int n) {
+            return (n & 7) << 26;
+        }
+        public static int cas_latency_value(int n) {
+            return (n & 7) << 23;
+        }
+        public static int activate_to_activate_period(int n) {
+            return (n & 3) << 21;
+        }
+        public static int read_to_write_period(int n) {
+            return (n & 7) << 18;
+        }
+        public static int refresh_to_activate_period(int n) {
+            return (n & 15) << 14;
+        }
+        public static int pre_charge_to_activate_period(int n) {
+            return (n & 3) << 10;
+        }
+        public static int activate_to_pre_charge_period(int n) {
+            return (n & 15) << 6;
+        }
+        public static int activate_to_read_write_command_period(int n) {
+            return (n & 3) << 4;
+        }
+        public static int write_to_pre_charge_period(int n) {
+            return (n & 3) << 2;
+        }
+        public static int read_to_pre_charge_period(int n) {
+            return (n & 3) << 0;
+        }
+    }
+    public class FOG_COL_RAM {
+        public static int red(int n) {
+            return (n & 255) << 16;
+        }
+        public static int green(int n) {
+            return (n & 255) << 8;
+        }
+        public static int blue(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class FOG_COL_VERT {
+        public static int red(int n) {
+            return (n & 255) << 16;
+        }
+        public static int green(int n) {
+            return (n & 255) << 8;
+        }
+        public static int blue(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class FOG_DENSITY {
+        public static int fog_scale_mantissa(int n) {
+            return (n & 255) << 8;
+        }
+        public static int fog_scale_exponent(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class FOG_CLAMP_MAX {
+        public static int alpha(int n) {
+            return (n & 255) << 24;
+        }
+        public static int red(int n) {
+            return (n & 255) << 16;
+        }
+        public static int green(int n) {
+            return (n & 255) << 8;
+        }
+        public static int blue(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class FOG_CLAMP_MIN {
+        public static int alpha(int n) {
+            return (n & 255) << 24;
+        }
+        public static int red(int n) {
+            return (n & 255) << 16;
+        }
+        public static int green(int n) {
+            return (n & 255) << 8;
+        }
+        public static int blue(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class SPG_TRIGGER_POS {
+        public static int trigger_v_count(int n) {
+            return (n >> 16) & 1023;
+        }
+        public static int trigger_h_count(int n) {
+            return (n >> 0) & 1023;
+        }
+    }
+    public class SPG_HBLANK_INT {
+        public static int hblank_in_interrupt(int n) {
+            return (n >> 16) & 1023;
+        }
+        public static int line_comp_val(int n) {
+            return (n & 1023) << 0;
+        }
+        public class hblank_int_mode {
+            public static int output_equal_line_comp_val(int n) {
+                return (n >> 12) & 3;
+            }
+            public static final int output_every_line_comp_val = 4096;
+            public static final int output_every_line = 8192;
+        }
+    }
+    public class SPG_VBLANK_INT {
+        public static int vblank_out_interrupt_line_number(int n) {
+            return (n & 1023) << 16;
+        }
+        public static int vblank_in_interrupt_line_number(int n) {
+            return (n & 1023) << 0;
+        }
+    }
+    public class SPG_CONTROL {
+        public class csync_on_h {
+            public static int hsync(int n) {
+                return (n >> 9) & 1;
+            }
+            public static final int csync = 512;
+        }
+        public class sync_direction {
+            public static int input(int n) {
+                return (n >> 8) & 1;
+            }
+            public static final int output = 256;
+        }
+        public static final int pal = 128;
+        public static final int ntsc = 64;
+        public static final int force_field2 = 32;
+        public static final int interlace = 16;
+        public static final int spg_lock = 8;
+        public class mcsync_pol {
+            public static int active_low(int n) {
+                return (n >> 2) & 1;
+            }
+            public static final int active_high = 4;
+        }
+        public class mvsync_pol {
+            public static int active_low(int n) {
+                return (n >> 1) & 1;
+            }
+            public static final int active_high = 2;
+        }
+        public class mhsync_pol {
+            public static int active_low(int n) {
+                return (n >> 0) & 1;
+            }
+            public static final int active_high = 1;
+        }
+    }
+    public class SPG_HBLANK {
+        public static int hbend(int n) {
+            return (n & 1023) << 16;
+        }
+        public static int hbstart(int n) {
+            return (n & 1023) << 0;
+        }
+    }
+    public class SPG_LOAD {
+        public static int vcount(int n) {
+            return (n & 1023) << 16;
+        }
+        public static int hcount(int n) {
+            return (n & 1023) << 0;
+        }
+    }
+    public class SPG_VBLANK {
+        public static int vbend(int n) {
+            return (n & 1023) << 16;
+        }
+        public static int vbstart(int n) {
+            return (n & 1023) << 0;
+        }
+    }
+    public class SPG_WIDTH {
+        public static int eqwidth(int n) {
+            return (n & 1023) << 22;
+        }
+        public static int bpwidth(int n) {
+            return (n & 1023) << 12;
+        }
+        public static int vswidth(int n) {
+            return (n & 15) << 8;
+        }
+        public static int hswidth(int n) {
+            return (n & 127) << 0;
+        }
+    }
+    public class TEXT_CONTROL {
+        public class code_book_endian {
+            public static int little_endian(int n) {
+                return (n >> 17) & 1;
+            }
+            public static final int big_endian = 131072;
+        }
+        public class index_endian {
+            public static int little_endian(int n) {
+                return (n >> 16) & 1;
+            }
+            public static final int big_endian = 65536;
+        }
+        public static int bank_bit(int n) {
+            return (n & 31) << 8;
+        }
+        public static int stride(int n) {
+            return (n & 31) << 0;
+        }
+    }
+    public class VO_CONTROL {
+        public static final int pclk_delay_reset = 2097152;
+        public static int pclk_delay(int n) {
+            return (n & 31) << 16;
+        }
+        public static final int pixel_double = 256;
+        public static final int blank_video = 8;
+        public class field_mode {
+            public static int use_field_flag_from_spg(int n) {
+                return (n >> 4) & 15;
+            }
+            public static final int use_inverse_of_field_flag_from_spg = 16;
+            public static final int field_1_fixed = 32;
+            public static final int field_2_fixed = 48;
+            public static final int field_1_when_the_active_edges_of_hsync_and_vsync_match = 64;
+            public static final int field_2_when_the_active_edges_of_hsync_and_vsync_match = 80;
+            public static final int field_1_when_hsync_becomes_active_in_the_middle_of_the_vsync_active_edge = 96;
+            public static final int field_2_when_hsync_becomes_active_in_the_middle_of_the_vsync_active_edge = 112;
+            public static final int inverted_at_the_active_edge_of_vsync = 128;
+        }
+        public class blank_pol {
+            public static int active_low(int n) {
+                return (n >> 2) & 1;
+            }
+            public static final int active_high = 4;
+        }
+        public class vsync_pol {
+            public static int active_low(int n) {
+                return (n >> 1) & 1;
+            }
+            public static final int active_high = 2;
+        }
+        public class hsync_pol {
+            public static int active_low(int n) {
+                return (n >> 0) & 1;
+            }
+            public static final int active_high = 1;
+        }
+    }
+    public class VO_STARTX {
+        public static int horizontal_start_position(int n) {
+            return (n & 1023) << 0;
+        }
+    }
+    public class VO_STARTY {
+        public static int vertical_start_position_on_field_2(int n) {
+            return (n & 1023) << 16;
+        }
+        public static int vertical_start_position_on_field_1(int n) {
+            return (n & 1023) << 0;
+        }
+    }
+    public class SCALER_CTL {
+        public class field_select {
+            public static int field_1(int n) {
+                return (n >> 18) & 1;
+            }
+            public static final int field_2 = 262144;
+        }
+        public static final int interlace = 131072;
+        public static final int horizontal_scaling_enable = 65536;
+        public static int vertical_scale_factor(int n) {
+            return (n & 65535) << 0;
+        }
+    }
+    public class PAL_RAM_CTRL {
+        public class pixel_format {
+            public static int argb1555(int n) {
+                return (n >> 0) & 3;
+            }
+            public static final int rgb565 = 1;
+            public static final int argb4444 = 2;
+            public static final int argb8888 = 3;
+        }
+    }
+    public class SPG_STATUS {
+        public static int vsync(int n) {
+            return (n >> 13) & 1;
+        }
+        public static int hsync(int n) {
+            return (n >> 12) & 1;
+        }
+        public static int blank(int n) {
+            return (n >> 11) & 1;
+        }
+        public static int fieldnum(int n) {
+            return (n >> 10) & 1;
+        }
+        public static int scanline(int n) {
+            return (n >> 0) & 1023;
+        }
+    }
+    public class FB_BURSTCTRL {
+        public static int wr_burst(int n) {
+            return (n & 15) << 16;
+        }
+        public static int vid_lat(int n) {
+            return (n & 127) << 8;
+        }
+        public static int vid_burst(int n) {
+            return (n & 63) << 0;
+        }
+    }
+    public class FB_C_SOF {
+        public static int frame_buffer_current_read_address(int n) {
+            return (n >> 0) & 16777215;
+        }
+    }
+    public class Y_COEFF {
+        public static int coefficient_1(int n) {
+            return (n & 255) << 8;
+        }
+        public static int coefficient_0_2(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class PT_ALPHA_REF {
+        public static int alpha_reference_for_punch_through(int n) {
+            return (n & 255) << 0;
+        }
+    }
+    public class FOG_TABLE {
+        public static int fog_table_data(int n) {
+            return (n & 65535) << 0;
+        }
+    }
+    public class PALETTE_RAM {
+        public static int palette_data(int n) {
+            return (n & -1) << 0;
+        }
+    }
+}