From 327e57a520280822c2b6ab52a16da4c41996298d Mon Sep 17 00:00:00 2001
From: Zack Buhman <zack@buhman.org>
Date: Wed, 11 Oct 2023 18:49:58 +0000
Subject: [PATCH] initial cd image build system

---
 .gitignore      |  11 +-
 ABSTRACT.TXT    |   1 +
 BIBLIOGR.TXT    |   1 +
 COPYRIGH.TXT    |   1 +
 Makefile        |   1 +
 common.mk       | 112 +++++++++++++++++++++
 ip.lds          |  56 +++++++++++
 main.c          |  53 ++++++++++
 main.lds        |  53 ++++++++++
 scramble.c      | 259 ++++++++++++++++++++++++++++++++++++++++++++++++
 sg/aip.obj      | Bin 0 -> 8779 bytes
 sg/sg_are00.obj | Bin 0 -> 624 bytes
 sg/sg_are01.obj | Bin 0 -> 624 bytes
 sg/sg_are02.obj | Bin 0 -> 624 bytes
 sg/sg_are03.obj | Bin 0 -> 624 bytes
 sg/sg_are04.obj | Bin 0 -> 624 bytes
 sg/sg_are05.obj | Bin 0 -> 624 bytes
 sg/sg_are06.obj | Bin 0 -> 624 bytes
 sg/sg_areec.obj | Bin 0 -> 624 bytes
 sg/sg_arejp.obj | Bin 0 -> 624 bytes
 sg/sg_areus.obj | Bin 0 -> 624 bytes
 sg/sg_ini.obj   | Bin 0 -> 10857 bytes
 sg/sg_sec.obj   | Bin 0 -> 13925 bytes
 sg/strt2.obj    | Bin 0 -> 1812 bytes
 sg/zero.obj     | Bin 0 -> 588 bytes
 systemid.s      |  52 ++++++++++
 toc.s           |   4 +
 27 files changed, 603 insertions(+), 1 deletion(-)
 create mode 100644 ABSTRACT.TXT
 create mode 100644 BIBLIOGR.TXT
 create mode 100644 COPYRIGH.TXT
 create mode 100644 Makefile
 create mode 100644 common.mk
 create mode 100644 ip.lds
 create mode 100644 main.c
 create mode 100644 main.lds
 create mode 100644 scramble.c
 create mode 100644 sg/aip.obj
 create mode 100644 sg/sg_are00.obj
 create mode 100644 sg/sg_are01.obj
 create mode 100644 sg/sg_are02.obj
 create mode 100644 sg/sg_are03.obj
 create mode 100644 sg/sg_are04.obj
 create mode 100644 sg/sg_are05.obj
 create mode 100644 sg/sg_are06.obj
 create mode 100644 sg/sg_areec.obj
 create mode 100644 sg/sg_arejp.obj
 create mode 100644 sg/sg_areus.obj
 create mode 100644 sg/sg_ini.obj
 create mode 100644 sg/sg_sec.obj
 create mode 100644 sg/strt2.obj
 create mode 100644 sg/zero.obj
 create mode 100644 systemid.s
 create mode 100644 toc.s

diff --git a/.gitignore b/.gitignore
index a1e7a31..762b381 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,12 @@
 *.pyc
 __pycache__
-.~*
\ No newline at end of file
+.~*
+*.BIN
+*.bin
+*.elf
+*.d
+*.iso
+*.cdi
+*.o
+scramble
+cdi4dc
\ No newline at end of file
diff --git a/ABSTRACT.TXT b/ABSTRACT.TXT
new file mode 100644
index 0000000..af14975
--- /dev/null
+++ b/ABSTRACT.TXT
@@ -0,0 +1 @@
+abstract
diff --git a/BIBLIOGR.TXT b/BIBLIOGR.TXT
new file mode 100644
index 0000000..d8dfacf
--- /dev/null
+++ b/BIBLIOGR.TXT
@@ -0,0 +1 @@
+bibliography
diff --git a/COPYRIGH.TXT b/COPYRIGH.TXT
new file mode 100644
index 0000000..73129b4
--- /dev/null
+++ b/COPYRIGH.TXT
@@ -0,0 +1 @@
+Copyright(c) SEGA ENTERPRISES, LTD. 1998
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..31ea6a8
--- /dev/null
+++ b/Makefile
@@ -0,0 +1 @@
+include common.mk
diff --git a/common.mk b/common.mk
new file mode 100644
index 0000000..c8a9a72
--- /dev/null
+++ b/common.mk
@@ -0,0 +1,112 @@
+LIB ?= .
+OPT ?= -Og
+DEBUG ?= -g -gdwarf-4
+GENERATED ?=
+
+AARCH = --isa=sh4 --little
+AFLAGS = --fatal-warnings
+
+CARCH = -m4-single-only -ml
+CFLAGS += -falign-functions=4 -ffunction-sections -fdata-sections -fshort-enums -ffreestanding -nostdlib
+CFLAGS += -Wall -Werror -Wfatal-errors -Wno-error=unused-variable
+DEPFLAGS = -MMD -E
+# --print-gc-sections
+LDFLAGS = --gc-sections --no-warn-rwx-segment --print-memory-usage --entry=_start --orphan-handling=error
+CXXFLAGS = -std=c++20 -fno-exceptions -fno-non-call-exceptions -fno-rtti -fno-threadsafe-statics
+
+TARGET = sh4-none-elf-
+CC = $(TARGET)gcc
+CXX = $(TARGET)g++
+AS = $(TARGET)as
+LD = $(TARGET)ld
+OBJCOPY = $(TARGET)objcopy
+OBJDUMP = $(TARGET)objdump
+
+IP_OBJ = \
+	systemid.o \
+	toc.o \
+	sg/sg_sec.o \
+	sg/sg_arejp.o \
+	sg/sg_areus.o \
+	sg/sg_areec.o \
+	sg/sg_are00.o \
+	sg/sg_are01.o \
+	sg/sg_are02.o \
+	sg/sg_are03.o \
+	sg/sg_are04.o \
+	sg/sg_ini.o \
+	sg/aip.o
+
+all: main.elf
+
+%.o: %.obj
+	$(OBJCOPY) -g \
+		--rename-section IP=.text.$* \
+		$< $@
+
+%.o: %.s
+	$(AS) $(AARCH) $(AFLAGS) $(DEBUG) $< -o $@
+
+%.c.d: | $(GENERATED)
+	$(CC) $(CARCH) $(CFLAGS) $(OPT) $(DEBUG) $(DEPFLAGS) -c $(basename $@) -MF $@ -o /dev/null
+
+%.o: %.c %.c.d
+	$(CC) $(CARCH) $(CFLAGS) $(OPT) $(DEBUG) -c $< -o $@
+
+main.elf: main.o
+	$(LD) $(LDFLAGS) -T $(LIB)/main.lds $^ -o $@
+
+%.bin: %.elf
+	$(OBJCOPY) -O binary $< $@
+
+ip.elf: $(IP_OBJ)
+	$(LD) --print-memory-usage -T $(LIB)/ip.lds $^ -o $@
+
+audio.pcm:
+	sox \
+		--rate 44100 \
+		--encoding signed-integer \
+		--bits 16 \
+		--channels 2 \
+		--endian little \
+		--null \
+		$@.raw \
+		synth 1 sin 440 vol -10dB
+	mv $@.raw $@
+
+1ST_READ.BIN: main.bin
+	./scramble main.bin 1ST_READ.BIN
+
+%.iso: 1ST_READ.BIN ip.bin
+	mkisofs \
+		-C 0,11702 \
+		-sysid     "SEGA SEGAKATANA" \
+		-volid     "SAMPLE_GAME_TITLE" \
+		-volset    "SAMPLE_GAME_TITLE" \
+		-publisher "SEGA ENTERPRISES, LTD." \
+		-preparer  "CRI CD CRAFT VER.2.27" \
+		-copyright "COPYRIGH.TXT" \
+		-abstract  "ABSTRACT.TXT" \
+		-biblio    "BIBLIOGR.TXT" \
+		-sectype data \
+		-G ip.bin \
+		-o $@ \
+		-graft-points \
+		/=./1ST_READ.BIN \
+		/=./COPYRIGH.TXT \
+		/=./ABSTRACT.TXT \
+		/=./BIBLIOGR.TXT
+
+%.cdi: %.iso
+	./cdi4dc $< $@ >/dev/null
+
+.SUFFIXES:
+.INTERMEDIATE:
+.SECONDARY:
+.PHONY: all clean
+
+%: RCS/%,v
+%: RCS/%
+%: %,v
+%: s.%
+%: SCCS/s.%
diff --git a/ip.lds b/ip.lds
new file mode 100644
index 0000000..e3803a4
--- /dev/null
+++ b/ip.lds
@@ -0,0 +1,56 @@
+OUTPUT_FORMAT("elf32-shl", "elf32-shl", "elf32-shl")
+
+MEMORY
+{
+  systemid (arx) : ORIGIN = 0x8c008000, LENGTH = 0x100
+  toc      (arx) : ORIGIN = 0x8c008100, LENGTH = 0x200
+  sg_sec   (arx) : ORIGIN = 0x8c008300, LENGTH = 0x3400
+  sg_are   (arx) : ORIGIN = 0x8c00b700, LENGTH = 0x100
+  sg_ini   (arx) : ORIGIN = 0x8c00b800, LENGTH = 0x2800
+  aip      (arx) : ORIGIN = 0x8c00e000, LENGTH = 0x2000
+}
+
+SECTIONS
+{
+  .text.systemid :
+  {
+    KEEP(*(.text.systemid))
+  } > systemid
+
+  .text.toc :
+  {
+    KEEP(*(.text.toc))
+  } > toc
+
+  .text.sg_sec :
+  {
+    KEEP(*(.text.sg_sec))
+  } > sg_sec
+
+  .text.sg_are :
+  {
+    KEEP(*(.text.sg_arejp))
+    KEEP(*(.text.sg_areus))
+    KEEP(*(.text.sg_areec))
+    KEEP(*(.text.sg_are00))
+    KEEP(*(.text.sg_are01))
+    KEEP(*(.text.sg_are02))
+    KEEP(*(.text.sg_are03))
+    KEEP(*(.text.sg_are04))
+  } > sg_are
+
+  .text.sg_ini :
+  {
+    KEEP(*(.text.sg_ini))
+  } > sg_ini
+
+  .text.aip :
+  {
+    KEEP(*(.text.aip))
+  } > aip
+
+  /DISCARD/ :
+  {
+    *(*)
+  }
+}
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..4a44c65
--- /dev/null
+++ b/main.c
@@ -0,0 +1,53 @@
+#include <stdint.h>
+
+volatile uint8_t * SCFTDR2 = (volatile uint8_t *)0xFFE8000C;
+
+volatile uint32_t * SOFT_RESET  = (volatile uint32_t *)0xa05f8008;
+volatile uint32_t * STARTRENDER = (volatile uint32_t *)0xa05f8014;
+volatile uint32_t * VO_CONTROL = (volatile uint32_t *)0xa05f80e8;
+volatile uint32_t * VO_BORDER_COL = (volatile uint32_t *)0xa05f8040;
+
+volatile uint32_t * FB_R_SOF1 = (volatile uint32_t *)0xa05f8050;
+
+volatile uint32_t * RAM = (volatile uint32_t *)0xa5000000;
+
+volatile uint32_t * SPG_STATUS = (volatile uint32_t *)0xa05f810;
+
+void start()
+{
+  *SCFTDR2 = 'H';
+  *SCFTDR2 = 'e';
+  *SCFTDR2 = 'l';
+  *SCFTDR2 = 'l';
+  *SCFTDR2 = '3';
+
+  *SOFT_RESET = 0b111;
+  *SOFT_RESET = 0b000;
+
+  *VO_CONTROL |= 1 << 3;
+  *VO_BORDER_COL = 31;
+
+  for (int i = 0; i < (2*1024*1024 + 1024 * 2 + 512 + 4) / 4; i++) {
+    RAM[i] = 0x1;
+  }
+
+  while (1) {
+  }
+}
+
+/*
+    {
+        DM_640x480,
+        640, 480,
+	VID_INTERLACE, // flags
+        CT_VGA, // cable type
+        0, // pixel mode
+        0x20C, 0x359, // scanlines, clocks per scanline
+        0xAC, 0x28,   // bitmap x, bitmap y
+        0x15, 0x104,  // first scanline interrupt, second scanline interrupt
+        0x7E, 0x345,  // border x start, border x stop
+        0x24, 0x204,  // border y start, border y stop
+        0, 1,         // current framebuffer, number of framebuffers
+        { 0, 0, 0, 0 } // offset to framebuffers
+    },
+*/
diff --git a/main.lds b/main.lds
new file mode 100644
index 0000000..17bce10
--- /dev/null
+++ b/main.lds
@@ -0,0 +1,53 @@
+OUTPUT_FORMAT("elf32-shl", "elf32-shl", "elf32-shl")
+MEMORY
+{
+  ram : ORIGIN = 0x8c010000, LENGTH = 1M
+}
+SECTIONS
+{
+  . = 0x8c010000;
+
+  .text ALIGN(4) : SUBALIGN(4)
+  {
+    KEEP(*(.text.start))
+    *(.text)
+    *(.text.*)
+  } > ram
+
+  .data ALIGN(4) : SUBALIGN(4)
+  {
+    *(.data)
+    *(.data.*)
+  } > ram
+
+  .rodata ALIGN(4) : SUBALIGN(4)
+  {
+    *(.rodata)
+    *(.rodata.*)
+  } > ram
+
+  .ctors ALIGN(4) : SUBALIGN(4)
+  {
+    KEEP(*(.ctors))
+    KEEP(*(.ctors.*))
+  } > ram
+
+  .bss ALIGN(4) (NOLOAD) : SUBALIGN(4)
+  {
+    *(.bss)
+    *(.bss.*)
+  } > ram
+
+  /DISCARD/ :
+  {
+    *(.debug*)
+    *(.comment*)
+    *(.rela*)
+  }
+
+  __bss_link_start = ADDR(.bss);
+  __bss_link_end = ADDR(.bss) + SIZEOF(.bss);
+
+  __ctors_link_start = ADDR(.ctors);
+  __ctors_link_end = ADDR(.ctors) + SIZEOF(.ctors);
+}
diff --git a/scramble.c b/scramble.c
new file mode 100644
index 0000000..56069b1
--- /dev/null
+++ b/scramble.c
@@ -0,0 +1,259 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#define MAXCHUNK (2048*1024)
+
+static unsigned int seed;
+
+void my_srand(unsigned int n)
+{
+  seed = n & 0xffff;
+}
+
+unsigned int my_rand()
+{
+  seed = (seed * 2109 + 9273) & 0x7fff;
+  return (seed + 0xc000) & 0xffff;
+}
+
+void load(FILE *fh, unsigned char *ptr, unsigned long sz)
+{
+  if(fread(ptr, 1, sz, fh) != sz)
+    {
+      fprintf(stderr, "Read error!\n");
+      exit(1);
+    }
+}
+
+void load_chunk(FILE *fh, unsigned char *ptr, unsigned long sz)
+{
+  static int idx[MAXCHUNK/32];
+  int i;
+
+  /* Convert chunk size to number of slices */
+  sz /= 32;
+
+  /* Initialize index table with unity,
+     so that each slice gets loaded exactly once */
+  for(i = 0; i < sz; i++)
+    idx[i] = i;
+
+  for(i = sz-1; i >= 0; --i)
+    {
+      /* Select a replacement index */
+      int x = (my_rand() * i) >> 16;
+
+      /* Swap */
+      int tmp = idx[i];
+      idx[i] = idx[x];
+      idx[x] = tmp;
+
+      /* Load resulting slice */
+      load(fh, ptr+32*idx[i], 32);
+    }
+}
+
+void load_file(FILE *fh, unsigned char *ptr, unsigned long filesz)
+{
+  unsigned long chunksz;
+
+  my_srand(filesz);
+
+  /* Descramble 2 meg blocks for as long as possible, then
+     gradually reduce the window down to 32 bytes (1 slice) */
+  for(chunksz = MAXCHUNK; chunksz >= 32; chunksz >>= 1)
+    while(filesz >= chunksz)
+      {
+	load_chunk(fh, ptr, chunksz);
+	filesz -= chunksz;
+	ptr += chunksz;
+      }
+
+  /* Load final incomplete slice */
+  if(filesz)
+    load(fh, ptr, filesz);
+}
+
+void read_file(char *filename, unsigned char **ptr, unsigned long *sz)
+{
+  FILE *fh = fopen(filename, "rb");
+  if(fh == NULL)
+    {
+      fprintf(stderr, "Can't open \"%s\".\n", filename);
+      exit(1);
+    }
+  if(fseek(fh, 0, SEEK_END)<0)
+    {
+      fprintf(stderr, "Seek error.\n");
+      exit(1);
+    }
+  *sz = ftell(fh);
+  *ptr = malloc(*sz);
+  if( *ptr == NULL )
+    {
+      fprintf(stderr, "Out of memory.\n");
+      exit(1);
+    }
+  if(fseek(fh, 0, SEEK_SET)<0)
+    {
+      fprintf(stderr, "Seek error.\n");
+      exit(1);
+    }
+  load_file(fh, *ptr, *sz);
+  fclose(fh);
+}
+
+void save(FILE *fh, unsigned char *ptr, unsigned long sz)
+{
+  if(fwrite(ptr, 1, sz, fh) != sz)
+    {
+      fprintf(stderr, "Write error!\n");
+      exit(1);
+    }
+}
+
+void save_chunk(FILE *fh, unsigned char *ptr, unsigned long sz)
+{
+  static int idx[MAXCHUNK/32];
+  int i;
+
+  /* Convert chunk size to number of slices */
+  sz /= 32;
+
+  /* Initialize index table with unity,
+     so that each slice gets saved exactly once */
+  for(i = 0; i < sz; i++)
+    idx[i] = i;
+
+  for(i = sz-1; i >= 0; --i)
+    {
+      /* Select a replacement index */
+      int x = (my_rand() * i) >> 16;
+
+      /* Swap */
+      int tmp = idx[i];
+      idx[i] = idx[x];
+      idx[x] = tmp;
+
+      /* Save resulting slice */
+      save(fh, ptr+32*idx[i], 32);
+    }
+}
+
+void save_file(FILE *fh, unsigned char *ptr, unsigned long filesz)
+{
+  unsigned long chunksz;
+
+  my_srand(filesz);
+
+  /* Descramble 2 meg blocks for as long as possible, then
+     gradually reduce the window down to 32 bytes (1 slice) */
+  for(chunksz = MAXCHUNK; chunksz >= 32; chunksz >>= 1)
+    while(filesz >= chunksz)
+      {
+	save_chunk(fh, ptr, chunksz);
+	filesz -= chunksz;
+	ptr += chunksz;
+      }
+
+  /* Save final incomplete slice */
+  if(filesz)
+    save(fh, ptr, filesz);
+}
+
+void write_file(char *filename, unsigned char *ptr, unsigned long sz)
+{
+  FILE *fh = fopen(filename, "wb");
+  if(fh == NULL)
+    {
+      fprintf(stderr, "Can't open \"%s\".\n", filename);
+      exit(1);
+    }
+  save_file(fh, ptr, sz);
+  fclose(fh);
+}
+
+void descramble(char *src, char *dst)
+{
+  unsigned char *ptr = NULL;
+  unsigned long sz = 0;
+  FILE *fh;
+
+  read_file(src, &ptr, &sz);
+
+  fh = fopen(dst, "wb");
+  if(fh == NULL)
+    {
+      fprintf(stderr, "Can't open \"%s\".\n", dst);
+      exit(1);
+    }
+  if( fwrite(ptr, 1, sz, fh) != sz )
+    {
+      fprintf(stderr, "Write error.\n");
+      exit(1);
+    }
+  fclose(fh);
+  free(ptr);
+}
+
+void scramble(char *src, char *dst)
+{
+  unsigned char *ptr = NULL;
+  unsigned long sz = 0;
+  FILE *fh;
+
+  fh = fopen(src, "rb");
+  if(fh == NULL)
+    {
+      fprintf(stderr, "Can't open \"%s\".\n", src);
+      exit(1);
+    }
+  if(fseek(fh, 0, SEEK_END)<0)
+    {
+      fprintf(stderr, "Seek error.\n");
+      exit(1);
+    }
+  sz = ftell(fh);
+  ptr = malloc(sz);
+  if( ptr == NULL )
+    {
+      fprintf(stderr, "Out of memory.\n");
+      exit(1);
+    }
+  if(fseek(fh, 0, SEEK_SET)<0)
+    {
+      fprintf(stderr, "Seek error.\n");
+      exit(1);
+    }
+  if( fread(ptr, 1, sz, fh) != sz )
+    {
+      fprintf(stderr, "Read error.\n");
+      exit(1);
+    }
+  fclose(fh);
+
+  write_file(dst, ptr, sz);
+
+  free(ptr);
+}
+
+int main(int argc, char *argv[])
+{
+  int opt = 0;
+
+  if(argc > 1 && !strcmp(argv[1], "-d"))
+    opt ++;
+
+  if(argc != 3+opt)
+    {
+      fprintf(stderr, "Usage: %s [-d] from to\n", argv[0]);
+      exit(1);
+    }
+  
+  if(opt)
+    descramble(argv[2], argv[3]);
+  else
+    scramble(argv[1], argv[2]);
+
+  return 0;
+}
diff --git a/sg/aip.obj b/sg/aip.obj
new file mode 100644
index 0000000000000000000000000000000000000000..b3b37cf34b1fd084a1adf5fc8d5b94ec8086375a
GIT binary patch
literal 8779
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z2`~XBzyz286JP>NfC(@GCcp%k025#WOn?b60Vco%m;e*_uLQhF_vHk<PB;m{YmLXS
z(EzW#GZ=KY(LLTAPezllg|}A&eQNt(d!+dT+L`!)o;^5wt;YfY>{ur+&|SiK7WYNE
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y+{t|R3z`AC=gZ_XwmFmj6#Udv7;#XZ`w8Vwc0zWtBH4z5P9Px-5cY;%8~y?<Hg=!@

literal 0
HcmV?d00001

diff --git a/sg/sg_are00.obj b/sg/sg_are00.obj
new file mode 100644
index 0000000000000000000000000000000000000000..9def46ab0ab0bf549ca82c1e03b09dd9548dcfde
GIT binary patch
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diff --git a/sg/strt2.obj b/sg/strt2.obj
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diff --git a/sg/zero.obj b/sg/zero.obj
new file mode 100644
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GIT binary patch
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diff --git a/systemid.s b/systemid.s
new file mode 100644
index 0000000..b8dc97c
--- /dev/null
+++ b/systemid.s
@@ -0,0 +1,52 @@
+	/*
+<A><-------B------> <C->
+
+1100 0000 0000 0000 1000 0001 0000
+
+0000 0000 0000 0000 0000 0000 0000
+^^^^ ^^^^ ^^^^ ^^^^ ^^^^    ^    ^
+|||| |||| |||| |||| ||||    |    |
+|||| |||| |||| |||| ||||    |    +----- Uses Windows CE
+|||| |||| |||| |||| ||||    |
+|||| |||| |||| |||| ||||    +-----  VGA box support
+|||| |||| |||| |||| ||||
+|||| |||| |||| |||| |||+----- Other expansions
+|||| |||| |||| |||| ||+----- Puru Puru pack
+|||| |||| |||| |||| |+----- Mike device
+|||| |||| |||| |||| +----- Memory card
+|||| |||| |||| |||+------ Start + A + B + Directions
+|||| |||| |||| ||+------ C button
+|||| |||| |||| |+------ D button
+|||| |||| |||| +------ X button
+|||| |||| |||+------- Y button
+|||| |||| ||+------- Z button
+|||| |||| |+------- Expanded direction buttons
+|||| |||| +------- Analog R trigger
+|||| |||+-------- Analog L trigger
+|||| ||+-------- Analog horizontal controller
+|||| |+-------- Analog vertical controller
+|||| +-------- Expanded analog horizontal
+|||+--------- Expanded analog vertical
+||+--------- Gun
+|+--------- Keyboard
++--------- Mouse
+	*/
+
+	.section .text.systemid
+
+	.ascii "SEGA SEGAKATANA " /* H/W identifier */
+	.ascii "SEGA ENTERPRISES" /* H/W Vendor ID */
+	.ascii "39F1 "            /* Media ID */
+	.ascii      "GD-ROM1/1  " /* Media information */
+	.ascii "JUE     "         /* Compatible Area Symbol */
+	.ascii         "C000810	" /* Compatible peripherals */
+	.ascii "HDR-0900  "       /* Product number */
+	.ascii           "V0.000" /* Version number */
+	.ascii "19980901"         /* Release date */
+	.ascii         "        " /* Reserved */
+	.ascii "1ST_READ.BIN"
+	.ascii             "    " /* Reserved */
+	.ascii "SEGA LC-KAISYAID" /* Maker identifier */
+	.ascii "SAMPLE GAME     " /* Game title */
+	.fill  (96-16),1,0x20     /* Game title */
+	.fill  32,1,0x20          /* Reserved */
diff --git a/toc.s b/toc.s
new file mode 100644
index 0000000..06e8c0e
--- /dev/null
+++ b/toc.s
@@ -0,0 +1,4 @@
+	.section .text.toc
+
+	.fill (101*4),1,0xff
+	.fill (27 *4),1,0x00