warmup

.gitignore

@@ -1,2 +1,3 @@
 toolchain/pcsx-redux
+# toolchain/armips
 build

code/warmup/exercise1.s

@@ -0,0 +1,56 @@
+.psx
+.create "exercise1.bin", 0x80010000
+
+; Entry Point of Code
+.org 0x80010000
+
+; Constant declaration
+BASE_ADDR equ 0x0000
+
+
+; Symbol Alias Table
+
+; Instructions
+load_imm equ li
+
+; Registers
+rtemp_0 equ $t0
+rtemp_1 equ $t1
+rtemp_2 equ $t2
+
+.macro test,dst_reg,value
+	li dst_reg,value
+.endmacro
+
+.macro test2,reg
+	li reg,0xA000
+.endmacro
+
+.macro myli,dest,value
+   .if value & ~0xFFFF
+      ori   dest,r0,value
+   .elseif (value & 0xFFFF8000) == 0xFFFF8000
+      addiu dest,r0,value & 0xFFFF
+   .elseif (value & 0xFFFF) == 0
+      lui   dest,value >> 16
+   .else
+      lui   dest,value >> 16 + (value & 0x8000 != 0)
+      addiu dest,dest,value & 0xFFFF
+   .endif
+.endmacro
+
+.macro store_word, src_reg, dst_address
+	sw src_reg, dst_address
+.endmacro
+
+Main:
+	myli $t0, 0xA000
+	li rtemp_1, 0xA100     ; $t1 = 0xA100
+	li rtemp_2, 0x11111111 ; $t2 = 0x11111111
+
+Loop:
+	sw   $t2, BASE_ADDR($t0) ; Store byte at 0x0000 + t0
+	addi $t0, $t0, 4         ; ++ t0
+	blt  $t0, $t1, Loop      ; while (t0 < t1) keep looping
+
+.close

scripts/bin2exe.lua

@@ -20,12 +20,12 @@ function main(args)
         os.exit(1)
     end
 
-    print(string.format("Input file:  %s", args[1]))
-    print(string.format("Output file: %s", args[2]))
+    -- print(string.format("Input file:  %s", args[1]))
+    -- print(string.format("Output file: %s", args[2]))
     
     -- PS1 executables have a maximum size limit of 2MB
     local max_size = 0x200000
-    print(string.format("\nChecking input file size (max: %d bytes)...", max_size))
+    -- print(string.format("\nChecking input file size (max: %d bytes)...", max_size))
     
     local infile_size = file_size(args[1])
     if not infile_size then
@@ -33,14 +33,14 @@ function main(args)
         os.exit(1)
     end
     
-    print(string.format("Input file size: %d bytes", infile_size))
+    -- print(string.format("Input file size: %d bytes", infile_size))
     
     if infile_size > max_size then
         io.stderr:write(string.format("Error: Input file %s longer than %d bytes\n", args[1], max_size))
         os.exit(1)
     end
 
-    print("\nOpening files...")
+    -- print("\nOpening files...")
     local ofile = io.open(args[2], "wb")
     if not ofile then
         io.stderr:write("Error: Cannot open output file " .. args[2] .. "\n")
@@ -53,16 +53,15 @@ function main(args)
         os.exit(1)
     end
 
-    print("Writing PS-X executable header...")
-    
     -- PS1 executables start with "PS-X EXE" magic string
+    -- print("Writing PS-X executable header...")
     ofile:write("PS-X EXE")
     
     -- Write entry point address (where the PS1 will jump to start execution)
     -- 0x80010000 is a standard entry point in PS1 RAM
     ofile:seek("set", 0x10)
     ofile:write(string.pack("<I4", 0x80010000))
-    print("  Entry point:   0x80010000")
+    -- print("  Entry point:   0x80010000")
     
     -- Initial GP/R28 register value (Global Pointer for data addressing)
     -- 0xFFFFFFFF means it will be set by crt0.S startup code
@@ -70,21 +69,21 @@ function main(args)
     
     -- Destination address in RAM where the executable will be loaded
     ofile:write(string.pack("<I4", 0x80010000))
-    print("  Load address:  0x80010000")
+    -- print("  Load address:  0x80010000")
     
     -- Initial stack pointer (SP/R29) and frame pointer (FP/R30)
     -- 0x801FFF00 points near the top of the 2MB main RAM
     ofile:seek("set", 0x30)
     ofile:write(string.pack("<I4", 0x801FFF00))
-    print("  Stack pointer: 0x801FFF00")
+    -- print("  Stack pointer: 0x801FFF00")
     
     -- PS1 executables have an 0x800 (2048) byte header
     -- Zero fill the rest of the header
     ofile:seek("set", 0x800)
-    print("  Header padding complete (2048 bytes)")
+    -- print("  Header padding complete (2048 bytes)")
 
     -- Copy the actual program binary data after the header
-    print("\nCopying program data...")
+    -- print("\nCopying program data...")
     local buffer_size = 0x2000  -- 8KB chunks for efficient copying
     local bytes_copied = 0
     
@@ -118,13 +117,13 @@ function main(args)
     -- This goes at offset 0x1C in the header
     ofile:seek("set", 0x1C)
     ofile:write(string.pack("<I4", exe_size - 0x800))
-    print(string.format("\nProgram size field set to: %d bytes", exe_size - 0x800))
+    -- print(string.format("\nProgram size field set to: %d bytes", exe_size - 0x800))
 
     ifile:close()
     ofile:close()
     
-    print(string.format("\nSuccess! PS1 executable created: %s", args[2]))
-    print(string.format("Total file size: %d bytes", exe_size))
+    -- print(string.format("\nSuccess! PS1 executable created: %s", args[2]))
+    print(string.format("Total file size: %d bytes\n", exe_size))
 end
 
 -- Run main with command line arguments

scripts/build.ps1

@@ -2,27 +2,35 @@ $path_root    = split-path -Path $PSScriptRoot -Parent
 $path_build     = join-path $path_root 'build'
 $path_code      = join-path $path_root 'code'
 $path_scripts   = join-path $path_root 'scripts'
+$path_toolchain = join-path $path_root 'toolchain'
 
 if ((test-path $path_build) -eq $false) {
 	new-item -itemtype directory -path $path_build
 }
 
-$armips      = 'armips'
+$armips      = join-path $path_toolchain 'armips/armips.exe'
 $bin2exe_lua = join-path $path_scripts 'bin2exe.lua'
 $bin2exe_py  = join-path $path_scripts 'bin2exe.py'
 
-$path_fillmem = join-path $path_code    'fillmem'
-$src_fillmem  = join-path $path_fillmem 'fillmem.s'
-$bin_fillmem  = join-path $path_build   'fillmem.bin'
-$exe_fillmem  = join-path $path_build   'fillmem.exe'
+function build-program { param(
+	[string]$module,
+	[string]$unit
+)
+	$path_module = join-path $path_code   $module
+	$src         = join-path $path_module "$unit.s"
+	$bin         = join-path $path_build  "$unit.bin"
+	$exe         = join-path $path_build  "$unit.exe"
 
 	push-location $path_build
-write-host "Assembling: $src_fillmem`n"
-& $armips $src_fillmem
+	write-host "Assembling: $src`n"
+	& $armips $src
 
 	write-host 'Generating executable..'
-& lua $bin2exe_lua $bin_fillmem $exe_fillmem
-# & py $bin2exe_py $bin_fillmem $exe_fillmem
+	& lua $bin2exe_lua $bin $exe
+	# & py $bin2exe_py $bin $exe
 
 	write-host 'Done!'
 	pop-location
+}
+# build-program 'fillmem' 'fillmem'
+build-program 'warmup' 'exercise1'