Merge branch 'unrom-find-banktable' into 'master'

UNROM: automatically find banktable

See merge request InfiniteNesLives/INL-retro-progdump!10

.gitignore

@@ -23,4 +23,4 @@ host/source/lua/liblua.a
 host/inlretro
 
 # OS X Metadata
-.DS_Store
+.DS_Store

host/scripts/app/dump.lua

@@ -10,7 +10,7 @@ local snes = require "scripts.app.snes"
 -- file constants
 
 -- local functions
-local function dumptofile( file, sizeKB, map, mem, debug )
+local function dumptocallback( callback, sizeKB, map, mem, debug )
 
 	local buff0 = 0
 	local buff1 = 1
@@ -94,7 +94,7 @@ local function dumptofile( file, sizeKB, map, mem, debug )
 		--need to setup buffer manager to nak anytime something like this happens
 		--the following setup slows down everything due to status waits..
 --		buffers.status_wait({buff0}, {"DUMPED"}) 
---		file:write( dict.buffer_payload_in( buff_size ))
+--		callback( dict.buffer_payload_in( buff_size ))
 --		buffers.status_wait({buff1}, {"DUMPED"}) 
 
 		--stm adapter having issues with race situation..
@@ -106,7 +106,7 @@ local function dumptofile( file, sizeKB, map, mem, debug )
 			--print(nak, "cur_buff->status: ", cur_buff_status)
 			cur_buff_status = dict.buffer("GET_CUR_BUFF_STATUS")
 		end
-		file:write( dict.buffer_payload_in( buff_size ))
+		callback( dict.buffer_payload_in( buff_size ))
 	--	print("dumped page:", i)
 		
 		--if ( (i % (1024*1024/buff_size/16)) == 0) then
@@ -143,6 +143,15 @@ local function dumptofile( file, sizeKB, map, mem, debug )
 	dict.buffer("RAW_BUFFER_RESET")
 end
 
+local function dumptofile( file, sizeKB, map, mem, debug )
+	dumptocallback(
+		function (data)
+			file:write(data)
+		end,
+		sizeKB, map, mem, debug
+	)
+end
+
 
 --//main collected as much data about cart as possible without reading roms
 --//now it's time to start running CRC's to try and finalize mapper/config
@@ -507,6 +516,7 @@ end
 dump.dump_nes = dump_nes
 dump.dump_snes = dump_snes
 dump.dumptofile = dumptofile
+dump.dumptocallback = dumptocallback
 
 -- return the module's table
 return dump

host/scripts/inlretro2.lua

@@ -31,7 +31,8 @@ function nes_exec(mapper, dump_filename, flash_filename, verify_filename)
     local mappers = {
         mmc1 = require "scripts.nes.mmc1",
         mmc3 = require "scripts.nes.mmc3",
-        nrom = require "scripts.nes.nrom"
+        nrom = require "scripts.nes.nrom",
+        unrom = require "scripts.nes.unrom"
     }
 
     dict.io("IO_RESET")	
@@ -72,4 +73,4 @@ function main()
 end
 
 -- Don't do this. Next iteration will call a function, not the whole script.
-main()
+main()

host/scripts/nes/unrom.lua

@@ -10,8 +10,8 @@ local flash = require "scripts.app.flash"
 
 -- file constants & variables
 local mapname = "UxROM"
-local banktable_base = 0xCC84 --Nomolos
-		--Nomolos' bank table is at $CC84 so hard code that for now
+local banktable_base = nil
+		--Nomolos' bank table is at $CC84
 		--wr_bank_table(0xCC84, 32)
 		--Owlia bank table
 		--wr_bank_table(0xE473, 32)
@@ -67,6 +67,35 @@ local function prgrom_manf_id( debug )
 
 end
 
+--find a viable banktable location
+local function find_banktable( banktable_size )
+	local search_base = 0x0C -- search in $C000-$F000, the fixed bank
+	local KB_search_space = 16
+
+	--get the fixed bank's content
+	local search_data = ""
+	dump.dumptocallback(
+		function (data)
+			search_data = search_data .. data
+		end,
+		KB_search_space, search_base, "NESCPU_4KB", false
+	)
+
+	--construct the byte sequence that we need
+	local searched_sequence = ""
+	while ( searched_sequence:len() < banktable_size ) do
+		searched_sequence = searched_sequence .. string.char(searched_sequence:len())
+	end
+
+	--search for the banktable in the fixed bank
+	position_in_fixed_bank = string.find( search_data, searched_sequence, 1, true )
+	if ( position_in_fixed_bank == nil ) then
+		return nil
+	end
+
+	--compute the cpu offset of this data
+	return 0xC000 + position_in_fixed_bank - 1
+end
 
 --dump the PRG ROM
 local function dump_prgrom( file, rom_size_KB, debug )
@@ -279,7 +308,18 @@ local function process( test, read, erase, program, verify, dumpfile, flashfile,
 		print("\nDumping PRG-ROM...")
 		file = assert(io.open(dumpfile, "wb"))
 
-		--TODO find bank table to avoid bus conflicts!
+		--find bank table to avoid bus conflicts
+		if ( banktable_base == nil ) then
+			local KB_per_bank = 16
+			banktable_base = find_banktable( prg_size / KB_per_bank )
+			if ( banktable_base == nil ) then
+				print( "BANKTABLE NOT FOUND" )
+				return
+			else
+				print( "found banktable addr = " .. banktable_base )
+			end
+		end
+
 		--dump cart into file
 		--dump.dumptofile( file, prg_size, "UxROM", "PRGROM", true )
 		dump_prgrom(file, prg_size, false)