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path: root/src/emu/drivenum.c
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generated by cgit v1.2.3-70-g09d2 (git 2.49.0) at 2025-05-02 15:20:47 +0000
 


/span>) & 0xf000) | ((value << 14) & 0xf0000) | ((value << 10) & 0xf00000)
	return snes_prepare_cheat(desc, addr, newval)
end

function codefuncs.snes_ar(desc, code)
	code = code:gsub("[: %-]", "")
	if #code ~= 8 then
		error("error action replay cheat incorrect length " .. desc)
	end
	local addr = tonumber(code:sub(1, 6), 16)
	local val = tonumber(code:sub(7, 8), 16)
	if not addr or not val then
		error("error parsing action replay cheat " .. desc)
	end
	return snes_prepare_cheat(desc, addr, val)
end

function codefuncs.megadriv_gg(desc, code)
	local xlate = { A = 0, B = 1, C = 2, D = 3, E = 4, F = 5, G = 6, H = 7, J = 8, K = 9, L = 10, M = 11, N = 12,
			P = 13, R = 14, S = 15, T = 16, V = 17,  W = 18, X = 19, Y = 20, Z = 21, ["0"] = 22, ["1"] = 23,
			["2"] = 24, ["3"] = 25, ["4"] = 26, ["5"] = 27, ["6"] = 28, ["7"] = 29, ["8"] = 30, ["9"] = 31 }
	local value = 0
	local count = 0
	code:upper():gsub("(.)", function(s)
			if s == "-" then
				return
			elseif not xlate[s] then
				error("error parsing game genie cheat " .. desc)
			end
			count = count + 1
			value = (value << 5) | xlate[s]
		end)
	if count ~= 8 then
		error("error game genie cheat incorrect length " .. desc)
	end
	local newval = ((value >> 32) & 0xff) | ((value >> 3) & 0x1f00) | ((value << 5) & 0xe000)
	local addr = (value & 0xff00ff) | ((value >> 16) & 0xff00)
	return prepare_rom_cheat(desc, ":mdslot:cart:rom", addr, newval, 16)
end

function codefuncs.megadriv_ar(desc, code)
	code = code:gsub("[: %-]", "")
	if #code ~= 10 then
		error("error action replay cheat incorrect length " .. desc)
	end
	local addr = tonumber(code:sub(1, 6), 16)
	local val = tonumber(code:sub(7, 10), 16)
	if addr < 0xff0000 then
		error("error action replay cheat not ram addr " .. desc)
	end
	return prepare_ram_cheat(desc, ":maincpu", addr, val, 16)
end

local function gbgg_ggcodes(desc, code, region)
	code = code:gsub("%-", "")
	local comp
	if #code == 6 then
		comp = -1
	elseif #code == 9 then
		comp = ~tonumber(code:sub(7, 7) .. code:sub(9, 9), 16) & 0xff
		comp = ((comp >> 2) | ((comp << 6) & 0xc0)) ~ 0x45
	else
		error("error game genie cheat incorrect length " .. desc)
	end
	local newval = tonumber(code:sub(1, 2), 16)
	local addr = tonumber(code:sub(6, 6) .. code:sub(3, 5), 16)
	if not newval or not addr or not comp then
		error("error parsing game genie cheat " .. desc)
	end
	addr = (~addr & 0xf000) | (addr & 0xfff)
	if addr > 0x7fff then
		error("error game genie cheat bad addr " .. desc)
	end
	if comp == -1 then
		return prepare_rom_cheat(desc, region, addr, newval, 8)
	else
		-- assume 8K banks
		return prepare_rom_cheat(desc, region, addr, newval, 8, 8192, comp)
	end
	return cheat
end

function codefuncs.gameboy_gg(desc, code)
	return gbgg_ggcodes(desc, code, ":gbslot:cart:rom")
end

function codefuncs.gamegear_gg(desc, code)
	return gbgg_ggcodes(desc, code, ":slot:cart:rom")
end

function codefuncs.gamegear_ar(desc, code)
	code = code:gsub("[: %-]", "")
	if #code ~= 8 then
		error("error action replay cheat incorrect length " .. desc)
	end
	local addr = tonumber(code:sub(1, 6), 16)
	local val = tonumber(code:sub(7, 8), 16)
	if addr < 0xc000 or addr >= 0xe000 then
		error("error action replay cheat not ram addr " .. desc)
	end
	return prepare_ram_cheat(desc, ":maincpu", addr, val, 8)
end

codefuncs.sms_ar = codefuncs.gamegear_ar

function simple.conv_cheat(data)
	local cheats = {}
	for line in data:gmatch('([^\n;]+)') do
		local set, cputag, offset, size, val, desc = line:match('([^,]+),([^,]+),([^,]+),?([^,]*),?([^,]*),(.*)')
		if set == simple.romset then
			local cheat
			if cputag:sub(1,1) ~= ":" then
				local list, name = set:match('([^/]+)/(.+)')
				local func = list .. "_" .. cputag
				if list and desc and codefuncs[func] then
					local status
					status, cheat = pcall(codefuncs[func], desc, offset)
					if not status then
						emu.print_error(cheat)
						cheat = nil
					end
				end
			elseif size and val then
				if size == "w" then
					size = 16
				elseif size == "d" then
					size = 32
				elseif size == "q" then
					size = 64
				else
					size = 8
				end
				offset = tonumber(offset, 16)
				val = tonumber(val, 16)
				if manager:machine().devices[cputag] then
					cheat = prepare_ram_cheat(desc, cputag, offset, val, size)
				else
					cheat = prepare_rom_cheat(desc, cputag, offset, val, size)
				end
			end
			if cheat then
				cheats[#cheats + 1] = cheat
			end
		end
	end
	currcheat = nil
	return cheats
end

return simple