diff --git a/host/scripts/inlretro.lua b/host/scripts/inlretro.lua
index 25d3b87..60dd98d 100644
--- a/host/scripts/inlretro.lua
+++ b/host/scripts/inlretro.lua
@@ -97,6 +97,37 @@ function main ()
 	--local cart_console = "GBA"
 	--local cart_console = "SMS"
 
+-- =====================================================
+-- USERS: Change process options to define interactions with cartridge.
+--
+-- Note: RAM is not present in all carts, related settings 
+-- will be ignored by mappers that don't support RAM.
+-- =====================================================
+	local process_opts = {
+		test = true,
+		read = true,
+		erase = false,
+		program = false,
+		verify = false,
+		dumpram = false,
+		writeram = false,
+		dumpfile = "ignore/dump.bin",
+		flashfile = "",
+		verifyfile = "",
+		dumpram_filename = "",
+		writeram_filename = "",
+	}
+-- =====================================================
+-- USERS: Change console options to define interactions with cartridge.
+-- These options can vary from cartridge to cartridge depending on specific hardware it contains.
+-- =====================================================
+	local console_opts = {
+		mirror = "V", -- Only used by NROM, also possible to set to "H"
+		prg_rom_size_kb = 128, -- Size of NES PRG-ROM in kb
+		chr_rom_size_kb = 128, -- Size of NES CHR-ROM in kb
+		wram_size_kb = 0,      -- Size of NES wram in kb
+	}
+
 	local rv
 --	rv = dict.pinport( "DATA_SET", 0xAA )
 --	rv = dict.pinport( "DATA_RD" )
@@ -291,101 +322,10 @@ function main ()
 			--set rom types and sizes
 			--perform desired operation
 			--CART and programmer should be in a RESET condition upon calling the specific script
-
-			--DUALPORT
-			--curcart.process( true, false, false, false, false, "ignore/dump.bin", "ignore/ddug2.bin", "ignore/verifyout.bin")
-			--MM2
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/mm2_i0.prg", "ignore/verifyout.bin")
-			--curcart.process( true, true, false, false, false, "ignore/dump.bin", "ignore/mm2_i0.prg", "ignore/verifyout.bin")
-
-			--UNROM512 mapper 30
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/BBC_nonJW.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, false, false, false, "ignore/dump.bin", "ignore/MysticOrigins.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/NESmaker.nes", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/tb_map30.prg", "ignore/verifyout.bin")
-
-
-			--COLOR NINJA
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/ninja.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/alfonzo.bin", "ignore/verifyout.bin")
 			
-			--A53 PLCC
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/a53v1_SBR2.prg", "ignore/verifyout.bin")
-			--A53 tssop
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/a53vol3.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/2a03puritans_RE.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/a53vol3_giftmsg_0xFF.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, false, false, false, "ignore/dump.bin", "ignore/writethe actual message.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/mappertests/test28-8Mbit.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/mappertests/M28_P1M_CR32K.prg", "ignore/verifyout.bin")
-
-			--easy NSF tssop
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/2a03puritans_RE.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/rndm2_1MB.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/pico2015_RELEASE_1MB.prg", "ignore/verifyout.bin")
-
-
-
-
-			--later scripts which don't require specific firmware functions
-			--goal is to convert scripts above to be more like the ones below now that
-			--have a better idea of what works best and minimizing firmware compilation and updates
-
-			--NROM
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/M0_P32K_C8K.bin", "ignore/verifyout.bin")
-			--curcart.process( true, true, true, true, true, "ignore/dump.bin", "ignore/ddug2.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/NTB_RE.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/MM_demo.bin", "ignore/verifyout.bin")
-			--curcart.process( true, true, true, true, true, "ignore/dump.bin", "ignore/NnD.bin", "ignore/verifyout.bin", "V")
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/DEMO.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/NES_hb_present.bin", "ignore/verifyout.bin")
-
-			--MMC1
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/P256K.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/BB_sgrom.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/Zelda2.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/Zelda2_doubleprg.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/alfonzoMMC1.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, false, false, false, nil, nil, nil, true, false, "ignore/ramdump.bin", "ignore/zelda2_pauliscool.bin")
-
-
-			--UxROM
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/AFB_128.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/nomolosFINAL.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/owlia_revb.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, false, false, false, "ignore/dump.bin", "ignore/rushnattack.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, false, false, false, "ignore/dump.bin", "ignore/TDfix.prg", "ignore/verifyout.bin")
-
-			--CNROM
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/galf.bin", "ignore/verifyout.bin")
-
-			--MMC3
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/P512K_C256K.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/P256K_C128K.bin", "ignore/verifyout.bin")
-			--curcart.process( true, true, true, false, true, "ignore/dump.bin", "ignore/kirby.nes", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/kirby.bin", "ignore/verifyout.bin", false, false, "ignore/ramdump.bin", "ignore/ramwrite.bin")
-			--curcart.process( true, false, false, false, false, "ignore/dump.bin", "ignore/kirby.bin", "ignore/verifyout.bin", true, true, "ignore/ramdump.bin", "ignore/kirby3xSave.bin")
-
-			--MMC2
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/punchout.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, false, false, false, "ignore/dump.bin", "ignore/P256K_C128K.bin", "ignore/verifyout.bin")
-			--MMC4
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/fe.bin", "ignore/verifyout.bin")
-
-			--COLOR DREAMS
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/multicart_mojontalesFINAL.prg", "ignore/verifyout.bin")
-
-			--BNROM
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/lizard_PG.prg", "ignore/verifyout.bin")
-			curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/lizard_v2.prg", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/hh85.prg", "ignore/verifyout.bin")
-
-			--FME7
-			--curcart.process( true, false, true, true, false, "ignore/dump.bin", "ignore/P256K_C256K.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/gimmick.bin", "ignore/verifyout.bin")
-			--curcart.process( true, false, true, true, true, "ignore/dump.bin", "ignore/barcode_prgx2.bin", "ignore/verifyout.bin")
-
-			--curcart.process( true, false, false, false, false, nil, nil, nil, true, true, "ignore/ramdump.bin", "ignore/kirby3xSave.bin")
+			-- Perform requested operations with provided options.
+			curcart.process(process_opts, console_opts)
+			
 		--[[
 			--FLASHING:
 			--erase cart
diff --git a/host/scripts/inlretro2.lua b/host/scripts/inlretro2.lua
index 3706484..63d79f3 100644
--- a/host/scripts/inlretro2.lua
+++ b/host/scripts/inlretro2.lua
@@ -9,10 +9,13 @@ end
 
 
 -- Wrapper for managing NES/Famicom operations.
-function nes_exec(mapper, dump_filename, flash_filename, verify_filename)
+function nes_exec(mapper, dump_filename, flash_filename, verify_filename, ramdump_filename, ramwrite_filename, console_opts)
     local dict = require "scripts.app.dict"
     local nes = require "scripts.app.nes"
     
+    -- TODO: This should probably be one level up.
+    -- TODO: Ram probably needs a verify file as well?
+
     -- Always test!
     local do_test = true
     
@@ -27,10 +30,48 @@ function nes_exec(mapper, dump_filename, flash_filename, verify_filename)
     -- If a verify_filename was provided, dump data from cartridge after flash to a file.
     local do_verify = not isempty(verify_filename)
 
-    -- TODO: Add other mappers.
+    local do_dumpram = not isempty(ramdump_filename)
+    local do_writeram = not isempty(ramwrite_filename)
+
+    -- Pack main process state into table.
+    local process_opts = {
+        test = do_test,
+        read = do_read,
+        dump_filename = dump_filename,
+        erase = do_erase,
+        program = do_program,
+        program_filename = flash_filename,
+        verify = do_verify,
+        verify_filename = verify_filename,
+        dumpram = do_dumpram,
+        dumpram_filename = ramdump_filename,
+        writeram = do_writeram,
+        writeram_filename = ramwrite_filename,
+    }
+
+    -- Defensively filter out any console options that are irrelevant to NES support.
+    -- This will matter more when software support exists for other consoles.
+    local nes_opts = {
+        wram_size_kb = console_opts["wram_size_kb"],
+        prg_rom_size_kb = console_opts["prg_rom_size_kb"],
+        chr_rom_size_kb = console_opts["chr_rom_size_kb"],
+        mirror = nil -- Used by NROM mapper only, "H" or "V".
+    }
+
     local mappers = {
+        action53_tsop = require "scripts.nes.action53_tsop",
+        action53 = require "scripts.nes.action53",
+        bnrom = require "scripts.nes.bnrom",
+        cdream = require "scripts.nes.cdream",
+        cninja = require "scripts.nes.cninja",
+        cnrom = require "scripts.nes.cnrom",
+        dualport = require "scripts.nes.dualport",
+        easynsf = require "scripts.nes.easyNSF",
+        fme7 = require "scripts.nes.fme7",
+        mapper30 = require "scripts.nes.mapper30",
         mmc1 = require "scripts.nes.mmc1",
         mmc3 = require "scripts.nes.mmc3",
+        mmc4 = require "scripts.nes.mmc4",
         nrom = require "scripts.nes.nrom",
         unrom = require "scripts.nes.unrom"
     }
@@ -46,7 +87,7 @@ function nes_exec(mapper, dump_filename, flash_filename, verify_filename)
         -- Attempt requested operations with hardware!
 
         -- TODO: Do plumbing for interacting with RAM.
-        m.process(do_test, do_read, do_erase, do_program, do_verify, dump_filename, flash_filename, verify_filename)
+        m.process(process_opts, console_opts)
     end
 end
 
@@ -59,6 +100,9 @@ function main()
     --  dump_filename:   string, filename used for writing dumped data.
     --  flash_filename:  string, filename containing data to write cartridge.
     --  verify_filename: string, filename used for writing back data written to cartridge for verification.
+    --  nes_prg_rom_size_kb:    int, size of cartridge PRG-ROM in kb.
+    --  nes_chr_rom_size_kb:    int, size of cartridge CHR-ROM in kb.
+    --  nes_wram_size_kb:       int, size of cartridge WRAM in kb.
 
     -- TODO: Add SNES support, as it appears to be currently usable?
     local consoles = {
@@ -68,7 +112,14 @@ function main()
     if f == nil then 
         print("UNSUPPORTED CONSOLE")
     else
-        f(mapper_name, dump_filename, flash_filename, verify_filename)
+        -- TODO: Make anything console specific a dict to make function signatures less terrible.
+        local console_opts = {
+            wram_size_kb = nes_wram_size_kb,
+            prg_rom_size_kb = nes_prg_rom_size_kb,
+            chr_rom_size_kb = nes_chr_rom_size_kb
+        }
+
+        f(mapper_name, dump_filename, flash_filename, verify_filename, ramdump_filename, ramwrite_filename, console_opts)
     end
 end
 
diff --git a/host/scripts/nes/action53.lua b/host/scripts/nes/action53.lua
index 28f6cf6..3c14a7c 100644
--- a/host/scripts/nes/action53.lua
+++ b/host/scripts/nes/action53.lua
@@ -72,11 +72,19 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
 
 	local rv = nil
 	local file 
-
+	-- TODO: Handle variable ROM sizes.
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/action53_tsop.lua b/host/scripts/nes/action53_tsop.lua
index 6b8e064..092ee0a 100644
--- a/host/scripts/nes/action53_tsop.lua
+++ b/host/scripts/nes/action53_tsop.lua
@@ -199,11 +199,19 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
 
 	local rv = nil
 	local file 
-
+	-- TODO: Handle variable ROM sizes.
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/bnrom.lua b/host/scripts/nes/bnrom.lua
index d36aa40..fc6c1e2 100644
--- a/host/scripts/nes/bnrom.lua
+++ b/host/scripts/nes/bnrom.lua
@@ -210,13 +210,22 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile)
+--local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
 
 	local rv = nil
 	local file 
-	local prg_size = 512
-	local chr_size = 0
-	local wram_size = 0
+	local prg_size = console_opts["prg_rom_size_kb"]
+	local chr_size = console_opts["chr_rom_size_kb"]
+	local wram_size = console_opts["wram_size_kb"]
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/cdream.lua b/host/scripts/nes/cdream.lua
index 72a8103..0bd1e9e 100644
--- a/host/scripts/nes/cdream.lua
+++ b/host/scripts/nes/cdream.lua
@@ -453,13 +453,21 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
 
 	local rv = nil
 	local file 
-	local prg_size = 512
-	local chr_size = 128
-	local wram_size = 0
+	local prg_size = console_opts["prg_rom_size_kb"]
+	local chr_size = console_opts["chr_rom_size_kb"]
+	local wram_size = console_opts["wram_size_kb"]
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/cninja.lua b/host/scripts/nes/cninja.lua
index c70f8c1..10bcb84 100644
--- a/host/scripts/nes/cninja.lua
+++ b/host/scripts/nes/cninja.lua
@@ -68,10 +68,19 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
 
 	local rv = nil
 	local file 
+	-- TODO: Support variable ROM sizes.
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/cnrom.lua b/host/scripts/nes/cnrom.lua
index be489ba..0d23d11 100644
--- a/host/scripts/nes/cnrom.lua
+++ b/host/scripts/nes/cnrom.lua
@@ -360,13 +360,21 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
 
 	local rv = nil
 	local file 
-	local prg_size = 32
-	local chr_size = 32
-	local wram_size = 0
+	local prg_size = console_opts["prg_rom_size_kb"]
+	local chr_size = console_opts["chr_rom_size_kb"]
+	local wram_size = console_opts["wram_size_kb"]
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/dualport.lua b/host/scripts/nes/dualport.lua
index 9f2eb8d..77132a3 100644
--- a/host/scripts/nes/dualport.lua
+++ b/host/scripts/nes/dualport.lua
@@ -151,10 +151,19 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile)
-
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
+	
 	local rv = nil
 	local file 
+	-- TODO: Handle variable rom sizes.
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/easyNSF.lua b/host/scripts/nes/easyNSF.lua
index b343caa..b35745e 100644
--- a/host/scripts/nes/easyNSF.lua
+++ b/host/scripts/nes/easyNSF.lua
@@ -71,11 +71,19 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
 
 	local rv = nil
 	local file 
-
+	-- TODO: Handle variable rom sizes.
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/fme7.lua b/host/scripts/nes/fme7.lua
index d296899..ff79516 100644
--- a/host/scripts/nes/fme7.lua
+++ b/host/scripts/nes/fme7.lua
@@ -520,13 +520,26 @@ end
 
 
 --Cart should be in reset state upon calling this function 
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile, dumpram, writeram, ramdumpfile, ramwritefile)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
+	-- FME7 has RAM capability present in some carts.
+	local dumpram = process_opts["dumpram"]
+	local ramdump_filename = process_opts["dumpram_filename"]
+	local writeram = process_opts["writeram"]
+	local ramwrite_filename = process_opts["writeram_filename"]
 
 	local rv = nil
 	local file 
-	local prg_size = 256
-	local chr_size = 256
-	local wram_size = 8
+	local prg_size = console_opts["prg_rom_size_kb"]
+	local chr_size = console_opts["chr_rom_size_kb"]
+	local wram_size = console_opts["wram_size_kb"]
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/mapper30.lua b/host/scripts/nes/mapper30.lua
index 9c3b4b3..5a59ec6 100644
--- a/host/scripts/nes/mapper30.lua
+++ b/host/scripts/nes/mapper30.lua
@@ -47,11 +47,20 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile)
-
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"] 
+	
 	local rv = nil
-	local file 
-	local size = 512
+	local file
+	-- TODO: Cleanup needed here, support chrrom, make this look more like other mapper scripts.
+	local size = console_opts["prg_rom_size_kb"]
 	--local filetype = "nes"
 	local filetype = "bin"
 
diff --git a/host/scripts/nes/mmc1.lua b/host/scripts/nes/mmc1.lua
index 049e02a..2377d7e 100644
--- a/host/scripts/nes/mmc1.lua
+++ b/host/scripts/nes/mmc1.lua
@@ -490,13 +490,26 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile, dumpram, writeram, ramdumpfile, ramwritefile)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
+	-- MMC1 has RAM capability present in some carts.
+	local dumpram = process_opts["dumpram"]
+	local ramdump_filename = process_opts["dumpram_filename"]
+	local writeram = process_opts["writeram"]
+	local ramwrite_filename = process_opts["writeram_filename"]
 
 	local rv = nil
 	local file 
-	local prg_size = 256
-	local chr_size = 128
-	local wram_size = 8
+	local prg_size = console_opts["prg_rom_size_kb"]
+	local chr_size = console_opts["chr_rom_size_kb"]
+	local wram_size = console_opts["wram_size_kb"]
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/mmc3.lua b/host/scripts/nes/mmc3.lua
index cea5351..327eda1 100644
--- a/host/scripts/nes/mmc3.lua
+++ b/host/scripts/nes/mmc3.lua
@@ -504,13 +504,26 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile, dumpram, writeram, ramdumpfile, ramwritefile)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
+	-- MMC3 has RAM capability present in some carts.
+	local dumpram = process_opts["dumpram"]
+	local ramdump_filename = process_opts["dumpram_filename"]
+	local writeram = process_opts["writeram"]
+	local ramwrite_filename = process_opts["writeram_filename"]
 
 	local rv = nil
 	local file 
-	local prg_size = 512
-	local chr_size = 256
-	local wram_size = 8
+	local prg_size = console_opts["prg_rom_size_kb"]
+	local chr_size = console_opts["chr_rom_size_kb"]
+	local wram_size = console_opts["wram_size_kb"]
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/mmc4.lua b/host/scripts/nes/mmc4.lua
index 7d6d93a..f965dd1 100644
--- a/host/scripts/nes/mmc4.lua
+++ b/host/scripts/nes/mmc4.lua
@@ -446,13 +446,26 @@ end
 
 
 --Cart should be in reset state upon calling this function 
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile, dumpram, writeram, ramdumpfile, ramwritefile)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
+	-- MMC4 has RAM capability present in some carts.
+	local dumpram = process_opts["dumpram"]
+	local ramdump_filename = process_opts["dumpram_filename"]
+	local writeram = process_opts["writeram"]
+	local ramwrite_filename = process_opts["writeram_filename"]
 
 	local rv = nil
 	local file 
-	local prg_size = 256
-	local chr_size = 128
-	local wram_size = 8
+	local prg_size = console_opts["prg_rom_size_kb"]
+	local chr_size = console_opts["chr_rom_size_kb"]
+	local wram_size = console_opts["wram_size_kb"]
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/nrom.lua b/host/scripts/nes/nrom.lua
index c2f6835..012b9ec 100644
--- a/host/scripts/nes/nrom.lua
+++ b/host/scripts/nes/nrom.lua
@@ -270,17 +270,24 @@ end
 
 
 
-
-
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile, mirror)
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
 
 	local rv = nil
 	local file 
-	local prg_size = 32
-	local chr_size = 8
-	local wram_size = 0
+	local prg_size = console_opts["prg_rom_size_kb"]
+	local chr_size = console_opts["chr_rom_size_kb"]
+	local wram_size = console_opts["wram_size_kb"]
+	local mirror = console_opts["mirror"]
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/scripts/nes/unrom.lua b/host/scripts/nes/unrom.lua
index 7f2cf5f..3e80da2 100644
--- a/host/scripts/nes/unrom.lua
+++ b/host/scripts/nes/unrom.lua
@@ -280,13 +280,21 @@ end
 
 --Cart should be in reset state upon calling this function 
 --this function processes all user requests for this specific board/mapper
-local function process( test, read, erase, program, verify, dumpfile, flashfile, verifyfile)
-
+local function process(process_opts, console_opts)
+	local test = process_opts["test"]
+	local read = process_opts["read"]
+	local erase = process_opts["erase"]
+	local program = process_opts["program"]
+	local verify = process_opts["verify"]
+	local dumpfile = process_opts["dump_filename"]
+	local flashfile = process_opts["flash_filename"]
+	local verifyfile = process_opts["verify_filename"]
+	
 	local rv = nil
 	local file 
-	local prg_size = 512
-	local chr_size = 0
-	local wram_size = 0
+	local prg_size = console_opts["prg_rom_size_kb"]
+	local chr_size = console_opts["chr_rom_size_kb"]
+	local wram_size = console_opts["wram_size_kb"]
 
 --initialize device i/o for NES
 	dict.io("IO_RESET")
diff --git a/host/source/inlprog.c b/host/source/inlprog.c
index b5ad550..d2c3809 100644
--- a/host/source/inlprog.c
+++ b/host/source/inlprog.c
@@ -31,15 +31,22 @@
 
 
 // TODO: Finish HELP for all currently supported options.
+// TODO: Migrate to argp for more descriptive flags.
 const char *HELP =  "Usage: inlretro [options]\n\n"\
 					"Options:\n"\
+					"  -a [dumpram_filename]\tIf provided write ram to this filename\n"\
+					"  -b [writeram_filename]If provided write this file's contents to ram\n"\
 					"  -c [console]\t\tConsole port, {NES}\n"\
 					"  -d [dump_filename]\tIf provided, dump cartridge ROMs to this filename\n"\
+					"  -h\t\t\tDisplays this message.\n"\
 					"  -m [mapper]\t\tNES console only, mapper ASIC on cartridge\n"\
 					"  \t\t\t{mmc1,mmc3,nrom}\n"\
 					"  -p [program_filename]\tIf provided, write this data to cartridge\n"\
 					"  -s [lua_script]\tIf provided, use this script for main application logic\n"\
-					"  -h\t\t\tDisplays this message.\n";
+					"  -v [verify_filename]\tIf provided, writeback written rom to this filename\n"
+					"  -w [wram_size_kb]\tNES-only, size of WRAM in kb\n"\
+					"  -x [prg_rom_size_kb]\tNES-only, size of PRG-ROM in kb\n"\
+					"  -y [chr_rom_size_kb]\tNES-only, size of CHR-ROM in kb\n";
 
 // Struct used to control functionality.
 typedef struct {
@@ -47,16 +54,31 @@ typedef struct {
 	char *mapper_name;
 	int display_help;
 
+	// NES Functionality
+	int chr_rom_size_kb;
+	int prg_rom_size_kb;
+	int wram_size_kb;
+
 	char *dump_filename;
 	char *program_filename;
+	char *ramdump_filename;
+	char *ramwrite_filename;
+	char *verify_filename;
+
 	char *lua_filename;
 } INLOptions;
 
+// Returns true if given number is a power of 2, and at least minimum size.
+int isValidROMSize(int x, int min) {
+	return ((x & (x - 1)) == 0) && x >= min;
+}
+
+
 // Parse options and flags, create struct to drive program.
 INLOptions* parseOptions(int argc, char *argv[]) {
 	// lower case flags suggested for average user
 
-	const char *FLAG_FORMAT = "hc:d:m:p:s:";
+	const char *FLAG_FORMAT = "a:b:hc:d:m:p:s:v:w:x:y:";
 	int index = 0;
 	int rv = 0;
 	// opterr = 0;
@@ -97,6 +119,8 @@ INLOptions* parseOptions(int argc, char *argv[]) {
 			// case 'n': n_flag = 1; break;
 			// case 'e': e_flag = 1; break;
 			// case 'f': f_flag = 1; break;
+			case 'a': opts->ramdump_filename = optarg; break;
+			case 'b': opts->ramwrite_filename = optarg; break;
 			case 'h': opts->display_help = 1; break;
 			// case 'i': i_flag = 1; break;
 			// case 't': t_flag = 1; break;
@@ -110,6 +134,10 @@ INLOptions* parseOptions(int argc, char *argv[]) {
 			case 'm': opts->mapper_name = optarg; break;
 			case 'p': opts->program_filename = optarg; break;
 			case 's': opts->lua_filename = optarg; break;
+			case 'v': opts->verify_filename = optarg; break;
+			case 'w': opts->wram_size_kb = atoi(optarg); break;
+			case 'x': opts->prg_rom_size_kb = atoi(optarg); break;
+			case 'y': opts->chr_rom_size_kb = atoi(optarg); break;
 			// case 'v': v_value = optarg; break;
 			// case 'C': C_value = optarg; break;
 			// case 'L': L_value = optarg; break;
@@ -276,6 +304,27 @@ int main(int argc, char *argv[])
 		return 1;
 	}
 
+	// Check for sane user input.
+	if (strcmp("NES", opts->console_name) == 0) {
+		// ROM sizes must be non-zero, power of 2, and greater than 16.
+		if (isValidROMSize(opts->prg_rom_size_kb, 16)) {
+			printf("PRG-ROM must be non-zero power of 2, 16kb or greater.\n");
+			return 1;
+		}
+		// Not having CHR-ROM is normal for certain types of carts.
+		// TODO: Update these checks with known info about mappers/carts.
+		if (isValidROMSize(opts->chr_rom_size_kb, 8) || opts->chr_rom_size_kb == 0) {
+			printf("CHR-ROM must be zero or power of 2, 8kb or greater.\n");
+			return 1;
+		}
+
+		// Not having WRAM is very normal.
+		if (isValidROMSize(opts->wram_size_kb, 8) || opts->wram_size_kb == 0) {
+			printf("WRAM must be zero or power of 2, 8kb or greater.\n");
+			return 1;
+		}
+	}
+
 	//Start up Lua
 	L = lua_init();
 	
@@ -343,6 +392,24 @@ int main(int argc, char *argv[])
 	lua_pushstring(L, opts->program_filename);
 	lua_setglobal(L, "flash_filename");
 
+	lua_pushstring(L, opts->verify_filename);
+	lua_setglobal(L, "verify_filename");
+
+	lua_pushstring(L, opts->ramdump_filename);
+	lua_setglobal(L, "ramdump_filename");
+
+	lua_pushstring(L, opts->ramwrite_filename);
+	lua_setglobal(L, "ramwrite_filename");
+
+	lua_pushinteger(L, opts->wram_size_kb);
+	lua_setglobal(L, "nes_wram_size_kb");
+
+	lua_pushinteger(L, opts->prg_rom_size_kb);
+	lua_setglobal(L, "nes_prg_rom_size_kb");
+
+	lua_pushinteger(L, opts->chr_rom_size_kb);
+	lua_setglobal(L, "nes_chr_rom_size_kb");
+	
 	// USB device is open, pass args and control over to Lua.
 	// If lua_filename isn't set from args, use default script.
 	char *DEFAULT_SCRIPT = "scripts/inlretro.lua";