diff --git a/host/scripts/nes/fme7.lua b/host/scripts/nes/fme7.lua
index ff79516..75042ac 100644
--- a/host/scripts/nes/fme7.lua
+++ b/host/scripts/nes/fme7.lua
@@ -531,9 +531,9 @@ local function process(process_opts, console_opts)
 	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 ramdumpfile = process_opts["dumpram_filename"]
 	local writeram = process_opts["writeram"]
-	local ramwrite_filename = process_opts["writeram_filename"]
+	local ramwritefile = process_opts["writeram_filename"]
 
 	local rv = nil
 	local file 
diff --git a/host/scripts/nes/mmc1.lua b/host/scripts/nes/mmc1.lua
index 2377d7e..a06a285 100644
--- a/host/scripts/nes/mmc1.lua
+++ b/host/scripts/nes/mmc1.lua
@@ -501,9 +501,9 @@ local function process(process_opts, console_opts)
 	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 ramdumpfile = process_opts["dumpram_filename"]
 	local writeram = process_opts["writeram"]
-	local ramwrite_filename = process_opts["writeram_filename"]
+	local ramwritefile = process_opts["writeram_filename"]
 
 	local rv = nil
 	local file 
diff --git a/host/scripts/nes/mmc3.lua b/host/scripts/nes/mmc3.lua
index 327eda1..d272cc0 100644
--- a/host/scripts/nes/mmc3.lua
+++ b/host/scripts/nes/mmc3.lua
@@ -515,9 +515,9 @@ local function process(process_opts, console_opts)
 	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 ramdumpfile = process_opts["dumpram_filename"]
 	local writeram = process_opts["writeram"]
-	local ramwrite_filename = process_opts["writeram_filename"]
+	local ramwritefile = process_opts["writeram_filename"]
 
 	local rv = nil
 	local file 
diff --git a/host/scripts/nes/mmc4.lua b/host/scripts/nes/mmc4.lua
index f965dd1..0843be5 100644
--- a/host/scripts/nes/mmc4.lua
+++ b/host/scripts/nes/mmc4.lua
@@ -457,9 +457,9 @@ local function process(process_opts, console_opts)
 	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 ramdumpfile = process_opts["dumpram_filename"]
 	local writeram = process_opts["writeram"]
-	local ramwrite_filename = process_opts["writeram_filename"]
+	local ramwritefile = process_opts["writeram_filename"]
 
 	local rv = nil
 	local file 
diff --git a/host/source/inlprog.c b/host/source/inlprog.c
index d2c3809..4b0f1ba 100644
--- a/host/source/inlprog.c
+++ b/host/source/inlprog.c
@@ -307,19 +307,19 @@ int main(int argc, char *argv[])
 	// 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)) {
+		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) {
+		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) {
+		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;
 		}