diff --git a/hash/gbcolor.xml b/hash/gbcolor.xml
index 4295953ac07..1ebfbf1b9e5 100644
--- a/hash/gbcolor.xml
+++ b/hash/gbcolor.xml
@@ -26511,7 +26511,7 @@ license:CC0
-
+
@@ -26525,10 +26525,23 @@ license:CC0
-
+
-
+
+
+
+
+
+
+ Dragon Ball Z III 2002 Fighting
+ 200?
+ Sintax
+
+
+
+
+
diff --git a/src/devices/bus/gameboy/ntnew.cpp b/src/devices/bus/gameboy/ntnew.cpp
index 8dced95ccba..6df635c6ad0 100644
--- a/src/devices/bus/gameboy/ntnew.cpp
+++ b/src/devices/bus/gameboy/ntnew.cpp
@@ -4,6 +4,19 @@
Memory controller used for newer NT/Makon games
+ Appears to start in a mode similar to Nintendo MBC3, with a fixed 16 KiB
+ ROM bank at 0x0000 and a switchable 16 KiB ROM bank at 0x4000, but allows
+ switching to a mode with selectable 8 KiB ROM banks at 0x4000 and 0x6000.
+
+ It isn't clear how many static RAM pages are actually supported. Many
+ cartridges included 32K*8 static RAMs despite the headers declaring smaller
+ sizes and the games using no more than 8 KiB. The maximum supported ROM
+ size is also unknown.
+
+ Pretty much everything here is guessed based on the games' behaviour. The
+ exact address ranges the memory controller responds to are unknown. There
+ may be additional features that are not emulated.
+
***************************************************************************/
#include "emu.h"
@@ -105,7 +118,7 @@ void ntnew_device::device_reset()
void ntnew_device::enable_ram(offs_t offset, u8 data)
{
// TODO: what range actually triggers this, and does it still trigger RAM enable?
- if (((offset & 0xff00) == 0x1400) & (0x55 == data))
+ if (((offset & 0x1f00) == 0x1400) & (0x55 == data))
{
LOG("%s: 8K ROM banking enabled\n", machine().describe_context());
m_bank_8k = 1U;
@@ -129,7 +142,7 @@ void ntnew_device::bank_switch_rom(offs_t offset, u8 data)
if (m_bank_8k)
{
// TODO: what ranges does the controller actually respond to?
- switch (offset & 0xff00)
+ switch (offset & 0x0f00)
{
case 0x0000:
if (!(data & 0xfe))