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-rw-r--r--src/mame/drivers/zx.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mame/drivers/zx.cpp b/src/mame/drivers/zx.cpp
index 521dcaa6356..2f73066382e 100644
--- a/src/mame/drivers/zx.cpp
+++ b/src/mame/drivers/zx.cpp
@@ -384,6 +384,7 @@ static MACHINE_CONFIG_DERIVED( ts1000, zx81 )
/* internal ram */
MCFG_RAM_MODIFY(RAM_TAG)
MCFG_RAM_DEFAULT_SIZE("2K")
+ MCFG_RAM_EXTRA_OPTIONS("1K,16K,32K,48K")
MACHINE_CONFIG_END
static MACHINE_CONFIG_DERIVED( ts1500, ts1000 )