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Diffstat (limited to 'src/mame/drivers/sg1000a.cpp')
-rw-r--r--src/mame/drivers/sg1000a.cpp6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/mame/drivers/sg1000a.cpp b/src/mame/drivers/sg1000a.cpp
index 9bf178a3a8f..e98326d7a26 100644
--- a/src/mame/drivers/sg1000a.cpp
+++ b/src/mame/drivers/sg1000a.cpp
@@ -488,7 +488,8 @@ MACHINE_CONFIG_START(sg1000a_state::sg1000a)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(sg1000a_state::sg1000ax, sg1000a)
+MACHINE_CONFIG_START(sg1000a_state::sg1000ax)
+ sg1000a(config);
MCFG_CPU_REPLACE("maincpu", SEGA_315_5033, XTAL(3'579'545))
MCFG_CPU_PROGRAM_MAP(program_map)
MCFG_CPU_IO_MAP(io_map)
@@ -496,7 +497,8 @@ MACHINE_CONFIG_DERIVED(sg1000a_state::sg1000ax, sg1000a)
MCFG_SEGACRPT_SET_DECRYPTED_TAG(":decrypted_opcodes")
MACHINE_CONFIG_END
-MACHINE_CONFIG_DERIVED(sg1000a_state::sderby2s, sg1000a)
+MACHINE_CONFIG_START(sg1000a_state::sderby2s)
+ sg1000a(config);
MCFG_CPU_MODIFY("maincpu")
MCFG_CPU_CLOCK(XTAL(10'738'635) / 3)
MCFG_CPU_IO_MAP(sderby2_io_map)