/* System E stuff */ extern VIDEO_UPDATE(megatech_bios); extern VIDEO_UPDATE(megatech_md_sms); extern DRIVER_INIT( megatech_bios ); extern MACHINE_RESET(megatech_bios); extern MACHINE_RESET(megatech_md_sms); extern VIDEO_EOF(megatech_bios); extern VIDEO_EOF(megatech_md_sms); extern READ8_HANDLER( sms_vcounter_r ); extern READ8_HANDLER( sms_vdp_data_r ); extern WRITE8_HANDLER( sms_vdp_data_w ); extern READ8_HANDLER( sms_vdp_ctrl_r ); extern WRITE8_HANDLER( sms_vdp_ctrl_w ); extern void init_for_megadrive(running_machine *machine); extern void segae_md_sms_stop_scanline_timer(void); extern READ8_HANDLER( md_sms_vdp_vcounter_r ); extern READ8_HANDLER( md_sms_vdp_data_r ); extern WRITE8_HANDLER( md_sms_vdp_data_w ); extern READ8_HANDLER( md_sms_vdp_ctrl_r ); extern WRITE8_HANDLER( md_sms_vdp_ctrl_w ); extern WRITE8_HANDLER( sms_sn76496_w );