void z80_reset(level_t level);
void z80_reset_pulse(void);
void z80_busreq(level_t level);
-void z80_write_block(uint8_t *src, uint32_t dest, uint32_t length);
+void z80_write_block(const __flash uint8_t *src, uint32_t dest, uint32_t length);
int z80_stat_halt(void);