Defines starting with `r' in src

• RB src/custom.c:4036
• rdbmnt src/filesys.c:3402
• RED src/gfxutil.c:19
• reset_card src/expansion.c:101
• RL src/custom.c:4038
• rom_16bit src/expansion.c:113
• rom_4bit src/expansion.c:111
• rom_8bit src/expansion.c:112
• rom_binddrv src/expansion.c:117
• rom_card src/expansion.c:46
• rom_install src/expansion.c:116
• ROM_KEY_NUM src/rommgr.c:346
• rom_never src/expansion.c:115
• RTC_D_ADJ src/cia.c:32
• RTC_D_BUSY src/cia.c:34
• RTC_D_HOLD src/cia.c:35
• RTC_D_IRQ src/cia.c:33
• RTC_E_INTR src/cia.c:38
• RTC_E_MASK src/cia.c:39
• RTC_E_t0 src/cia.c:37
• RTC_E_t1 src/cia.c:36
• RTC_F_24_12 src/cia.c:41
• RTC_F_RSET src/cia.c:43
• RTC_F_STOP src/cia.c:42
• RTC_F_TEST src/cia.c:40
• RW src/custom.c:4037