I.1 AESVARS

typedef struct
{
     int32_t magic;                 /* Has to be 0x87654321       */
     void *membot;                  /* End of the AES variables   */
     void *aes_start;               /* Start address              */
     int32_t magic2;                /* Is 'MAGX' or 'KAOS'        */
     int32_t date;                  /* Creation date              */
     void (*chgres)(int16_t res, int16_t txt);  /* Change resolution */
     int32_t (**shel_vector)(void); /* Resident desktop           */
     int8_t *aes_bootdrv;           /* Booting will be from here  */
     int16_t *vdi_device;           /* Driver used by AES         */
     void *reservd1;                /* Reserved                   */
     void *reservd2;                /* Reserved                   */
     void *reservd3;                /* Reserved                   */
     int16_t version;               /* Version (0x0201 is V2.1)   */
     int16_t release;               /* 0=alpha..3=release         */
} AESVARS;

Note: These variables are READ-ONLY!

The first three variables are also present under TOS, and can be obtained there from the operating system header. The vdi_device component is superfluous as of MagiC 2.0 as one gets the device number in a MultiTOS-compatible way with appl_getinfo (opcode 2). The routine for changing the resolution (chgres) expects in register d2 an optional Falcon-mode (as int16_t).