T-Kernel Specification (1.B0.02)

244 CHAPTER 5. T-KERNEL/SM
#define TDN_EVENT (-1) /* RW: event notification message buffer ID */
#define TDN_DISKINFO (-2) /* R: disk information */
#define TDN_DISPSPEC (-3) /* R: display device specification */
RW: read (tk rea dev)/write (tk wri dev) enabled
R: read (tk rea dev) only
TDN EVENT: Event Notification Message Buffer ID
Data type: ID
The ID of the message buffer used for device event notification. Since the system default message
buffer ID is passed in device registration, that ID is set as the initial setting when a driver is
started.
If 0 is set, device events are not notified.
Device event notification is discussed later below.
TDN DISKINFO: Disk Information
Data type: DiskInfo
typedef enum {
DiskFmt_STD = 0, /* standard (HD, etc.) */
DiskFmt_2DD = 1, /* 2DD 720KB */
DiskFmt_2HD = 2, /* 2HD 1.44MB */
DiskFmt_CDROM = 4, /* CD-ROM 640MB */
} DiskFormat;
typedef struct {
DiskFormat format; /* format */
UW protect:1; /* protected status */
UW removable:1; /* removable */
UW rsv:30; /* reserved (always 0) */
W blocksize; /* block size in bytes */
W blockcount; /* total block count */
} DiskInfo;
See the disk driver specification for details.
TDN DISPSPEC: Display Device Specification
Data type: DEV SPEC
typedef struct {
H attr; /* device attributes */
H planes; /* number of planes */
H pixbits; /* pixel bits (boundary/valid) */
H hpixels; /* horizontal pixels */
H vpixels; /* vertical pixels */
H hres; /* horizontal resolution */
H vres; /* vertical resolution */
H color[4]; /* color information */
H resv[6]; /* reserved */
} DEV_SPEC;
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T-Kernel 1.B0.02