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Remove io_byte field; rename to apple2dd

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This commit is contained in:
Peter Evans 2017-12-14 22:13:39 -06:00
parent 0162544fa6
commit 58137cb2a0
1 changed files with 23 additions and 8 deletions
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31
include/apple2.disk_drive.h
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@ -4,7 +4,7 @@
/*
* These are the possible modes a drive can be in.
*/
enum apple2_disk_drive_mode {
enum apple2dd_mode {
DD_READ,
DD_WRITE,
};
@ -26,6 +26,21 @@ typedef struct {
*/
int track_pos;
/*
* This is a weirder one, because while DOS cares about sectors, we
* don't really. We just need to know how to find the right position
* to work with in the disk image.
*
* Each track has 16 sectors, and each sector has 256 bytes. We can
* then say that each track is 4k (4,096) bytes large. So while our
* track_pos can tell us which 4k chunk we're in, the sector_pos has
* to tell us where we are _within_ the track. Again -- we don't
* care about the sector number, really. So the sector_pos field is
* tracking the byte offset from the beginning of the track, such
* that 0 ≤ sector_pos < 4096.
*/
int sector_pos;
/*
* The data field is where the actual byte data for the image is
* kept.
@ -57,13 +72,13 @@ typedef struct {
* that you can enable or disable on the drive.
*/
bool write_protect;
} apple2_disk_drive;
} apple2dd;
extern apple2_disk_drive *apple2_disk_drive_create();
extern void apple2_disk_drive_free(apple2_disk_drive *);
extern void apple2_disk_drive_step(apple2_disk_drive *, int);
extern void apple2_disk_drive_set_mode(apple2_disk_drive *, int);
extern void apple2_disk_drive_turn_on(apple2_disk_drive *, bool);
extern void apple2_disk_drive_write_protect(apple2_disk_drive *, bool);
extern apple2dd *apple2dd_create();
extern void apple2dd_free(apple2dd *);
extern void apple2dd_step(apple2dd *, int);
extern void apple2dd_set_mode(apple2dd *, int);
extern void apple2dd_turn_on(apple2dd *, bool);
extern void apple2dd_write_protect(apple2dd *, bool);
#endif