okeys got me this prob

when i try to format a 1.44mb disk it seems to only
format the first 9 of the 18 sectors on a track and
the last 9 on the track become invalid mark address or
something and i have NO idea why this is so as the
code seems sound... could one of you take a look
at it and tell me where i'm going wrong??

sorry if the code gets all split up and funky due to the
fido's transport layer.

//
//format.c
// (watcom btw)

#include 
#include 
#include 
#include 
#include 

#pragma pack(1);

#define TRUE    0
#define FALSE   !TRUE
#define MAX_SECTORS     36              // caters UP TO 2.88mb disks

enum
{
    SECTOR_SIZE_128=0,
    SECTOR_SIZE_256,
    SECTOR_SIZE_512,
    SECTOR_SIZE_1024,
    SECTOR_MAX_SIZE
};

void format_track(short track, short head);
void verify_track(short track, short head);
void init_format(void);
void cmos_disktype(void);

short max_sectors;
short max_tracks;
short max_heads;
char verify=FALSE;

struct format_buffer
{
    unsigned char track;
    unsigned char head;
    unsigned char sector;
    unsigned char bytes;
};

struct format_buffer form_buffer[MAX_SECTORS];

void init_format(void)
{
    union REGS inregs, outregs;
    struct SREGS segregs;

    inregs.h.ah=0x18;
    inregs.h.al=max_sectors;
    inregs.h.dl=0;                  // drive A:
    inregs.h.dh=0;
    inregs.h.ch=max_tracks-1;
    inregs.h.cl=max_sectors;
    inregs.x.bx=0;
    int86x(0x13, &inregs, &outregs, &segregs);

    inregs.x.ax=0x0;
    int86x(0x13, &inregs, &outregs, &segregs);
}


void cmos_disktype(void)
{
    char k;

    outp(0x70, 0x10);
    k=inp(0x71)>>4;
    printf("\nCMOS reports disk size is : ");
    switch(k)
    {
        case 1:
            max_sectors=9;
            max_tracks=40;
            max_heads=2;
            printf("360kb\n");
            break;
        case 2:
            max_sectors=15;
            max_tracks=80;
            max_heads= 2;
            printf("1.2mb\n");
            break;
        case 3:
            max_sectors=9;
            max_tracks=80;
            max_heads=2;
            printf("720kb\n");
            break;
        case 4:
            max_sectors=18;
            max_tracks=80;
            max_heads=2;
            printf("1.44mb\n");
            break;
        default:
            printf("UNKNOWN!!\n");
            exit(255);
            break;
    }
    printf("  Number of Heads : %i\nSectors Per Track : %i\n  Tracks
Per Disk : %i\n", max_heads, max_sectors, max_tracks);
}

void main(void)
{
    short track, head;

    max_sectors=18;
    max_heads=2;
    max_tracks=80;
    cmos_disktype();
    printf("\nFormatting a Disk in A:\nPress any key.\n");
    getch();
    init_format();
    for(track=0; track * Origin: Comms Barrier BBS +61.3.9585.1112, +61.3.9583.6119 (3:632/358)

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