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AT ESDI: Bring IDENTIFY results in line with the real hardware, closes #5059.

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This commit is contained in:
OBattler
2024-12-24 19:22:55 +01:00
parent 80f5c47221
commit 4297d72a89
1 changed files with 53 additions and 22 deletions
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75
src/disk/hdc_esdi_at.c
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@@ -552,6 +552,29 @@ esdi_read(uint16_t port, void *priv)
return temp; return temp;
} }
/**
* Copy a string into a buffer, padding with spaces, and placing characters as
* if they were packed into 16-bit values, stored little-endian.
*
* @param str Destination buffer
* @param src Source string
* @param len Length of destination buffer to fill in. Strings shorter than
* this length will be padded with spaces.
*/
static void
esdi_padstr(char *str, const char *src, const int len)
{
int v;
for (int i = 0; i < len; i++) {
if (*src != '\0')
v = *src++;
else
v = ' ';
str[i ^ 1] = v;
}
}
static void static void
esdi_callback(void *priv) esdi_callback(void *priv)
{ {
@@ -811,28 +834,36 @@ format_error:
irq_raise(esdi); irq_raise(esdi);
} else { } else {
memset(esdi->buffer, 0x00, 512); memset(esdi->buffer, 0x00, 512);
esdi->buffer[0] = 0x44; /* general configuration */ esdi->buffer[0] = 0x3244; /*
esdi->buffer[1] = drive->real_tracks; /* number of non-removable cylinders */ Soft sectored (0x0004),
esdi->buffer[2] = 0; /* number of removable cylinders */ Fixed drive (0x0040),
esdi->buffer[3] = drive->real_hpc; /* number of heads */ Transfer rate > 5 Mbps but <= 10 Mbps (0x0200),
esdi->buffer[4] = 600; /* number of unformatted bytes/sector */ Data strobe offset option (0x1000),
esdi->buffer[5] = esdi->buffer[4] * drive->real_spt; /* number of unformatted bytes/track */ Track offset option (0x2000).
esdi->buffer[6] = drive->real_spt; /* number of sectors */ */
esdi->buffer[7] = 0; /*minimum bytes in inter-sector gap*/ if (drive->real_spt >= 26)
esdi->buffer[8] = 0; /* minimum bytes in postamble */ esdi->buffer[0] |= 0x0008; /* Not MFM encoded. */
esdi->buffer[9] = 0; /* number of words of vendor status */ esdi->buffer[1] = drive->real_tracks; /* Fixed cylinders - the BIOS lists 2 less. */
/* controller info */ esdi->buffer[2] = 0; /* Removable cylinders. */
esdi->buffer[20] = 2; /* controller type */ esdi->buffer[3] = drive->real_hpc; /* Heads. */
esdi->buffer[21] = 1; /* sector buffer size, in sectors */ esdi->buffer[5] = 600; /* Unformatted bytes per sector. */
esdi->buffer[22] = 0; /* ecc bytes appended */ esdi->buffer[4] = esdi->buffer[5] * drive->real_spt; /* Unformatted bytes per track. */
esdi->buffer[27] = 'D' | ('W' << 8); esdi->buffer[6] = drive->real_spt; /* Sectors per track - the BIOS lists 1 less. */
esdi->buffer[28] = '0' | ('1' << 8); esdi->buffer[7] = 3088; /* Bytes in inter-sector gap. */
esdi->buffer[29] = '7' | ('0' << 8); esdi->buffer[8] = 11; /* Byce in sync fileds. */
esdi->buffer[30] = '-' | ('V' << 8); esdi->buffer[9] = 0xf; /* Number of vendor unique words. */
esdi->buffer[31] = 'E' | ('S' << 8); /* Serial Number */
esdi->buffer[31] = 0 | ('1' << 8); esdi_padstr((char *) (esdi->buffer + 10), "00000000000000000000", 20);
esdi->buffer[47] = 0; /* sectors per interrupt */ /* Controller information. */
esdi->buffer[48] = 0; /* can use double word read/write? */ esdi->buffer[20] = 3; /* Buffer type. */
esdi->buffer[21] = 64; /* Buffer size in 512-byte increments. */
esdi->buffer[22] = 4; /* Bytes of ECC. */
/* Firmware */
esdi_padstr((char *) (esdi->buffer + 23), "REV. A5", 8);
/* Model */
esdi_padstr((char *) (esdi->buffer + 27), "WD1007V", 40);
esdi->buffer[47] = 1; /* Sectors per interrupt. */
esdi->buffer[48] = 0; /* Can use DWord read/write? */
esdi->pos = 0; esdi->pos = 0;
esdi->status = STAT_DRQ | STAT_READY | STAT_DSC; esdi->status = STAT_DRQ | STAT_READY | STAT_DSC;
irq_raise(esdi); irq_raise(esdi);