Differences

This shows you the differences between two versions of the page.

--- x68000:hard_disk [2008/10/06 14:35] – computolio
+++ x68000:hard_disk [2023/07/04 17:49] (current) – [Internal HD connector] TD-Linux
@@ Line 3: / Line 3: @@
 ==== External HD connector ====
-All models of X68000 (even SASI-based models) seem to have standard pinouts for the external hard disk connector:
+All X68000s (even the SASI-based models) seem to have standard pinouts for the external hard disk connector:
-*Original model, Ace, Expert, Pro: [[http://www.gamesx.com/hwb/co_ScsiExternalCentronics50.html|Centronics 50-pin]] with /ATN and PARITY unconnected.
+ * Original model, Ace, Expert, Pro: [[http://www.gamesx.com/hwb/co_ScsiExternalCentronics50.html|Centronics 50-pin]] with /ATN, PARITY and Termination Power unconnected.
-*Super, XVI: Standard [[http://www.gamesx.com/hwb/co_ScsiExternalCentronics50.html|Centronics 50-pin]].
+ * Super, XVI: Standard [[http://www.gamesx.com/hwb/co_ScsiExternalCentronics50.html|Centronics 50-pin]].
-*Compact XVI, X68030, X68030 Compact: [[http://www.gamesx.com/hwb/co_ScsiExternalHiDSub.html|DH-50]].
+ * Compact XVI, X68030, X68030 Compact: [[http://www.gamesx.com/hwb/co_ScsiExternalHiDSub.html|High-Density Centronics 50-pin]].
 ==== Internal HD connector ====
-All X68000 machines have a custom internal hard disk connector. The pinout for the SASI-based machines is as follows:
+All X68000 machines have a custom internal hard disk connector.
+The pinout for the SASI-based machines is as follows:
 ^Pin^Description^Pin^Description^
@@ Line 27: / Line 29: @@
 |  10 | DB7  |  20  |/I/O|
-The pinout for SCSI-based machines:
+The pinout for SCSI-based machines(Taken from http://homepage1.nifty.com/ht_deko/x68ktune.html):
 ^Pin^Description^Pin^Description^
-|  1  | DB0  |  14  |GND|
+|  1  | DB0  |  14  |/ATN|
-|  2  | DB1  |  15  |Unknown(Possibly for the HD access LED)|
+|  2  | DB1  |  15  |GND|
-|  3  | GND  |  16  |/BSY|
+|  3  | GND  |  16  |HD Access LED|
-|  4  | DB2  |  17  |/ACK|
+|  4  | DB2  |  17  |/BSY|
-|  5  | DB3  |  18  |/RST|
+|  5  | DB3  |  18  |/ACK|
-|  6  | DB4  |  19  |/MSG|
+|  6  | DB4  |  19  |GND|
-|  7  | GND  |  20  |/SEL|
+|  7  | GND  |  20  |/RST|
-|  8  | DB5  |  21  |/C/D|
+|  8  | DB5  |  21  |/MSG|
-|  9  | DB6  |  22  |REQ|
+|  9  | DB6  |  22  |/SEL|
-|  10 | DB7  |  23  |/I/O|
+|  10 | DB7  |  23  |GND|
-|  11 | GND  |  24  |/I/O|
+|  11 | GND  |  24  |/C/D|
-|  12 | PARITY |  25  |/I/O|
+|  12 | PARITY |  25  |/REQ|
 |  13 | +5V(Termination power)  |  26  |/I/O|
+The HDD access LED is nonstandard and mapped to pin 34 of the 50-pin internal SCSI connector. Pulling it low turns on the HDD LED. Most standard SCSI HDDs connect this pin to ground, resulting in the HDD LED staying permanently on.