name:         HT6576A
function:     Advanced SCSI Chip
package:      PLCC44,44
manufacturer: Holtek

+------------+-----------+----------+----------+
|  1 - DB7B  | 12 - BSS  | 23 - VDD | 34 - REQB|
|  2 - RSTB  | 13 - READY| 24 - D4  | 35 - DBPB|
|  3 - VSS   | 14 - A0   | 25 - D3  | 36 - VSS |
|  4 - BSYB  | 15 - A1   | 26 - D2  | 37 - DB0B|
|  5 - SELB  | 16 - A2   | 27 - D1  | 38 - DB1B|
|  6 - ATNB  | 17 - CSB  | 28 - D0  | 39 - DB2B|
|  7 - RESETB| 18 - IOWB | 29 - MSGB| 40 - DB3B|
|  8 - IRQ   | 19 - IOR  | 30 - C/DB| 41 - DB4B|
|  9 - DRQ   | 20 - D7   | 31 - VSS | 42 - VSS |
| 10 - EOPB  | 21 - D6   | 32 - I/OB| 43 - DB5B|
| 11 - DACKB | 22 - D5   | 33 - ACKB| 44 - DB6 |
+------------+-----------+----------+----------+


This pinout came from the Chipdir:
http://www.chipdir.org/