Alesis HR-16
WARNING!!!
Be carefull with your HR-16 / HR-16B. Some pioneers have fried several devices and recommend using ONLY the EPROM chips.
Datasheet for HR-16 Memory chips
Here a Copy in case of dead link, with comments:
27C040/27C4001 - 4096K (512kb x 8) 100ns CMOS EPROM
RED: risky or less usefull and best avoided
GREEN: all usefull points alter memory read out, effects change with instrument sample chosen
BLUE: outputs: alter audio waveforms and use to bend address pins
| Pin Number | Description |
| 1 | Vpp - Program Supply |
| 2 | A16 - Address Input |
| 3 | A15 - Address Input |
| 4 | A12 - Address Input |
| 5 | A7 - Address Input |
| 6 | A6 - Address Input |
| 7 | A5 - Address Input |
| 8 | A4 - Address Input |
| 9 | A3 - Address Input |
| 10 | A2 - Address Input |
| 11 | A1 - Address Input |
| 12 | A0 - Address Input |
| 13 | Q0 - Data Input/output |
| 14 | Q1 - Data Input/output |
| 15 | Q2 - Data Input/output |
| 16 | Vss - Ground |
| 17 | Q3 - Data Input/output |
| 18 | Q4 - Data Input/output |
| 19 | Q5 - Data Input/output |
| 20 | Q6 - Data Input/output |
| 21 | Q7 - Data Input/output |
| 22 | E - Chip Enable |
| 23 | A10 - Address Input |
| 24 | G - Output Enable |
| 25 | A11 - Address Input |
| 26 | A9 - Address Input |
| 27 | A8 - Address Input |
| 28 | A13 - Address Input |
| 29 | A14 - Address Input |
| 30 | A17 - Address Input |
| 31 | A18 - Address Input |
| 32 | Vcc - Positive Power Supply |