The
Topcat series
The Topcat series was build between 1976 and 1977. This series counts 4 desktop calculator models with a build in thermal printer. These calculators also have an rechargeable battery pack.
| Model | Code | Type | Description |  |
|---|---|---|---|---|
| HP-91 | Felix | Scientific | Basic calculator, not programmable |
|
| HP-92 | Bobcat | Business | Basic calculator, programmable |
|
| HP-95C | ? | Scientific | Never released | |
| HP-97 | Kitty Hawk | Scientific | An HP-67
with a thermal printer |
|
| HP-97S | Ricochet | Scientific | An HP-97 with an additional interface. |
The LED display
 |
The picture on the left shows the display of a Topcat series calculator. It looks similar to the display of the Classic series calculators but the digits are larger. The display counts 15 digits. The division is fixed. The first digit is only used for the minus sign. The next 11 digits are used to display the mantissa and the decimal separator. This decimal separator occupies a complete digit. The thirteenth digit displays the sign of the exponent and the last two digits display the exponent itself. |
HP 82033A Battery pack
The battery pack of the Topcat models consists of four C size rechargeable batteries. See also here on my battery page.
HP 82059A Charger
 |
Main Charger. More information about the chargers for the Topcat models can be found here on my battery chargers page. |
HP 82037A Reserve powerpack
The reserve power pack enabled to charge the battery pack outside the calculator.
Topcat series related links: