|Re: 71B questions|
Message #9 Posted by Maximilian Hohmann on 19 Aug 2007, 8:17 p.m.,
in response to message #8 by Vincze
I wonder why does it need math module if it has BASIC and calculator built in.
The MATH module adds some additional functions (like matrix calculations) that you would have to program yourself otherwise. But even without this, the calculator has all functions that one really needs.
Also, I not sure I understand IL module. Is that like a IO port? What type of connector does it accept?
Yes, it is a closed-loop serial connection. It has two special kinds of HP-IL connectors (in and out - like MIDI, only that MIDI uses the same connector for everything) that you will find nowhere else.
Lastly, they not all come with card reader? On card reader, is it one use only, or can one overwrite it with new program like disc?
The card reader was an option. It is not really practical, because in the early 80ies, RAM sizes were growing fast and you needed heaps of cards to store the contents of the calculator memory (I think they hold 512 k each). I don't know for sure, because I don't have a card reader in my 71, only one in the '75, but that may be slightly different.
The cards can be overwritten just like floppies. They are very hard to find and are differnt from the '65, '67, '97 and '41 cards, that are all the same and therefore in plenty supply.
Edited: 19 Aug 2007, 8:18 p.m.