Musings and comments about our common interest
I have prepared an early HP41C (serial number 1944A...). I write it here because initially I put it on sale with not good enough pictures, but now it comes in all its beauty.
It is so early a model that it has tall keys and the original, early metal plate keyboard surface (not textured plastic)
For some time we have left aside the blog, due to lots of repairs and CL installations. Then comms are postponed and the urgent orders come forward
So we have not informed here that there is now the possibility of integrating a Time Module in the HP41CL. This saves the user a 120-140 € module, and a slot.
All the rest of characteristics and features of the CL are still there, while the list of included modules is continuing to grow. Also many of the modules designed by Angel Martin have been reviewed, debugged and improved.
A short one (very far from the long posts involving repairing manuals):
One of my sons is learning to do divisions, and he has to practice. So I took the HP41CL to generate random divisions. I always have among the modules virtually plugged in the system Sandmath 4x4, which has the function RND (I think it is there - the only thing for sure is that having only the advantage pack and Sandmath, it DOES work), so I made this short program in all of 1 minute, plus other 15 seconds to assign it to a key:
1 LBL RAND
It stores a 5 digit number in X and a 2 digit in Y. My son can execute it and press x<>y in order to get the divisor too.
There is no way I could get a faster solution with a computer or any other more modern calculator!!
We have now 3 more circuits to be built on HP41CV bodies. These were just uploaded with the very latest versions of all modules.
The news is that we have a Time Module available to create the ultimate classic calculator.
The first order will be shipped with an original HP41C oversized vinyl case. Next units will go with leather-like new cases.
For those that are not aware of the capabilities of this machine, here are some of its features:
Please see all options in the HP41CL page. Prices start at 625 EUR.
The users of the hp41c machines need to be careful while taking their calculators on a trip. The machine is sensitive to vibrations, and doesn’t have as big a capacitor as the original one (which could allow you to change batteries taking your sweet time, and all the programs and configuration would still remain). It has happened already a couple of times that a calculator sent has lost its configuration, or even wouldn’t start.
We reviewed the case in this blog issue, but we think it is relevant - when you buy such a expensive calculator, you need to be sure to be able to revive it when it has a hiccup!
The question comes then on how to initialize the calculator. There are different possible initializations, but in have to confess that this is beyond my knowledge. The only thing that I want to make sure of, is that library #4 is installed in page #4. This library comprises several subroutines that are used by a number of modules programmed and/or compiled by Angel Martin. Basically these are the sole modules being developed today, and include an interesting clone of the hp16c, the extremely powerful Sandmath modules (which turn the hp41 into a very powerful mathematical machine), the advanced matrix ROM, the Complex Functions ROM, the matrix/polynomial ROM and other operating systems and toolbox-oriented ROMs. The interesting thing is that it doesn’t use any of the typical ports, so you are free to use all your modules (also taking into account that, if you plug in the real Time module, it doesn’t occupy the corresponding pages since its functions are already in memory in the hp 41cl)
Due to the complexity of getting the right shipment option for the hp41c battery repair kit (it depends on the stage you are in the order), we have decided to increase the price a little and include the shipping cost in it. This is particularly beneficial for those out of the European Union, since they save also VAT.
Now the ordering should be much easier. Orders have begun to come in, so it must be working better than before!
On another subject: during this week end, we assembled 2 new JP 41CL with the latest circuit, including the new modules from Systemyde and Angel Martin (namely the HP16c function set clone). So, there are now 1 tall keys, satin-keyboard HP41c and 2 low keys, rugged keyboard HP41c. On demand, we could assemble too an HP41c - but personally I have always preferred the white border of the c models than the yellow of the CV or CX. Screen and keyboard are top-notch in all cases. No original box available, sorry!
There are also two Time modules available, one with English manual, and the other with French manual and original box. These are sold at 120 € if demanded with any of the HP41CLs, 150 € otherwise.
(As a comment aside, some customers complain that they can find some items cheaper in internet - but please compare apples with apples: our products bear 21% VAT on the sales price, provided that the customer sits in the European Union - hence a significant difference! Most second-hand dealers in the action sites don't charge VAT (and don't pay charge VAT to their tax administration!)
To be honest with you, athough my HP41CL has the serial connector, I have never used it. I frear too much to block the calculator - and it is a quite expensive machine!
But I have read today in Monte Dalrymple's site that he is preparing a "Flashing the HP41CL for Dummies" document. That'll be ideal for those of us who are not microprocessor programmers like Monte, Diego and others! I look forward to be able to add more images to my system. The good thing is that you can know what's the latest module you have because you can test the modules based on the recording date in Monte's manual - the first missing will show "nonexistent" on your screen - and you need to load modules from that date on"
There are three modules coming our way, with the latest modules as explained in the previous blog installment.
All of them have been loaded this week by Systemyde, so the owner will enjoy the very latest modules.
The one I am looking forward to is the HP16c Emulator module. I am not doing assembler, but once I did, so I was used to move figures from decimal to HEX and even sometimes to binary. But to be true, at that time we were using 8 bit words and 16 bit registers and addresses, so you can guess that we’re in the very first eighties!
This new module includes support for words of up to 64 bit - which is 8 of the old bytes! Even the HP41c registers were 1 byte shorter!
Monte (Systemwide “factotum”) told me that he uses it already, and defied me to use myself.
You can see the manual here:
This module makes use of the Library#4 created also by Angel Martín
Another day we’ll discuss the functions of Library #4 !
There are new images and modification to old images in the memory of the HP41CL processor.
Monte told me that Angel Martin had modified some of their modules. I hope he has changed the behavior of the %T function in Sandmath - at least that was the plan. But there are also some new modules.
You can see the list of modules and their position in the system memory in the official memory reference of the HP41CL. you can find it here:
The new modules created are:
And changes on the Focal assembly ROM, Sandmath 44, the memory functions ROM YFNF, the ubiquitous Library–4, the 41CL Library functions, the Flash YCRC database and, of course, the 41CL Image database.