One of us

[LinusSch]

(11-16-2024 12:25 AM)c3d Wrote:  DB48x has most of the features of the HP16C. One-complement is not really there yet, but I doubt it's used that much these days.

How can we make it more useful to you? Maybe some user-mode keyboard that would be specifically for based numbers?

I don't have a need for 1's complement but I do have a need for 2's complement. Poking around in the web simulator, 0.8.4, it seems to be unsigned only for now? All ones doesn't give me a negative real and trying to convert -1 to binary gives me RealToBinary error: Bad argument type.

As A1 mentioned, masks (which might be easy to do somehow with the functionality already in there but I don't know this stuff that well yet), and more crucially the carry flag.

But when that works, yeah - this is 249 CHF, a set of key assignments and an overlay from being a really good solution for me. Maybe a few good tutorials. You've even got arbitrary bases in there! Wonderful!

While I generally do subscribe to the idea "if it is worth doing, it is worth overdoing", the maximum word size of 262144 bits may be a bit much. I tried to run not on a 0 and I ran out of memory. Maybe that is a web simulator limitation, though.

[AnnoyedOne]

(11-16-2024 10:22 AM)LinusSch Wrote:  ...and more crucially the carry flag.

FYI I'm thinking of writing/documenting, and publishing here, a 16C program to implement a 63-bit LFSR (Linear Function Shift Register) or PRNG (pseudo random number generator) to illustrate some 16C features--including the carry bit, masks, and logical operations.

It is only an idea.

A1

[LinusSch]

(11-16-2024 01:37 PM)AnnoyedOne Wrote:  

(11-16-2024 10:22 AM)LinusSch Wrote:  ...and more crucially the carry flag.

FYI I'm thinking of writing/documenting, and publishing here, a 16C program to implement a 63-bit LFSR (Linear Function Shift Register) or PRNG (pseudo random number generator) to illustrate some 16C features--including the carry bit, masks, and logical operations.

It is only an idea.

A1

FYI, it is a good idea

[AnnoyedOne]

(11-16-2024 02:21 PM)LinusSch Wrote:  FYI, it is a good idea

Thank you.

It's coming (I've started) . As is Christmas

https://www.hpmuseum.org/forum/thread-22711.html

A1

[AnnoyedOne]

(11-16-2024 10:22 AM)LinusSch Wrote:  I don't have a need for 1's complement but I do have a need for 2's complement.

1's complement = NOT
2's complement = NOT + 1

If you have one you have the other

A1

[battlecoder]

(11-16-2024 01:37 PM)AnnoyedOne Wrote:  

(11-16-2024 10:22 AM)LinusSch Wrote:  ...and more crucially the carry flag.

FYI I'm thinking of writing/documenting, and publishing here, a 16C program to implement a 63-bit LFSR (Linear Function Shift Register) or PRNG (pseudo random number generator) to illustrate some 16C features--including the carry bit, masks, and logical operations.

It is only an idea.

A1

That's pretty neat! One of the first programs I wrote on my (emulated) 16C was a PRNG, but I used a simpler, massively less impressive, and absolutely trivial, LCG.

[c3d]

(11-16-2024 10:22 AM)LinusSch Wrote:  

(11-16-2024 12:25 AM)c3d Wrote:  DB48x has most of the features of the HP16C. One-complement is not really there yet, but I doubt it's used that much these days.

How can we make it more useful to you? Maybe some user-mode keyboard that would be specifically for based numbers?

I don't have a need for 1's complement but I do have a need for 2's complement. Poking around in the web simulator, 0.8.4, it seems to be unsigned only for now? All ones doesn't give me a negative real and trying to convert -1 to binary gives me RealToBinary error: Bad argument type.

Both issues are fixed in 0.8.6, released today.

Quote:As A1 mentioned, masks (which might be easy to do somehow with the functionality already in there but I don't know this stuff that well yet), and more crucially the carry flag.

Masks seem easy enough to implement. Bit count (#B) is planned but not there yet. The carry and out of range flags are also quite easy to add.

Quote:But when that works, yeah - this is 249 CHF, a set of key assignments and an overlay from being a really good solution for me. Maybe a few good tutorials. You've even got arbitrary bases in there! Wonderful!

The idea of DB48x is to be a platform for future declinations that would differ from the main platform mostly in the default key assignments and library functions. Having a DB12x and DB16x seems easy enough.

Quote:While I generally do subscribe to the idea "if it is worth doing, it is worth overdoing", the maximum word size of 262144 bits may be a bit much. I tried to run not on a 0 and I ran out of memory. Maybe that is a web simulator limitation, though.

Run the simulator with the -m option ;-)

Although it works quickly for computations, but quite slowly for display, something that I need to optimize.