HP-25 Emulators suggestion
|
02-09-2024, 09:46 PM
Post: #21
|
|||
|
|||
RE: HP-25 Emulators suggestion
Sounds like it may be a limitation in building an emulator around a slavish interpretation of the microcode.
If you drop that, it would be easy to build a 25 with subroutines, or any other feature you wish. Or completely new machines. -J PS: I've wanted the same - but I cheat I use an HP33C emulator! |
|||
02-09-2024, 11:02 PM
Post: #22
|
|||
|
|||
RE: HP-25 Emulators suggestion
(02-09-2024 09:46 PM)John Garza (3665) Wrote: Sounds like it may be a limitation in building an emulator around a slavish interpretation of the microcode. Yes, the HP-33C is basically the HP-25 PLUS subroutines! Namir |
|||
02-25-2024, 06:23 AM
Post: #23
|
|||
|
|||
RE: HP-25 Emulators suggestion
(02-07-2024 01:41 AM)Dave Britten Wrote: Well, if there's 16 free opcodes, that would be enough to add a few: What about a simple GSB 49 instruction. A GTO nn placed there would enable a subroutine just about anywhere in memory. cheers Tony |
|||
02-25-2024, 02:09 PM
Post: #24
|
|||
|
|||
RE: HP-25 Emulators suggestion
(02-25-2024 06:23 AM)teenix Wrote:(02-07-2024 01:41 AM)Dave Britten Wrote: Well, if there's 16 free opcodes, that would be enough to add a few: Yeah, that would be even better. Just add that and RTN, with probably only a single subroutine return level supported - is anybody going to try to do recursion on a 25? Of course, there's still the issue of making space in ROM to implement it! |
|||
02-26-2024, 12:09 AM
Post: #25
|
|||
|
|||
RE: HP-25 Emulators suggestion
Hi all,
I implemented the GSB RTN on my emulator/simulator for the HP-25 and HP-25C GSB 49 is implemented by pressing [g][GTO] RTN is implemented by pressing [g][BST] The new codes are shown on the LED display during program entry, and SST or R/S down. Doing a RTN without a matching GSB will jump to step .00 and stop the program Multiple GSB's will overwrite the previous RTN step. An example program... Code:
When R/S is pressed, the X result = 24. I have uploaded the updated CCE33, HP-25 and HP-25C emulator downloads at teenix.org cheers Tony |
|||
02-26-2024, 08:31 PM
(This post was last modified: 02-26-2024 08:37 PM by Matt Agajanian.)
Post: #26
|
|||
|
|||
RE: HP-25 Emulators suggestion
(02-06-2024 06:07 PM)Dave Britten Wrote: RPN-25 from CuVee Software appears to do precisely that: That’d be my vote. This is not only a supercharged 25, but a turbo supercharged calc. Labels, user defined softkey capability (on the top), some HP-41C programs in the app library, over 50 flags, conditional test extensions, several indirect addressing capabilities, full set of complex number functions, including hyperbolics, trig, natural & common logs, etc. Have a go and take a look. |
|||
02-26-2024, 10:20 PM
Post: #27
|
|||
|
|||
RE: HP-25 Emulators suggestion
Nice. I wonder if anyone has actually typed in 999 program steps. Labels or not, that would be something I like that you still have the original in there somewhere.
It's hard to imagine a HP-9100 with an Intel Core 9, math processor, gigs of RAM, color screen, terabyte drive and a laser printer sitting on top. Even though I fiddle with them a bit, I like the originals. They have limitations by today's standards but that is what they are and is part of their charm. cheers Tony |
|||
02-27-2024, 02:14 AM
Post: #28
|
|||
|
|||
RE: HP-25 Emulators suggestion
(02-26-2024 10:20 PM)teenix Wrote: Nice. I wonder if anyone has actually typed in 999 program steps. Labels or not, that would be something I like that you still have the original in there somewhere. Now there's a good project if you get bored: write a bare-metal HP 25 reimplementation for x86 systems. No Windows or anything, just boot straight to a direct port of HP 25 microcode (with LOTS more RAM and speed available). |
|||
« Next Oldest | Next Newest »
|
User(s) browsing this thread: 11 Guest(s)