MiSTer FPGA Forum

robng15

On a side issue, I have written an FPU core in Silice, a higher-level development language, that can handle double, single and half-precision floating point numbers, not the 80-bit floating point numbers, extended-precision I believe. It easily fits into a ULX3S, mainly due to skipping some rounding modes. As it is for a RISC-V CPU, it doesn't supp...

robng15

The other issue is timings. Most software for the Amiga would be developed to use exact timings for the FPU, which is definitely an added complication.

I am unable to find any information about the maths co-processor in the 3DO graphics chip, so I've no idea what abilities the FPU would need.

robng15

I think the traditional way to implement them is via a microcode ROM that runs through the simpler operations to obtain the required result.

As Risc-V doesn't require them in the fpu I've not had to implement them.

robng15

The 68881 and 68882 are able to perform a lot more operations than Risc-V requires, including remainder, sin, cos, tan, log and pow operations, plus they have the ability to work with packed binary numbers. So there would still be a lot of work required, extended-precision support, which would be the easy part, as well as the more complex operation...

robng15

3DO has an FPU, and I don't believe anyone has done an FPU for any core on Mister? Right? I think creating an FPGA FPU is advanced level. Hi, Whilst not specific to MiSTer, although I do own a fully kitted out one, I have written an FPU for my Risc-V project on the ULX3S. It presently handles conversions integer <-> float, changes in precision, ha...

robng15

I purchased mine directly from Antonio Villena, at https://www.antoniovillena.es/store/product/tty2oled/ although they are out of stock at this instance. Excellent seller, quick processing and dispatch.

robng15

Here is my setup... quite comprehensive now.... 1Tb HDD, ttyoled, mt32-pi... HUGE screen...

IMG_20220918_115428.jpg

IMG_20220918_115421.jpg

robng15

H6rdc0re wrote: ↑Fri Jul 09, 2021 3:51 pm Does anyone know if someone is developing a FPU for the AO486 core?

I have FPU code for add, sub, mul, div and sqrt, plus conversion, using 32 bit, ie, float, not double, and certainly not the 80 bit that would be required. My code could be extended to 80 bit, but would also need all of the extras that the 80x87 requires.

robng15

Thank you.

robng15

Hi all, I have been working on my FPGA programming, presently using a language called Silice to get me started, but have now done some playing in verilog. I have a 'kind of' working j1eforth running on the de10nano using the MiSTer VGA port on the I/O board, communicating via a UART attached to the USER PORT pins. https://github.com/rob-ng15/Silice...

robng15

This one looks interesting too...

http://flopoco.gforge.inria.fr/

robng15

I still have the issue. Tried DOS 6.22 as well. I am beginning to suspect maybe its my version of the game. I did create the image myself. Used your configuration and manually set the sound settings. Still no luck. Might also be that there has begun being a problem with newer cores. I tried the two first release cores and the first one does get a ...

robng15

For Theme Park... I ran the setup from the CD and then modified the files in C:\THEME.CD as follows: SNDSETUP.INF SOUNDFX = SBLAST 220 5 1 MUSIC = SBLAST 330 9 0 THEME.BAT LH SHSUCDHD /F:C:\ISO\THEMPARK.ISO LH SHSUCDX /D:SHSU-CDH @D: @cd D:\game :START REM DOS32A INTRO.EXE -C:/THEME.CD DOS32A MAIN.EXE -cD:/game/ -dC:/THEME.CD/ -l0 @IF ERRORLEVEL 10...

robng15

Did someone get Theme Park running? I am trying the CD version and the intro runs with music and soundfx, but the game wont load, unless I disable soundfx. Tried several different settings. It has an option for both Sound Blaster and SBlaster Compatible. I tried both but no luck. I also tried with SB Pro and SB 16 and it runs with those, except st...

robng15

So did anyone create an excel comptatilbity list with comments yet? Oh yeah, good idea. I have started one here: https://docs.google.com/spreadsheets/d/1qsQ7cRVXbnsBniaUF01tpfuCQgnpBsvpomQ4OiwZpgI/edit?usp=sharing Its set to anyone with the link can edit it, so I will make a backup now and then, but I think there is a revision history on it as wel...

robng15

As of yet, to my knowledge, not immediately, but the blackparrot core according to their GitHub page is 64 bit capable.

robng15

xolod79 wrote: ↑Fri Aug 14, 2020 8:53 pm https://github.com/litex-hub/linux-on-litex-vexriscv

Have done some work on this. Whilst amazing, it sadly doesn't work in the MiSTer environment, just uses the MiSTer hardware. My skills aren't sufficient to work on integration.

robng15

bbond007 wrote: ↑Mon Aug 03, 2020 7:02 am
robng15 wrote: ↑Mon Aug 03, 2020 6:48 am Can I just ask what you used for PPP in this instance? Do we still need to use Trumpet or does the built in winsock work now?
The built in Dial Up Networking for Win95 OSR2 and Trumpet 3.0 for Windows 3.11

Many thanks for your response. Will have to update to OSR2 I guess.

robng15

bbond007 wrote: ↑Mon Aug 03, 2020 12:50 am Windows 95:
Roland Serial MIDI Driver
Dial Up Networking (PPP)

Can I just ask what you used for PPP in this instance? Do we still need to use Trumpet or does the built in winsock work now?

Rob.

robng15

bertnorg wrote: ↑Sun Jul 26, 2020 4:59 pm i was reading through the dev files, for a greater resolution you need the new Bochs SVGABios.
it could be that sorg did some magic to that svgabios file.

I'm using the latest BIOS from the Dev branch, but am happy to believe a different one will be needed.

robng15

i think you need to install videocard drivers
[/quote]

Yeah, have installed drivers on both Win 3.11 and 95.

robng15

I have compiled ao486 dev branch up until 0ee2f22 (posted by RobertPeip this morning). I don't have a FULL Quartus, so I am unable to generate an .rbf, so have to upload the .sof file manually.

With WIN95 I can up the resolution, but not the number of colours.

My .sof file generated as above

robng15

This looks like the patch we've been waiting for. Many thanks to sorgelig and FPGAzumapass!

https://github.com/MiSTer-devel/ao486_M ... 94c36f77fd

robng15

Using

Code: Select all

LH SHSUCDHD /F:C:\ISO\xxx.ISO
LH SHSUCDX /D:SHSU-CDH

start game

LH SHSUCDHD /U

To mount an ISO image for a game.

robng15

Chris23235 wrote: ↑Thu Jul 16, 2020 10:48 am With the ao486_Cache13_9345e87 version several new issues occured for me: I am not able to get expanded memory to work, Windows 95 gives me a protection error on startup and I get no music in X-Wing anymore.

TRY in CONFIG.SYS

Code: Select all

DEVICE=C:\DOS\EMM386.EXE NOEMS X=A000-C7FF I=D000-EFFF

robng15

Can confirm, works perfectly for me. Many CD DOS games up and running.

MiSTer FPGA Forum

Search found 26 matches

Re: Is the Atari Falcon 030 possible in MiSTer?

Re: 3DO

Re: 3DO

Re: 3DO

Re: 3DO

Re: tty2oled Soft&Hardware Add-On (Shows Core based Pictures on a Display)

Re: tty2oled Soft&Hardware Add-On (Shows Core based Pictures on a Display)

Re: Microcomputer Cores Feature Wishlist

Re: Porting a new core

Porting a new core

Re: ao486 core / DE10 potential as a DOS computer

Re: AO486 Compatibility List

Re: AO486 Compatibility List

Re: AO486 Compatibility List

Re: Breakthrough for the ao486 core announced - Cache

Re: 64 bit risc-V

Re: 64 bit risc-V

Re: Why OpenCore Plus UART?

Re: Why OpenCore Plus UART?

Re: Breakthrough for the ao486 core announced - Cache

Re: Breakthrough for the ao486 core announced - Cache

Re: Breakthrough for the ao486 core announced - Cache

Re: Breakthrough for the ao486 core announced - Cache

Re: Using CD images with AO486

Re: Breakthrough for the ao486 core announced - Cache

Re: Using CD images with AO486