MiSTer FPGA Forum

Alkadian wrote: ↑Mon Feb 22, 2021 10:36 am

wark91 wrote: ↑Sun Feb 21, 2021 7:11 pm Ok.
You just load the first floppy or did you reset ?
The reset doesn't seem to work correctly.
The only way I have found to work every-time after tested the floppies on emulator is :
- Restart the Mister
- Start the core Zet98
- Load the first floppy

@wark91,

Many thanks for your help, I got it working at the end!

ShyTalk wrote: ↑Mon May 24, 2021 9:03 pm

Alkadian wrote: ↑Mon Feb 22, 2021 10:36 am

wark91 wrote: ↑Sun Feb 21, 2021 7:11 pm Ok.
You just load the first floppy or did you reset ?
The reset doesn't seem to work correctly.
The only way I have found to work every-time after tested the floppies on emulator is :
- Restart the Mister
- Start the core Zet98
- Load the first floppy

@wark91,

Many thanks for your help, I got it working at the end!

Hi, Do you mind confirming how you got this to work in the end? I seem to be stuck at the same point as you but I can't seem to crack this:

1. I have my 5 Rusty .d88 files (Game disks A, B, C, Opening, System);
2. I run the core;
3. Ensure that the core settings are "standard";
4. I bring up the OSD and select "FDD0 *.D88 and select Rusty (System Disk);
5. I bring up the OSD again and select "FDD1 *.D88 and select Rusty (Opening Disk)
6. I click Reset and the Game System Disk seems to begin to load;
7. After a few moments the screen just goes blank

Have I missed something or could it be my Neo Kobe version of the roms do you think?

Thanks for any assistance!

saibayadon wrote: ↑Mon May 24, 2021 6:04 am I've set up everything and have managed to run some games. CRW (with the English patch) is booting perfectly when using D88 and loading both A and B disks. Chitty Chitty Train errors out with a "I/O Error" and a constant beep when trying to boot it. I'll continue testing games I have.

softtest9 wrote: ↑Sun Jan 09, 2022 11:28 am Is the floppy code on the FPGA or ARM side? If it's on the ARM side, perhaps a software developer could take a look. Emulators generally support multiple formats and some of them are open-source.

pgimeno wrote: ↑Mon Feb 22, 2021 10:04 am Since I can't run that disk tool, I made a converter from FDI to D88 in Python, based on my previous DIM to D88 converter. Usage is:

python fdi2d88.py <input file> <output file>

TimeWarpGamer wrote: ↑Sun Mar 27, 2022 8:38 pm Huge props for the Python script. Thanks so much for sharing. First try it worked great, then I tried Hellhound and Phalanx .dim files and got an error: "raise Exception('Data present in a track number not supported by D88, aborting'). I guess some .dim games cannot be converted to .d88?

puu wrote: ↑Thu Jan 13, 2022 8:58 am

softtest9 wrote: ↑Sun Jan 09, 2022 11:28 am Is the floppy code on the FPGA or ARM side? If it's on the ARM side, perhaps a software developer could take a look. Emulators generally support multiple formats and some of them are open-source.

FDD code is on FPGA.
The ARM side only inputs and outputs files, and the FPGA expands the .d88 image to the track image.
The .d88 format is used because it can handle formats where the sector size is different for each track or there are multiple size sectors in the track.

saibayadon wrote: ↑Mon May 24, 2021 6:04 am First of all, thanks puu for the hard work. It's incredible that this is already booting games.

I've set up everything and have managed to run some games. CRW (with the English patch) is booting perfectly when using D88 and loading both A and B disks.

Hey, I'm trying to see if I can create a SASI HDF file from the neko project II emulator. Can any of the below HD types be converted? Or is there some other way to create this type of HD?

puu wrote: ↑Fri Jul 29, 2022 4:20 pm Because in the PC-98 of the 8086 CPU era, the HDD was SASI or SCSI, but there are many types of host adapters including third parties, and the SCSI on hand is made by a third party and only a limited number of people can obtain the BIOS for this. Also, I don't have a genuine NEC SASI / SCSI host adapter, so I can't get the BIOS.

Hi, does this runs also on consumer CRT?

Jegriva wrote: ↑Thu Nov 02, 2023 6:09 pm

Hi, does this runs also on consumer CRT?

I can get a stable image using modelines from PC-88 (which in turn were borrowed from ao486) , but it's squashed - even after applying 16:9 ratio.

On PC-88 it's the same, but this core has the Aspect Ratio: Full Screen option which helps to alleviate this problem.

Try at your own risk:

[Zet98]
direct_video=0
vga_scaler=1
vsync_adjust=2
vscale_mode=3
video_mode=1280,159,140,248,240,11,0,19,29568

Does anybody have a list of game recommendations that work on the current pc98 core?

puu wrote: ↑Fri Jul 29, 2022 4:20 pm

Unfortunately PC-98core does not yet support HDD.
Because in the PC-98 of the 8086 CPU era, the HDD was SASI or SCSI, but there are many types of host adapters including third parties, and the SCSI on hand is made by a third party and only a limited number of people can obtain the BIOS for this. Also, I don't have a genuine NEC SASI / SCSI host adapter, so I can't get the BIOS.
Later, the IDE was installed in the PC-98, but by that time the CPU was already in the 486 era, and the DISK BIOS is included in the system BIOS, but the CPU of this core uses instructions that cannot be used in the 8086. Cannot be executed.
However, I cannot support it because I do not have the ability to create a SASI / SCSI BIOS.

Thank you for your great work on all this classic Japanese comuters! Its a shame, though, that no HDDs are supported. I think this really holds back more people from getting into it, because it seems that especially translated games + games with extras, etc. are distributed as Hard Disk image.
I didn't exactly understand what is holding you back here - is it just a question of getting a genuine NEC host adapter? Or is the problem dumping the BIOS? I would be willing to buy a controller and an EPROM programmer, if that would be of any help!

Hey puu I use the DE0-CV version and would like to take a look at the FDD code to modify it to work with the IDE->SASI bios but couldn't find the code that runs in NIOS anywhere, do you know where it is?

puu, are there any plans to implement EGC (Enhanced Graphic Charger)?

I believe puu is focusing on FM-Towns and won't be developing the PC-98 core anytime soon.

Would be cool if this core came out eventually.