MiSTer FPGA Forum

danielb wrote: ↑Wed Nov 24, 2021 9:52 am Hi,

I received permission to redistribute the OSI C1P version of OSI Invaders from its rescuer, Timothy Musson, so here it is.

D.

Thanks for securing that. It all adds to the experience

danielb wrote: ↑Wed Nov 24, 2021 6:35 pm
I'll post a development version after I clean up the GUI, which always takes longer than the actual development...

D.

danielb wrote: ↑Mon Nov 22, 2021 9:58 pm
No idea. On other systems, prg files are binary files that are injected directly into memory. Could you send me one so I can see what it is?

Srub that. Took a closer look and they are not PRG's at all but text files with .prg extension

danielb wrote: ↑Mon Nov 22, 2021 7:03 pm
Maybe it peeks or pokes some hardware register that isn't supported in the core ...

D.

Dunno

I have PRG files. Could PRG also be made loadable?

Hi, To run OSI Invaders, go into C2P mode, then do a cold reset and start Basic, then do another reset, press "M" for the monitor, and load it. This works on the new version of the core, the old version, WinOSI, and, I believe, the original hardware. D. Thanks. Seeing the instructions everywhere now :oops: Also, there appears to have bee...

An ammendum:
OSI Invaders doesn't load on WinOSI either

Hi Thanks for the update. C1P (Superboard II as you mentioned) is working fine, no problems so far. I can't, however, get anything to load and run in C2P mode. Some programs work okay on WinOSI emulator with CEGMON and all appear to work with SYN600 but I don't seem to be able to get machine code or basic programs to load at all for some reason. Wh...

danielb wrote: ↑Wed Nov 17, 2021 4:39 pm Just a little update: I'm working on a new mode, for the OSI C1P.

I have had some moderate success, but it will be a while before it is ready for testing.

D.

PS. I will also take a look at saving over UART

Sounds interesting

danielb wrote: ↑Mon Nov 15, 2021 2:51 pm
I will definitely take a look at that soon...

D.

Thanks

danielb wrote: ↑Sat Nov 13, 2021 10:00 am Hi,

I just pushed a new official version.

This one has the fixed Scandoubler code, and also a rearranged menu.

D.

Nice to see the improvements are still coming. Thanks.
I'm still holding out for a Saving via UART fix

danielb wrote: ↑Wed Nov 10, 2021 11:50 am .....

Does anyone happen to know how this should work?

Thanks,

D.

I don't, sorry @RedskullDC maybe?
I just wondered whether knowing that SAVE stopped working when multiple baud rate was added might help

danielb wrote: ↑Wed Nov 10, 2021 10:02 am I'll take a look at it. I haven't tried it for a very long time.

Thanks
Is that how it feels?

Hi @danielb
I may be missing something but SAVE via UART appears not to be working. Tried an earlier Build and all was well

Thanks for that

Some enhancements only work with Cegmon. I recently found this repository: https://github.com/sjgray/OSI-monitor-roms , where someone has been reconstructing the source code for the various OSI ROMS. Hopefully, I will be able to find how to patch these ROMs in the same way that I patched Cegmon, so more enhancements will work with them. I had come...

For this version, just details. I think it's mostly finished. Some enhancements only work with Cegmon. I recently found this repository: https://github.com/sjgray/OSI-monitor-roms , where someone has been reconstructing the source code for the various OSI ROMS. Hopefully, I will be able to find how to patch these ROMs in the same way that I patche...

Thanks, You're making a lovely job of this core
Anything else in mind

Okay thanks

Hi, I managed to get 24x24 mode working. In the version that I have at the moment, it replaces the 32x32 mode on the OSI machine, and basically only works with Cegmon, because Cegmon is the only monitor that I know how to patch to change the default screen settings. So, is there any point to adding it to the official version? Every game is written...

I get it now!
Thank you for the link @jca, that helped, and @RedskullDC for the OSI specific reference.

Further in the link you provided: Although the video RAM could store 1024 characters and the actual video RAM was mapped as 32 lines of 32 characters, the actual display was 24 characters across by 24 lines – peripheral characters were not visible and used as a ‘guard band’ to prevent off-screen characters. I was with you all the way up to "a...

Fun fact: it seems that if you tell the system at startup that it has memory of a certain size, it will believe you and not bother counting it. Therefore you can tell a 4K system that it has 8K, and all will be well until it actually tries to access memory that it doesn't have. "PRINT FRE(0)" will give wrong results based on the amount o...

Is anyone able to make the Hardware (video) section of article in the link a little clearer? :? "The Superboard featured a 24 by 24 character display (yes, only 24 characters across) held in 1K memory mapped from $D000 to $D3FF. It was arranged in memory as 32*32 characters however not all are visible." http://www.technology.niagarac.on.c...

danielb wrote: ↑Tue Oct 26, 2021 5:01 pm Could you try this version too? The first one was a little overengineered, which resulted in an unnecessarily large core. This one should behave in exactly the same way as the first.

Tks,

D.

Seems to be working in exactly the same way.
I've set it up to start as an unexpanded UK101. Very good!

danielb wrote: ↑Tue Oct 26, 2021 3:52 pm Hi all,

Here is a new test version with variable memory sizes. You can switch between 4K,8K,32K and the maximum 41K.

D.

This is great! I'm trying it now. Thank you

[/quote] I pushed a new version with fixed resolution selection. Getting the menu right is one of the most difficult parts of the whole project. This version actually has a separate monitor menu for each machine type, but only displays one at a time, and lots of conditions for greying out of menu items. Please let me know if there are any more bugs...

Hi and thanks for the update. Thought you'd want to know that I've noticed the same problem with screen resolution greying out. Also on starting the core if I cycle through Monitor the second time around upon reaching WEMON I get WEMON's 6502 register status (see image). When I Reset, via OSD, the selected monitor starts up okay Screenshot_20211025...

danielb wrote: ↑Sun Oct 24, 2021 10:23 pm I know. I have a fix for that which I will push tomorrow. Meanwhile, select Cegmon, low-res, and then the monitor that you want.

D

Ah okay. Thanks

While in UK101 mode I can't select low resolution for some Monitors as that selection is greyed out

Nice job as usual. Thanks for the update