Search found 83 matches

by Mills
Sat Feb 25, 2023 9:35 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: PCXT Core Access to Secondary SD Card
Replies: 105
Views: 22107

Re: PCXT Core Access to Secondary SD Card

I created a test branch to access a secondary SD card from the PCXT core. The SD card can be used by setting the "MMC" option in the OSD menu to "Enable" and performing a reset. SD card works as a secondary IDE(KFMMCIDE00000). Note that this is a test branch. I am testing with a 2GB SDSC and do not know if other devices will wo...
by Mills
Sun Jan 01, 2023 2:49 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: Development of an XTIDE-Compatible IDE
Replies: 120
Views: 31498

Re: Development of an XTIDE-Compatible IDE

I have re-enabled this COM2 feature to /dev/ttyS1 , I attach binary, can you check its correct working? Yes, it works! I made First Contact with the 13Th level BBS! PCXT-FirstContact.png There is no UART OSD option... so I'm guessing this is needed in the core to enable the option: localparam CONF_STR = { "PCXT;UART115200:115200;", Anywa...
by Mills
Wed Dec 14, 2022 10:10 am
Forum: IBM PC, PCXT, Tandy 1000
Topic: Ideas for PCAT
Replies: 36
Views: 12333

Re: Ideas for PCAT

Now that the PCXT core is finally "done", I can't help but wonder what it would take to create a core for an AT-class architecture (I know Spark will take a hyatus; this is by no means a request but rather a thought experiment for my own curiosity) This would be best suited for a new core to avoid breaking the use cases of PCXT (and also...
by Mills
Tue Nov 29, 2022 10:26 am
Forum: IBM PC, PCXT, Tandy 1000
Topic: Pixel Perfect Output on VGA CRT 31khz
Replies: 25
Views: 8095

Re: Pixel Perfect Output on VGA CRT 31khz

Is it possible to use theme on PC/XT core? Or, in alternative, is it possible to make that PC/XT core change resolution if it passed i.e. from 640x200 text mode to 320x200 graphics mode? You should try 640x400 (not 640x200), the actual size of the final image on the crt should be 640x400 because scanlines are doubled. I suppose forced_scandoubler ...
by Mills
Fri Nov 25, 2022 10:36 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: 8-bit Sound Cards
Replies: 46
Views: 4042

Re: 8-bit Sound Cards

Hercules is very interesting. 320x200x16 EGA doesn't seem a lot different from 320x200x16 Tandy in the cross section of games that support it or their target CPU speed but I am not sure about that. 640x350x16 is a whole other thing and there were very few games that ran in that. Shareware mostly. My point is not that EGA should be included, but th...
by Mills
Wed Nov 23, 2022 10:59 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: New Tandy 1000 Graphic Modes
Replies: 38
Views: 4727

Re: New Tandy 1000 Graphic Modes

Agree with you for the VGA, I've a real PC-XT with a VGA card but only to connect it on a "recent" monitor, not really to use the VGA resolutions / nbrs of colors. You should test some EGA games, you'll be surprised the things an XT can do, many EGA programs and games up to 1992 will work very well, even VGA ones. Also I'm not saying thi...
by Mills
Wed Nov 16, 2022 5:52 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: PCXT Core 10Mhz CPU Speed Possible?
Replies: 101
Views: 8055

Re: PCXT Core 10Mhz CPU Speed Possible?

For the same reason, I wonder if a 286 core makes sense at all, given that ao486 covers basically all of the needs that a 286 is capable of. Beyond the preservation of specific popular computers like the 5160 or the PS/2, I don't see a need for such a core. I think it would be awesome but just for preservation of the cpu, because it has instructio...
by Mills
Thu Nov 03, 2022 8:38 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: UX for the Poor 8088
Replies: 43
Views: 11962

Re: UX for the Poor 8088

It swaps out used conventional memory to EMS/XMS or disk leaving around a 1K footprint leaving 628K conventional RAM free. Awesome I have to test this :). Also the freeze happens when launched straight form DOS. I do have several TSRs loaded like CTMOUSE.EXE, DOSMAX.EXE, LTEMM.EXE and LFNDOS.EXE. I'll try without those to see if the conflict is th...
by Mills
Thu Nov 03, 2022 6:39 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: UX for the Poor 8088
Replies: 43
Views: 11962

Re: UX for the Poor 8088

I think you misunderstand my intended purpose for MyMenu... It's not really a music player. Sorry :D, awesome launcher, just be careful with ram usage, it might freeze the pc/core/emulator when loading some games and programs. That being said, I did try your Adplug OPL2 and it looks very nice and I very much like the visuals, however, it locks up ...
by Mills
Wed Nov 02, 2022 10:02 am
Forum: IBM PC, PCXT, Tandy 1000
Topic: UX for the Poor 8088
Replies: 43
Views: 11962

Re: UX for the Poor 8088

So going through the INI file, it seems like we need to remove the TURBO options so only the "slow" one remains? # TURBO=Full - 486; $A100 # TURBO=Med - 286/386; $A1A0 TURBO=Slow - XT 8088; $A1A1 Or would it be enough to just have this? You can still # out those "TURBO" options to disable the feature entirely, however, After do...
by Mills
Sat Oct 29, 2022 9:46 am
Forum: IBM PC, PCXT, Tandy 1000
Topic: Some Research Over the Keyboard Issues on Hang Shift for Keyb sp
Replies: 16
Views: 1614

Re: Some Research Over the Keyboard Issues on Hang Shift for Keyb sp

kitune-san wrote: Sat Oct 29, 2022 9:18 am
kitune-san wrote: Sat Oct 29, 2022 8:56 am Maybe they are clearing the flag here.

2022-10-29 175450.png
This line has been changed to NOP.
https://github.com/kitune-san/PCXT_MiST ... 420001e0cd
It seems to work well. I tested Spanish keyboard:
20221029_094433-screen.png
20221029_094433-screen.png (57.98 KiB) Viewed 1360 times
by Mills
Tue Oct 11, 2022 9:15 am
Forum: IBM PC, PCXT, Tandy 1000
Topic: Mouse Support Over the COM2 Port in PCXT Core
Replies: 60
Views: 23881

Re: Mouse Support Over the COM2 Port in PCXT Core

Mouse is working fine now:

Cartooners:
20221011_090924-screen.png
20221011_090924-screen.png (104.94 KiB) Viewed 13258 times
GEM desktop (install microsoft mouse):
20221011_090745-screen.png
20221011_090745-screen.png (264.63 KiB) Viewed 13258 times
by Mills
Mon Oct 10, 2022 11:21 am
Forum: IBM PC, PCXT, Tandy 1000
Topic: Mouse Support Over the COM2 Port in PCXT Core
Replies: 60
Views: 23881

Re: Mouse Support Over the COM2 Port in PCXT Core

kitune-san wrote: Mon Oct 10, 2022 8:46 am Could you try this?

https://github.com/kitune-san/PCXT_MiST ... ture-mouse
Thanks!.

Y axis looks ok, X axis has issues, cursor gets stuck at the borders.
by Mills
Fri Sep 23, 2022 3:51 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: Interesting Tests We Could Run For x86
Replies: 25
Views: 2819

Re: Interesting Tests We Could Run For x86

Here are the tests I wrote to verify the MCL86 core which touch on the opcodes, addressing modes, and flags. https://github.com/MicroCoreLabs/Projects/tree/master/MCL86/Tests It compiles using A86 into .COM files which run under DOS. I'm sure they are not 100% exhaustive but were good enough to verify the core to a large degree. Source code is sim...
by Mills
Fri Sep 23, 2022 2:02 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: Interesting Tests We Could Run For x86
Replies: 25
Views: 2819

Re: Interesting Tests We Could Run For x86

I've found some interesting tests that were linked from vogons for verifying x86 CPu https://forum.osdev.org/viewtopic.php?f=13&t=23739&start=15 I guess it's just a matter of compiling them I compiled that, they had some errors (relative jump instructions out of range for 8088/86) I think I solved that, there are some "failed" te...
by Mills
Wed Sep 07, 2022 8:04 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

Last changes seem to improve timming, more programs started working, like the game "Ski or die". Area5150 demo worked with just tiny glitches (well the final scenes with wave effects need crts and I can't test that). 8088mph demo worked nearly perfect, including the music from the credits, and the vertical bars scene is working very well...
by Mills
Tue Sep 06, 2022 9:41 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

Last changes seem to improve timming, more programs started working, like the game "Ski or die". Area5150 demo worked with just tiny glitches (well the final scenes with wave effects need crts and I can't test that). 8088mph demo worked nearly perfect, including the music from the credits, and the vertical bars scene is working very well....
by Mills
Sun Sep 04, 2022 10:29 am
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

This new version (by spark2k06) implements two page VRAM for tandy, it solves flickering in many games that use double buffer.
by Mills
Sat Sep 03, 2022 10:39 am
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

Last update solves some issues in area5150 demo, for example, vertical scrolls are 1 pixel at a time, super smooth 60 fps. Previous versions of the core had a 2 pixel scroll, which looked like 30 fps. Also the multi layer scene, looks bad at 4.77 Mhz and looks ok at 7 mhz.
by Mills
Mon Aug 29, 2022 4:29 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

It was late last night so I did not get a change to suggest that the problem appears to be in the BIU, but @kitune-san seems to have found it! :) Im very surprised that only PKUNZIP was having trouble as the problem with the BIU appears to have been related to word accesses so you would think many applications would also be failing! Maybe there ar...
by Mills
Sun Aug 28, 2022 2:27 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

I noticed during the process of working on it that it needs some more improvement for stable operation. Freeze occurs during disk read. The image is when trying to read FreeDOS x86BOOT.img. 2022-08-23 232256.png I will create a temporary branch. Please help! The code before the rebase was saved in the following branch Notes. Please set the FDD dis...
by Mills
Thu Aug 25, 2022 11:01 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

Good to see this core released! Great job! Is there any equivalent to the eXo/Flynn Top 300 DOS Pack for this core? (focusing on 8086 games) I don't know if that's a good idea for 8088, I am testing some file managers and they all use ram or install TSR programs that stay in ram and make things slow and glitchy, but maybe it is possible to do it.
by Mills
Wed Aug 03, 2022 8:26 am
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

@spark2k06 Timing constraint violations have been overlooked for a long time. I have a suggestion to resolve the timing constraint violation. I have considered two methods. You can choose one or the other. 1. Change the chipset frequency to 50 MHz for the PLL output. https://github.com/kitune-san/PCXT_MiSTer/tree/prebeta-2.0-timing-adjustment-50mh...
by Mills
Mon Aug 01, 2022 12:47 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

Thanks for your input so far. I had no success with the CBM PC-I, but I got the CBM PC-10 BIOS to boot after padding the file with 32kb of zeros at the beginning: pcxt-pc10.jpg So that was half a success. I learned that this is not a good idea at all and will stop further approaches. :D I tried that bios and I inserted the xtide at the first 12kb,...
by Mills
Sat Jul 30, 2022 9:32 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

BIOSes were, in effect, very early drivers; they were done custom for each machine, to give DOS an interface to the motherboard devices. Running an alien BIOS doesn't really make sense. It's like trying to use the wrong driver in Windows. Each BIOS is customized per-machine, and while you can sometimes use a specific ROM on a different motherboard...
by Mills
Sat Jul 30, 2022 9:29 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

Thanks to flynnsbit's 500MB image, I was able to make one of my by-year collections specially for this core. It contains all the games from years 1981-1986, and most of 87, based on Total Dos Collection from last year. There are a lot of games up to 1992 that will work well even on 4.77, for example cool croc twins (and it has tandy support :D ) S...
by Mills
Sat Jul 30, 2022 3:10 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

Is adlib sound currently output as normal on pcxt core? I tested it with an adlib music player and checked that the sound was mixed with noise. Fortunately, unlike the ao486, the custom drum set sounds seem to be relatively well implemented. I'm not sure if this noise is a problem with Jotego opl2 or pcxt core. I also want to transplant Jotego's o...
by Mills
Mon Jul 25, 2022 6:34 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

So good news... I finally managed to get filters (scanlines) working! Submitted a pull request to merge to the beta branch. very sorry ~ I solve it. :roll: Can you check if the attached custom build works with your CRT? i.e. whether it still has that strange sync issue? (note: the MDA mode is broken, so just use CGA with it) then I would assume fr...
by Mills
Tue Jul 19, 2022 2:11 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

kitune-san wrote: Tue Jul 19, 2022 1:19 pm I added key code conversion for Tandy mode
However, I have not prepared an application that uses the cursor keys.
Could someone please try this core?
A browser called Norton Commander works now using directional keys, thanks :).
by Mills
Fri Jul 15, 2022 1:42 pm
Forum: IBM PC, PCXT, Tandy 1000
Topic: MiSTer PCXT
Replies: 1405
Views: 310103

Re: MiSTer PCXT

suww37 wrote: Fri Jul 15, 2022 12:37 pm
Newsdee wrote: Fri Jul 15, 2022 12:15 pmI use DOS 6.22
Does the double dragon work well?

Tetris also wonders if the graphics are coming out normally.
I use 6.22 and double dragon works well, I was told dos 6.22 does not use more ram that older version, it even uses less ram than others like version 5 for example.