This patch solves problem that screen doesn't properly displayed when using EGA/VGA class card in XT class machines.

te_lanus wrote: ↑Sun 25 Nov, 2018 2:44 am Running on the latest commit:

You seem to have used HBIOS, a general-purpose driver, not the Trigem Korean VGA driver I sent you.

This patch applies experimental implementation for Trigem Korean VGA which is ET4000AX compliant and supports KSC-5601 Korean character set specification. Reworked against rev 1200.
And this patch allows select ET4000AX video memory size to 512KB or 1MB.

This patch correctly sets dipswitch value of AMA932J's built-in OTI067. AMA932J no longer displays black/white mode.

This patch applies Korean font ROM can be accessed even if Korean character display mode isn't activated as real hardware does.

Thanks! Enabling the Shadow RAM and copy Video RAM solved the problem, and improved the general performance too. I have a last question: The Lastbyte Manager, (both 2.20 and 2.53) identifies the chipset as HT21, not GC103/113 as saying the EMS device driver. I have a couple of EMS drivers for HT18 ...

I have another question? I did the changes you suggested me, but with the Trigem 286 machine when I run Windows 2.11/286 the machine crash at startup. It works if I remove Himem.sys. The 386SX machine has no issue. my configuration is: Trigem 286, OTI-067 VGA, 3MB RAM, DOS 3.31 and Windows 2.11/286...

I found on Vogons site a near identical BIOS of HT103, 286 chipset, but it is from 1990 and have an option to select the amount of EMS memory in BIOS (here: https://www.vogons.org/viewtopic.php?f=46&t=53945&p=584228&hilit=headland+ht18#p584228 The link's BIOS uses Headland HT12 chipset....

PCS 286: Works with a few issues during boot and CMOS setup. Tested with: DOS, Windows 3.1 and some games. During boot it will complain about VGA and Protected Mode, just press F1 to skip. Needs HEADLAND GC101, GC102, GC103 chipset and a few things. PCS 286 S: Works with a few issues during boot an...

This patch applies experimental implementation for Trigem Korean VGA which is ET4000AX compliant and supports KSC-5601 Korean character set specification. If you need BIOS ROM, font ROM and device driver for it, please send send your e-mail address as PM for me. And this patch allows select ET4000AX...

This patch applies the following. - Implemented experimental Headland HT102 chipset based EMS support. - Add two machines 1. Trigem 266M One of famous Korean 286 machine uses Headland HT102 chupset. TG286M-Startup.png 2. AMA-932J Uses 386SX CPU and Headland HT18 rev B chipset(Its EMS function is com...

This patch implements software turbo control on LaserXT series.
Please note LaserXT series's BIOS disables software turbo during POST. To enable turbo, press CTRL+8 during or after memory testing.
And previous fix patch is also included.

This patch fixes a problem where the LaserXT series doesn't work properly when set memory to more than 640KB with EGA/VGA card after Generic XT clone patch is applied.

Edit : This patch has been incorporated here.

This patch applies the following.
- Load IBM-BASIC rom if it is available.
- Can handle memory up to 704KB if MDA or CGA compatible card is used.

These documents are I/O port information of IBM 8514/A and XGA adaper. These may help to implement the emulation of IBM 8514/A and XGA card.

This patch does the following. - Implemented ROMCS enable feature. - Fixed RAM write protect register setting wasn't properly applied. - Implemented Encoded RAS mode emulation on 82C235 revision A and 82C386 chipset. - Implemented of experimental memory bank interleaved addressing emulation on 82C83...

What conditions are causing this crash? I'd be extremely dubious about any situation where _mem_exec was set but _mem_mapping_r was not - that would imply that memory mapping has not been set up correctly. This is a rare occurrence in some unusual situations(chipset's memory population configuratio...

This patch checks that _mem_mapping_r value isn't null on getpccache function. PCem no longer crashes when in some unusual memory mapping conditions.

Sorry for late reply.
I've just known this issue has been posted. Award 286 clone's BIOS set waitstates to 0 during POST. SCAT chipset can control waitstates through chipset-specific register.

I've tuned cpu_rom_prefetch_cycles value to when accessing 150ns mask-rom cycles. I think this is probably closer to real machines.

This patch implements user-defined character handling on ATI Korean VGA. To use user-defined character, you need font edit program and user-defined font files. And user-defined font files(UDCCON.SYS and UDCPRT.SYS) must be placed on current directory. If you need these files, please send PM to me. H...

Hello. I sent you the 30mb IDE Hard Disk image file I use with SCAT machines. The config is in the CONFIG.SYS file. I've tested what you provided and it seems not enough UMB provided to SMARTDRV.SYS required to work properly. Your SMARTDRV.SYS requires at least 64KB contiguous memory block to work ...

And for the KMS-C-02 ,Qram is detecting 128kb of free UMB, but , maybe for some reason the SCATsx chip, uses the B000-B7FF or C800-CFFF later on, generating the freeze. These memory areas and E000-EFFF are reported as free by QRAM. I know D or E can be the EMS page frame or used as UMB memory, but ...

I tested the SPC-2016P and it lock's up when the EMS driver is loading. Even if no UMB driver is used. I put HIMEM.SYS after EMS.SYS but it still freezes. It seems to be a problem with EMS driver. Show EMS driver's offset 0x569c to 0x569e with hex editor. If values are 0x24 0x0f 0x50, change values...

STACKS=9,512 FILES=40 BUFFERS=40 DEVICE=HIMEM.SYS /MACHINE:2 DEVICE=CLEAREMS.SYS DEVICE=C:\QRAM\QRAM.SYS R:1 X=E000-EFFF DEVICE=C:\QRAM\LOADHI.SYS /R:1 EMM.SYS FRAME=E000 EXCLUDE=D000-DFFF DEVICE=C:\EMM.SYS FRAME=D000 DEVICE=C:\QRAM8\LOADHI.SYS /R:2 C:\SMARTDRV.SYS 448. Please remove DEVICE=EMM.SYS...

This problem is caused by using keyboard command 0xB4 and 0xBC that aren't yet implemented in PCem. Here are two workaround to avoid this problem. You only need to apply one of the two methods below(Both are actually same). 1. Modify BIOS rom file. Change offset 0x256 - 0x04 to 0x00 and offset 0xFF5...

This patch applies the following additions. This patch replaces previous patch.
- Implemented ATI-28800 clock setting.
- Separated Korean character display part from svga_render_text_80 function and made it a separate function.
- Add show status information for Korean VGA mode.

This patch applies the following additions. - Add clearing in_get_korean_font_kind_set flag that I've missed previously. - More improving accuracy of handling SVGA CRTC register 0x17. 800x600 resolution mode now works properly. - Add 1024x768 mode register handling. 1024x768 resolution mode now work...

This patch applies the following additions.
- Improved handling SVGA CRTC register 0x17 and SVGA ATTR register 0x10. Olivetti M24 compatible mode(BIOS mode ox40) now works properly when ATI Korean VGA driver is loaded.

Edit : This patch has been incorporated here.

Recently, I've exprienced trouble adding and editing attachment files in forum.
Attached file dows not show when editing so I can't properly modify or delete attached files.
Please check attached files handling.

Regards.