[Patch] Trigem Korean VGA

[Greatpsycho]

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 video memory to 512KB or 1MB.

TGKVGA1.png (37.65 KiB) Viewed 19658 times

TGKVGA2.png (65.56 KiB) Viewed 19658 times

[Greatpsycho]

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.

[te_lanus]

Running on the latest commit:

[Greatpsycho]

Running on the latest commit:

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

[te_lanus]

Sorry seems I uploaded the wrong pic:

Here's the right one


Win 3.1

[SarahWalker]

Merged Trigem emulation at rev 1201. I've left the ET4000 memory size selection out as it seems to rely on a hack.

[Greatpsycho]

This patch does the following

- Implemented experimental bank-interleaved addressing emulation on ET4000AX series. ET4000AX series BIOS now can detect memory size automatically.
- Allows select ET4000AX series video memory size to 256KB(except Trigem Korean VGA), 512KB or 1MB.

Edit : This patch has been incorporated [url=http://pcem-emulator.co.uk/phpBB3/viewtopic.php?f=5&t=3075&p=13479#p13479]here[/url].

[Greatpsycho]

This patch does the following

- Implemented experimental bank-interleaved addressing emulation on ET4000AX series. ET4000AX series BIOS now can detect memory size automatically.
- Allows select ET4000AX series video memory size to 256KB(except Trigem Korean VGA), 512KB or 1MB.
- Add cascading call to et4000k_in and et4000k_out function.

Edit : This patch has been incorporated [url=http://pcem-emulator.co.uk/phpBB3/viewtopic.php?f=5&t=3075&p=13515#p13515]here[/url].

[Greatpsycho]

This patch does the following

- Implemented experimental bank-interleaved addressing emulation on ET4000AX series. ET4000AX series BIOS now can detect memory size automatically.
- Allows select ET4000AX series video memory size to 256KB(except Trigem Korean VGA), 512KB or 1MB.
- Add cascading call to et4000k_in and et4000k_out function.
- Implemented byte panning(CRTC R8) and cursor skew(CRTC R11) handling.

Edit : I've re-uploaded this patch as requested. And I've uploaded CRTC.COM to show and change CRTC registers for video test.

CRTC_USAGE.png (27.15 KiB) Viewed 12728 times

[SarahWalker]

Committed byte panning and cursor skew at ed30e171.

I've not committed the addressing changes, as I'm not keen on adding an additional slow path to all the VGA read/write handlers, as this affects all cards to some degree. I think a better approach would be to have some specific ET4000 handlers for this, and to fallback to the standard handlers once the card has been configured for no translation.