This replaces the above patch - it fixes a crash (when changing to the built-in adapter from an add-on) and adds emulation of the PPC512 with its LCD screen.

This patch adds support for the multiple hardware fonts supported by the PC1512 and PC200 built-in video adapters, and mono/colour monitor options for these systems.

Updated again to fix bits of Write: TDEFIN was losing sync on non-square fonts, because I had 'rows' and 'columns'' round the wrong way TSIZE was not implemented There's a variant of the text draw command that Write uses when drawing page numbers. For now I've aliased it to the normal one, so the te...

This version of the patch seems to sort out the issues I was experiencing with In*a*Vision - mainly to do with bugs and overflows in the polygon fill.

... Actually, the above patch may not be so final, because some of the graphics in Micrografx In*a*Vision don't render properly. Back to the coding mill for me...

OK, I think this is about as good as it gets, at least as far as running Windows 1 in 256 colours is concerned. http://www.seasip.info/Misc/win1_256c.png What the patch gives you isn't anything like a complete IM1024, or even a complete PGC. But it does seem to cover those features used by IM1024.DR...

This is very much not ready for prime time - I'm posting what I've written so far just in case I get hit by a meteorite or something. It's a patch implementing not quite enough of the Vermont Microsystems Image Manager 1024 to run Windows 1.03 in 256-colour mode. It's inclined to hang from time to t...

Not with the stock floppy controller. They would have needed a replacement high-density floppy controller with its own BIOS.

A bugfix: In the 80-column mode, the cursor was only being displayed on even-numbered columns. --- vid_sigma.c.orig 2018-11-03 00:03:21.290695326 +0000 +++ vid_sigma.c 2018-11-03 00:07:38.479033716 +0000 @@ -441,7 +441,7 @@ // { // pclog("[%x:%x]%c", cols[1], cols[0], chr); // } - if (draw...

Off-topic, but for me the main interest in this release is that it's from the era when MS-DOS wasn't tied to the PC architecture. So it would be interesting to see IO.SYSes for platforms like the BBC Master 512, or an entirely barebones emulator with only teletype input/output. Still, my to-do list ...

Quick answer: Yes, it does.

The Sigma Designs Color 400 has only one claim to fame that I'm aware of - the only 4-colour driver for Windows 1.0 that I know of was written for it (SIGMA4.DRV). I implemented it to see what Windows 1.0 looked like in 4 colours: http://www.seasip.info/Misc/win1_4colour.png But I thought I might as...

Thanks! That's got the ROM paging working - now I just need to implement everything else...

I'm experimenting with implementing a video card which has an 8k BIOS ROM at 0xC0000, as expected. But it also has the ability to page in 2k of RAM over the last 2k of ROM (ie, at 0xC1800). My question is, what's the best way to implement this in PCEM? I've tried using rom_init() to load the ROM, an...

But now I was also able try PCem's Hercules InColor emulation - and my code detected the CRTC vsync for that too. Now I all need to search for a way to tell HGC and InColor apart! (oh, and a better algorithm than one based on trying to sample a quasi-realtime pulse) :) Take a look at bits 6-4 of th...

Banjo wrote: ↑Wed 12 Sep, 2018 5:31 pm It seems saveROM is pretty straightforward... I just boot and run it with a "saverom romfile" command, right? Any way to test it or know if I've done it right before doing it for real on my ancient machine?

Practise in a PCEM session and see what it does

Or you could use a utility like SaveROM, which scans the upper 256k and saves the BIOS and any adapter ROMs it finds.

It was on an Amstrad PC1512, but that's not the best machine to use because Karateka uses the onboard CGA in preference to the InColor, and I had to patch that check out. Once that was done, it just stopped at a message saying 'Make sure your Karateka disk is in drive A:' as it tried to access which...

There's no BIOS support for the InColor card, just like there wasn't for the original Hercules card - you configure either as MDA. I remember testing a copy of Karateka found online with a real InColor card and it didn't work - the dump was missing the required graphic files for HIC support. You mig...

Looking at https://github.com/libLAS/libLAS-1.2/bl ... s/guid.hpp I think the variant and version should be at offsets 6 and 8 rather than 7 and 9:

This is not particularly tested, but I think should put the bits in the right place. mkguid() is the function that does the work; the rest is a test harness. The #ifdefs mean that if the system provides a GUID generator, that will be used in preference to the rand() method. #include <stdio.h> #inclu...

I found only one small issue after applying the patch. The TEST1 utility fails (abort) when checking the memory, however the memory amount in 1MB/2MB config is correctly detected. I've finally got round to looking at this. I think TEST1 is trying to test 2k of RAM at F000:0000, which I believe is a...

Try adding at the top of wx-createdisc.cc .

As far as I can tell from the manual, that feature's for compatibility with awkward programs rather than a particular monitor.

In this page , John Elliot shows different values for dip switches on PC1640 mainboard (funny, it seems that there were TWO EGA displays). I think you've misread it -- the 'Secondary EGA' settings mean that the built-in EGA remains active, but a CGA or MDA card in an expansion slot is used as the p...

This patch seems to fix the glitches for me. The first was a straightforward hardcoded RAM size (this should also stop the T1000 crashing if it's manually configured with a non-standard RAM size). The second was a BIOS feature to disable the built-in video chipset, so that an alternative video card ...

I got that on initial boot, and I think just pressing RETURN is enough to get you past it. It's part of a message in the ROM saying that the CMOS is corrupt, and asking you whether the defaults should be set for HDD+FDD or FDD+FDD.

I've dumped the firmware ROM from the hard drive controller (looks like Z80 to me) but didn't try to implement it in the patch. It only supports two drive sizes (10Mb or 20Mb) so you'd be better off using one of the existing controllers already implemented in PCEM, such as XTIDE.

I've now submitted a patch to implement T1200 emulation and fix the crash when using the T1000 with XTIDE.

This implements T1200 support, and also fixes the crash when you enable XTIDE on the T1000.