Search found 101 matches

by JohnElliott
Mon 06 Mar, 2017 11:03 am
Forum: Development
Topic: ST-412/ST-506/ESDI hard drive emulation?
Replies: 51
Views: 13969

Re: ST-412/ST-506/ESDI hard drive emulation?

For flexibility, perhaps SCSI is the way to go -- the Future Domain TMC-850 was quite a common 8-bit SCSI card. The 8.2 BIOS is the best one to use on an XT as later versions don't hook INT 19h and rely on the motherboard BIOS to know about booting from hard drives.
by JohnElliott
Sat 17 Dec, 2016 5:30 pm
Forum: Development
Topic: [Patch] Wyse 700 graphics support
Replies: 7
Views: 3342

Re: [Patch] Wyse 700 graphics support

OK, here's a path to vid_wy700.c that seems to improve matters for me.
by JohnElliott
Fri 16 Dec, 2016 10:42 pm
Forum: Development
Topic: [Patch] Wyse 700 graphics support
Replies: 7
Views: 3342

Re: [Patch] Wyse 700 graphics support

I've put a copy of the character ROM at http://www.seasip.info/tmp/wy700.rom
by JohnElliott
Fri 16 Dec, 2016 10:40 pm
Forum: Development
Topic: [Patch] Wyse 700 graphics support
Replies: 7
Views: 3342

[Patch] Wyse 700 graphics support

The Wyse 700 video card has a fixed-resolution 1280x800 display, with a 16x16 character bitmap.

I've tested this against real hardware with a handrolled test utility and with GEM.
by JohnElliott
Sun 30 Oct, 2016 6:28 pm
Forum: Development
Topic: Building on Linux Mint... Error
Replies: 3
Views: 2231

Re: Building on Linux Mint... Error

This happens to me when I try to build Linux pcem from source. What I did to fix it, the most recent time, was: * Create a shell script called "reconfig", containing these commands: #! /bin/sh set -x aclocal autoheader libtoolize automake --foreign --add-missing --copy autoconf Then run it: chmod +x...
by JohnElliott
Mon 17 Oct, 2016 2:53 pm
Forum: Development
Topic: [Patch] Plantronics Colorplus support
Replies: 7
Views: 3584

Re: [Patch] Plantronics Colorplus support

Apparently snow was a possibility: "With Flight Simulator, the Paradise MultiDisplay worked perfectly, but the Plantronics Color-Plus board produced a significant amount of color snow on an RGB monitor" . When I was developing the patch, I tested against the 'Plantronics mode' of the Paradise EGA ch...
by JohnElliott
Sun 09 Oct, 2016 8:17 pm
Forum: Development
Topic: [Patch] Plantronics Colorplus support
Replies: 7
Views: 3584

Re: [Patch] Plantronics Colorplus support

Yes (apart from the bits copied and pasted from the CGA driver).
by JohnElliott
Sun 09 Oct, 2016 7:38 pm
Forum: Development
Topic: [Patch] Plantronics Colorplus support
Replies: 7
Views: 3584

[Patch] Plantronics Colorplus support

Another old-world video card; the Colorplus is a superset of CGA, with two extra graphics modes (320x200 16-colour and 640x200 4-colour).
by JohnElliott
Sat 08 Oct, 2016 9:45 pm
Forum: General
Topic: [Bug] No A20 wrap on XT
Replies: 1
Views: 991

[Bug] No A20 wrap on XT

On a genuine XT, addresses above 0xFFFFF wrap round: C:\>debug -dc:0,f 000C:0000 EA 60 11 32 01 10 32 01-FC 10 32 01 43 C0 FF EF .`.2..2...2.C... -df01d:fef0,feff F01D:FEF0 EA 60 11 32 01 10 32 01-FC 10 32 01 43 C0 FF EF .`.2..2...2.C... - On PCEM's XT emulation, they don't: C:\>debug -dc:0,f 000C:0...
by JohnElliott
Wed 03 Feb, 2016 9:07 pm
Forum: Development
Topic: [PATCH] Hercules InColor
Replies: 1
Views: 1544

[PATCH] Hercules InColor

I'd better start by apologising in advance for my unfamiliarity with the PCEM codebase; there are some places (such as where I call video_blit_memtoscreen() ) I've no real understanding of what the parameters mean, and just fiddled with them until the output looked right. This patch (against 10.1) a...
by JohnElliott
Mon 01 Feb, 2016 7:16 pm
Forum: General
Topic: Hercules crash under Linux
Replies: 1
Views: 1371

Hercules crash under Linux

PCEM v10.1 under Linux System: IBM 5160 Video card: Hercules pcem crashes in allegro_blit_memtoscreen_8 (x=0, y=1000, w=720, h=200): (gdb) bt #0 0x00000000004e8a7a in allegro_blit_memtoscreen_8 (x=0, y=1000, w=720, h=200) at allegro-video.c:98 #1 0x0000000000556788 in hercules_poll (p=0x2e5a410) at ...