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Re: BIOS detection of floppy disk drives?

Posted on 2015-09-14, 04:46

I do not think he is emulating a 5150 but rather a 5160 (XT) hence he needs the port 63 to convey number of floppy disks. Basically you have to be careful what your BIOS is expecting: IBM PC vs IBM PC XT vs IBM PC AT, as they all report floppies differently. Vlad. It's indeed a PC XT system (or AT …

Re: x86EMU emulator testers wanted

Posted on 2015-09-13, 19:36

My latest x86EMU build: x86EMU_20150913_1940.zip - Optimized various parts of the emulator (CPU&VGA). - Fixed timing by increasing timing from microsecond to nanosecond range (allowing frequencies of the PIT higher than 1MHz). - Added better support for linux builds. - Added PPI hardware interface ( …

Re: BIOS detection of floppy disk drives?

Posted on 2015-09-13, 16:02

I've fixed the problem: For two floppy drives, PPI port 0x62 needs bit 2 set and bit bit 3 cleared (bit 2 meaning 2 floppy disks and bit 3 meaning 3/4 floppy disks when set). Although for some reason all sources of the PPI port 0x62 tell me that it's supposed to be bit 6&7?

BIOS detection of floppy disk drives?

Posted on 2015-09-13, 13:40

How does the BIOS detect the amount of floppy disk drives attached to a floppy disk controller? In my emulator it always detects 4 floppy disk drives, instead of the 2 drives installed (A and B) when port 62&63 contain 0xFF by default, and no drives when 62&63 contain 0x00 by default. Anyone knows …

Re: x86EMU emulator testers wanted

Posted on 2015-09-10, 14:03

My latest x86EMU build: Filename x86EMU_20150910_1332.zip File size 344.37 KiB Downloads 75 downloads File comment x86EMU build 2015/09/10 13:32 - Applied changes to support linux (source code wise, currently untested on linux). - Fixed some PSP vs linux bugs and 64-bit fopen. It should now work …

Re: x86EMU emulator testers wanted

Posted on 2015-09-09, 18:56

My latest x86EMU build: x86EMU_20150909_2018.zip - Optimized dynamic image read/write of sectors. - Optimized disk handler results. - Optimized IDE/ATA hardware. MS-DOS can now fully handle the mounted ATA hard disks (no errors anymore). Booting from a hard disk is still to be fixed (working on it). …

Re: x86EMU emulator testers wanted

Posted on 2015-09-09, 07:02

My latest x86EMU build: x86EMU_20150908_2130.zip - Added locks to all output to text surfaces (making the application more robust in multithreading). - Fixed keyboard. It was detecting it still was executing a command in some cases, when it's actually done already. - Simplified text surfaces to fix …

Re: x86EMU emulator testers wanted

Posted on 2015-09-08, 14:06

My latest build: x86EMU_20150908_1559.zip - Fixed IDE/ATA hard disk emulation. It's now correctly reading and writing the hard disks. - Optimized Superfury Dynamic Disk Image (SFDIMG files) hard disk image access. - Moved BIOS hard disk image information up. - Added support for .ima disk images. - …

Free 80(1)86 compatible VGA BIOS?

Posted on 2015-09-07, 14:43

Is there a free or open source VGA 80(1)86 BIOS I can legally use with my x86EMU? So far I got the Turbo XT BIOS v2.5 and PC-XTIDE BIOS as free alternatives. Is there a free or open source VGA BIOS I can use/bundle with my emulator? I think maybe SeaBIOS, but I can't find the 16-bit version of it?

Re: x86EMU emulator testers wanted

Posted on 2015-09-07, 09:11

Here's a newly createn 8GB(although paritioned as a total of1 4GB due to MS-DOS 6.22 fdisk limitations) hard disk image: Filename 8GB.sdfimg.zip File size 3.43 KiB Downloads 80 downloads File comment 8GB SFDIMG hard disk paritioned as 2GB and 1.66GB drives. The same image, but with FDISK /MBR and …

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