I forgot to answer your original question about systems. I built the disk using DOS 6.22 and Windows XP, both running on Parallels (on a Mac). Parallels emulates a standard PC but uses virtualization to work. Anyway, I would expect that if runs on that, it will run on any PC after 1992. Here’s the file list: Volume in drive Z is MS-RAMDRIVE Directory of Z:\WINDOWS . <DIR> 09-06-20 5:38p .. <DIR> 09-06-20 5:38p ACCESSOR GRP 2,206 09-05-20 7:52p CONTROL EXE 15,872 12-31-93 6:11a CONTROL INI 3,824 09-05-20 6:38p DOSPRMPT PIF 545 09-05-20 2:14p DRWATSON EXE 26,864 09-06-20 12:14p MAIN GRP 5,115 09-05-20 7:52p MOUSE INI 24 09-05-20 2:12p NOTEPAD EXE 32,736 09-06-20 12:14p PRINTMAN EXE 43,248 09-06-20 12:14p PROGMAN EXE 115,312 12-31-93 6:11a PROGMAN INI 168 09-06-20 12:37p REG DAT 2,556 09-05-20 2:14p STARTUP GRP 44 09-05-20 7:52p SYSEDIT EXE 19,472 05-26-95 6:57a SYSTEM INI 1,501 09-05-20 7:52p SYSTEM <DIR> 09-06-20 5:38p TASKMAN EXE 3,744 09-06-20 12:14p WIN COM 44,170 09-05-20 2:12p WIN INI 3,424 09-05-20 2:14p WINFILE EXE 146,864 12-31-93 6:11a WINFILE INI 96 09-05-20 7:02p _DEFAULT PIF 545 09-05-20 2:14p 24 file(s) 468,330 bytes Directory of Z:\WINDOWS\SYSTEM . <DIR> 09-06-20 5:38p .. <DIR> 09-06-20 5:38p COMM DRV 9,280 12-31-93 6:11a COMMCTRL DLL 48,112 05-26-95 6:57a COMMDLG DLL 97,936 12-31-93 6:11a CPWIN386 CPL 104,816 12-31-93 6:11a DOSX EXE 32,682 12-31-93 6:11a DRIVERS CPL 41,440 12-31-93 6:11a GDI EXE 220,800 12-31-93 6:11a KEYBOARD DRV 7,568 12-31-93 6:11a KRNL386 EXE 76,400 12-31-93 6:11a LANMAN10 386 8,786 12-31-93 5:11a LZEXPAND DLL 23,712 12-31-93 6:11a MAIN CPL 148,560 12-31-93 6:11a MMSOUND DRV 3,440 12-31-93 6:11a MMSYSTEM DLL 61,648 12-31-93 6:11a MOUSE DRV 10,672 12-31-93 6:11a SETUP INF 60,594 12-31-93 6:11a SHELL DLL 41,600 12-31-93 6:11a SND CPL 8,192 12-31-93 6:11a SYSTEM DRV 2,304 12-31-93 6:11a TTY DRV 30,496 12-31-93 6:11a USER EXE 264,016 09-05-20 2:14p VER DLL 9,008 12-31-93 6:11a VGA 3GR 16,384 12-31-93 6:11a VGA DRV 73,200 12-31-93 6:11a VGAFIX FON 5,360 12-31-93 6:11a VGAOEM FON 5,168 12-31-93 6:11a VGASYS FON 7,280 12-31-93 6:11a VTDA 386 6,816 12-31-93 5:11a VTDAPI 386 5,245 12-31-93 6:11a WIN386 EXE 544,789 12-31-93 6:11a WINOA386 MOD 49,248 12-31-93 6:11a WSWAP EXE 16,302 12-31-93 6:11a 34 file(s) 2,041,854 bytes Total files listed: 58 file(s) 2,510,184 bytes 5,738,496 bytes free Rich -- Rich Cini http://www.classiccmp.org/cini http://www.classiccmp.org/altair32 On 9/6/20, 11:47 AM, "John Heritage" <john.heritage@gmail.com> wrote: Very nice! That's stackering the Win 3.11 boot disk itself? I am curious how much that compresses.. Also, would that work on a 'modern' PC - such as a Socket 7 system? (of ~ Pentium MMX era/vintage)? I have a K6-3+ BIOS modded Socket 7 system I use for fun. (OC'd to 75 MHz bus = 450 MHz). On Sat, Sep 5, 2020 at 8:33 PM Richard Cini <rich.cini@gmail.com> wrote: Ha, just pulled out a copy of Stacker 4.0 and compressed a floppy disk. 2.8MB free. That's a lot of room :-) Rich -- Rich Cini http://www.classiccmp.org/cini http://www.classiccmp.org/altair32 On 9/5/20, 7:28 PM, "Richard Cini" <rich.cini@gmail.com> wrote: Yeah, I thought of that too. I did this within Parallels on my Mac (so, going back and forth between Windows XP and MS-DOS 6.22 running as virtual machines) and Parallels doesn't support DMF (or anything other than 1.44MB). Neither does VirtualBox interestingly. It might be possible to do it on a real PC, but not sure. Yes, that extra 200k would make a huge difference in what could be included. Another way, that I haven't dried, is using Doublespace to create a virtual drive on the floppy. Rich -- Rich Cini http://www.classiccmp.org/cini http://www.classiccmp.org/altair32 On 9/5/20, 7:23 PM, "vcf-midatlantic on behalf of John Heritage via vcf-midatlantic" <vcf-midatlantic-bounces@lists.vcfed.org on behalf of vcf-midatlantic@lists.vcfed.org> wrote: How about using one of the extended disk formats - 1.68MB or whatever format IBM Used for their OS/2 floppies? or is that not bootable? (This format was at least readable by standard 1.44 MB drives using standard 1.44MB disks.. ) Interesting challenge ! On Sat, Sep 5, 2020 at 7:20 PM Richard Cini via vcf-midatlantic < vcf-midatlantic@lists.vcfed.org> wrote: > Not really sure what applicability this really has, but today’s challenge > was to get Windows 3.11 Enhanced Mode running from a single 1.44MB floppy > disk. There are easy ways to get Standard mode running, including using > files from “precopy.cab” on Windows 95 or 98, but this was way more > challenging. I started from a full install and pared it down using a guide > I found (which was a two-disk solution). > > > > The boot files and required extras (HIMEM, PKUNZIP and a very small > ramdrive driver) took about 300K, leaving only about 1.2MB (1.156MB to be > exact) for a complete install. A normal no-frills install is about 3-ish > megabytes. > > > > There are significant compromises – no virtual memory, no networking, no > multimedia, only system fonts, and only a few apps, but once running you > could run them from another floppy. I discovered that 386Enh won’t put a > temporary swapfile on a RAM drive, so it runs without it. > > > > I guess you could call this the 1992 version of PortableApps :-) > > > > Rich > > > > -- > > Rich Cini > > http://www.classiccmp.org/cini > > http://www.classiccmp.org/altair32 > > > > > >