esxDOS BBS

UnoDOS 3 update

2026-04-05T11:39:09Z

As you're probably aware, when I started writing SE Basic 4.2, not being able to see inside the esxDOS code became a real problem. So I used the same techniques that I'd used on the Spectrum ROM (to create SE BASIC 1.0) on esxDOS 0.8.5. I got source that would build a working binary. But it was still mostly a black box. I fixed the things I needed to fix for my purposes. UnoDOS 3.0 aimed for feature parity with esxDOS 0.8.5. But no-one really used it. And I wasn't trying to replace esxDOS (I deliberately did not support divIDE devices). So in UnoDOS 3.1, I removed all the Spectrum-specific features, leaving only the kernel (which is what I needed for SE Basic 4.2). But one of the aims of the Chloe computer is to be fully open source, and uncommented source isn't very friendly. So a couple of years ago I split the source into modules (much like SE Basic itself). Today I revisited that branch and I've had AI go over the source and make it fully understandable by humans. This will be published as UnoDOS 3.2 as part of Chloe System/2.

I mention this because I'm grateful to all those who created esxDOS 0.8.5 in the first place. The copyright message states (c) 2005-2013 Papaya Dezign - All rights perversed. The terminating clause has no legal standing, which leaves esxDOS as closed-source proprietary software owned by Papaya Dezign. The technique used to create UnoDOS 3 has been around since 2011, and has been used in commercial projects, such as the ZX Touch. So I'm confident that UnoDOS 3 is legal open-source software. But I don't think anyone is actually going to use it on their Spectrum. The source may be of interest to the curious, but esxDOS is now on version 0.8.9 and the UnoDOS source won't give much insight into that. Maybe at one point it might have made it easier for people to create new OSes for divMMC, but SpecNext seems to have co-opted all esxDOS development work (and locked in 0.8.5 as the defacto API standard). I hope we still get an esxDOS 0.9.0 some day, and maybe even an esxDOS 1.0 (with a new API).

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2026-02-06T07:23:19Z

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2025-12-27T13:21:31Z

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.DOT-Command for loading Snapshots emulation TR-DOS "GOTO "@" Code

2025-10-12T13:16:14Z

Hello,

maybe you could think over adding a .DOT-command for loading created on original Betadisk 48 / Betadisk 128 Interface with the "MagicButton"? Those Snahsot are loaded from TR-DOS with

GOTO "Snapname" Code

Here a have a .TRD-Disk with a Snapshot of the Game "Bounty Bob strikes back", booting OK on TR-DOS v4 and TR-DOS v5, but not on divIDE with esxDOS this .TRD-Image mounted with esxDOS .vdisk Virtual Disk:

TRD-Fiie: https://spectrumcomputing.co.uk/forums/ … hp?id=2270

Topic discussed here: https://spectrumcomputing.co.uk/forums/ … 55#p179555

Unofficial DOT-commands for esxDOS

2025-05-14T07:29:24Z

in https://esxdos.zxfiles.net/ I learned that the 7zip archive has Unofficial DOT-commands for esxDOS. How do I install them into my Divmmc 0.8.9 environment and make them work?

Dot command to pass IO information to a basic vairable

2024-09-30T16:56:14Z

Curious if this is currently possible or implementable. To a limited degree this appears possible on a Next but would like to know if something might come to light on DivMMC etc?

Thanks in advance

new esxDOS utilities - Summer gifts from ub880d - .udged .PRNCAP ...

2024-09-11T18:35:52Z

As seen on: https://spectrumcomputing.co.uk/forums/ … mp;t=12058

new esxDOS utilities
Post by SamC » Sat Sep 07, 2024 9:31 pm
Summer gifts from ub880d :dance

https://oldcomp.cz/viewtopic.php?f=37&t=12876
Game Selector
Download: https://oldcomp.cz/download/file.php?id=19646

https://oldcomp.cz/viewtopic.php?f=37&t=12892
.udged - jednoduchy editor UDG
Download: https://oldcomp.cz/download/file.php?id … 8ba84d86ce

Printer emulator
dot-command .PRNCAP
see help, with a switch -h
more info:https://oldcomp.cz/viewtopic.php?f=37&t=12885
Download: https://oldcomp.cz/download/file.php?id=19543

Loading ESXDOS.SYS error

2024-03-12T13:24:24Z

I'm trying to run esxdos on my ZX NEXT. Tried 0.8.9, 0.8.8 and 0.8.7 and with all those I get the same result:

- after setting everything correctly according to guide:

1) ESXDOS screen appears
2) "Detecting devices..." - this lasts quite a moment, like 10 secs or sth
3) "Mounting drives..." - this comes up next, with no info about mounted drives or anything following
4) "Loading ESXDOS.SYS... [ERROR] - this comes up finally, then zx resets (black screen, then white screen)

Dirve not mounted, not working.

My suspicions:
I have lot of files on the sd card (like several folders with games, demos etc) - maybe there is some limit?
Most of those files have long names - maybe there is some broblem?

Any other ideas? Is there any crashlog I could retrieve?

Why still no open source?

2024-01-25T21:28:45Z

Hi there.
Playing with my ZXS again after a while. Embedding successfully AY music circuitry inside my ZXS+ 6a case.
Preparing my own KiCAD pcbs data (the manufactured and proven functional) to make it open source at my github profile and I am asking myself wastefully - why the heck these ZX Spectrum, DivIDE, ESXDOS community still doesn't live in the awesome open source world????

We have awesome operating systems wit 6 000 000 lines of code available as open souce (linux of course).
We have great PCB software as open source (KiCAD of course).
We have great 3D modeling software as open source (FreeCAD).
We have video editing software as open source ...

Why are still people here who think it's better to hold the sources away from users in the ZX Spectrum community?

There is business potential no more. Nobody is going to stole your ideas.

Totally uncomprehensible for me.

I hope it'll change sooner rather than later.

Cheers

Jakub Ladman

Divmmc not working and cant flash

2023-11-12T12:59:07Z

I have purchased a Divmmc Future. And when i insert it into a spectrum+3 with no card inserted. The machine boots to the selection screen. When i insert the sd card (that i purchased along with the Divmmc Future) I get a screen with blocks and lines on it.
I have loaded the flash firmware 0.8.9 via the tape lead. but when i press enter it says CANNOT FLASH DIVIDE ERROR.

I know i am supposed to remove the sd card to ADJUST FLASH FUSE JP2/E. But i cant do this. As i insert the sd card the machine crashed to the blocky screen.

Is there any other way to flash repair this card ???

Any suggestions very grateful.

Belarussian БАЙТ (BYTE) & DivMMC

2023-10-06T03:43:10Z

Hello,

I am trying to get DivMMC to work on the Байт (Byte) clone of the ZX Spectrum. I've designed a converter board to convert the BYTE's 96-pin Soviet-era expansion connector (СНП59-96) to a Speccy's usual edge connector.

With some additional patching, it is *almost* working. The BYTE has two modes - one is supposedly "ZX Spectrum compatibility" - so this is the one I'm trying.

It tries to boot but fails with:

Loading ESXDOS.SYS... [ERROR]

I have freshly formatted a 16GB SDHC card using the official SD Formatter (I'm using a Mac) and copied contents of 0.8.8 release across.

Any suggestion?

Thanks, Brett.

DivIde Plus

2023-07-04T21:17:59Z

Hello everyone, does anyone know how I can flash esxdos 0.8.9 on a DivIde plus?
Greetings

Request for a DOT-Command to report if file or directory exist

2023-04-13T15:52:47Z

Here´s my request for a DOT-Command e.g. called ".ifexist" to report if file or directory exists.

I need it under NextBASIC, and there´s no BASIC built-in command for doing this query from NextBASIC yet.

Thank you!

Help on DIVIDE 57c and ESXDOS

2023-02-26T08:15:25Z

Hello to all!
I have a question for some expert : i own an old DIVIDE 57c, working good.
And i have two Speccy ,a gummy rev 3 and a PLUS with rev 6a.
On the 6a DIVIDE works with all "firmwares", included ESXDOS.
On the rev 3 DIVIDE works perfect with fatware or other firmwares but NOT with the ESXDOS (not boot and weird things happen, blocks on video, reset, etc..etcc..) What can be the reason ?
Tried all versions , from old 7.x to las 0.89 : same not working with the rev 3 !
Not a big problem because i can use fatware .14 for loading games but i dont'understant the cause.
Both 48k speccy tested for ram faults. Both working perfect with IF1+microdrive+ joy interface...
Both loading well tapes, sound and all, so ULA seems ok.
I repeat fatware or others divide firmware are working also on the rev 3 speccy...
Strange ?
THANKS !

PS: i add that divide is working good also on my 128+2 with esxdos...

Load a modified 128K ROM and make divMMC work in 128K Editor and Basic

2023-02-10T12:24:32Z

From Facebook-Group "DivMMC and DivIDE interface for ZX Spectrum and Sam Coupe":

Mario Prato:
Hi Guys,
I recently added a new feature into the divmmc cpld, allram mode, it makes possible to map ram into the first 16K instead of speccy rom, this memory may be also write protected to act like a new rom and automatic mapping can be disabled too.
See the videos, now it's possible to load a modified 128K rom from Velesoft and make divmmc work in 128K editor and basic (dot commands are ok). Or we can load a +3e rom for divmmc (in the video I load Workbench +3e).
I know there are lots of different divmmcs and this firmware is only for the ones that follow my original schematic (Ben's for example).
Jedec file is on my github page, source will be avalaible soon: https://github.com/mprato/DivMMC

Videos are in Facebook, and not in Youtube, so I can not post Youtube-Links here.