M4 Board Amstrad CPC WiFi

breiztiger · **Publié :** 07 Jan 2017, 09:31

Citer :

M4 firmware v1.1.0 beta 10

Here is another beta firmware for M4 Board, please note this is experimental and mostly recommended for people who want to help me, by providing feedback.

This new beta focus on integration with AMSDOS, so you can use floppy discs and microSD at the same time.

You should ideally have AMSDOS or PARADOS as rom 7 (default) and put M4 in slot 6 or below. To use floppy discs, you should not use my modified lower rom (an alternative will come later).

At boot up everything is the same, if you wish to read your floppy discs, type:
|DISC
And all AMSDOS commands go to floppy drive, like |A, |B, |dir, cat, load, save etc.
To switch back to M4/microSD, type
|SD

If used without AMSDOS or with my patched lowerrom for CPC6128 everything should be the same as before, with some minor improvements.

Issues to be dealt with:
|TAPE, this will only work if you have AMSDOS (664/6128..) and type |DISC first
New Lowerrom mod to force initialization of both M4 rom when AMSDOS is.
Probably more...

Citer :

M4 firmware v1.1.0 beta 11

|era non amsdos style filename fixed.
Bad in/iout header bug introduced in last version fixed.
Should work with CPC464 and DDI aswell now.
|tape works
And a new feature added:
Remote Run, you can now type a filename in the webinterface and execute it (will be implemented in cpc xfer soon).
- Should be useful for faster development from PC to CPC, simply upload and run via cpcxfer.

http://www.spinpoint.org/cpc/M4FIRM_v110b11.zip

remax · **Inscription :** 11 Juin 2010, 12:49 **Message(s) :** 228

cyrillem a écrit :

bonjour

est-il possible d'installer un os genre futuros dans cette carte ou faut-il autre chose ?

merci

FuturOS ou SymbOS fonctionnent très bien.

SymbOS a même une version beta speciale M4 Board, et TFM m'a dit qu'il envisageait la même chose.

number-one · **Inscription :** 04 Oct 2016, 09:39 **Message(s) :** 9

Bonsoir,

Comment on fait pour utiliser la Modified lower rom for CPC6128 de http://www.cpcwiki.eu/index.php/M4_Board ?

Je n'arrive pas à lancer Super Cauldron (UK,F,G) (1993) [Original].dsk

dirtybb · **Inscription :** 28 Juil 2014, 15:55 **Message(s) :** 51

Citer :

Firmware v2.0.3 release version ready.

For users who have not upgraded to v2.0.3 beta, you can simply use |upgrade command.
If you use v2.0.3 beta 1 or 2, you must manually download the firmware and unpack the files to root of your microSD.

Following small fixes was added since beta 2:

Fix autoexec.bas launching when soft-resetting inside a .DSK (@00WReX).
Fix |cd into .dsks with write protection attribute set (@SOS).
Fix web interface remote run for filenames using html encoded characters (@Maniac).
Fix |M4help, using all screen modes, doh (@HAL 6128).

http://www.spinpoint.org/cpc/m4info.txt

Princesse Mariana · **Publié :** 19 Mars 2018, 08:12

Citer :

M4WIFI firmware v2.0.4:

Added |ctrup and |ctr RSX for CPC plus owner, giving the ability to launch cartridge images.
Fix parsing bug when file not found
Many DSK fixes, now games like Chibi Akumas show loading screen (again), games with fragmented blocks work (ie. Ninja Grannies)
WEB UI, now you can pick "CD ON CPC" when using file browser or from Control, to change the directory on CPC itself
Besides using the webui a http req (ie. wget) can also change directory like this: http://ipnum/config.cgi?cd2=/DEMOS or even into a DSK file.
[..] in the file browser was changed to [BACK] and [.] to [REFRESH] to make it more obvious.
|ls now supports DSK images too (will probably garbage up if using ascii art though).
|httpget will use attachment filename, rather than url if present.
New command |dskx. With this you can extract dsk images to files. Usage |dskx,"somedisk.dsk","/mypath" and all files are extracted to given path.
CPC+ init. no longer clears screen.
Fix downloading files from the WEB UI
Support 512KB cartridge images (mainly used by CPC+)
Added option in web interface to downgrade romboard to 16 roms, to be able to fit 512 KB cartridges.
Added option to upload & start cartridge images via web interface.
Set DHCP hostname to netbios name.
Fix crash when using run" without filename multiple times.
Improve timings of ROMDIS.
Only test IO bit 13 for rom selection (as CPC seems to do), was 0xDF.
Fix Reset (clear rom state).
Change remote Reset, M4 reset & pause to acknowledge (IPC) commands or they could sometimes be ignored.
Updated ESP side SDK base to latest (v2.2.0), with whatever fixes that comes with it (ie. WPA/WPA2 vulnerability issue).
Fix Remote .sna for long filenames.
Fix for loaders using BE7D to restore drive letter (not checking if it is 00 00).
Change Amsdos workram 0-2 (ie. A700-A702) to 0 when using |SD and restore when using |DISC (only if AMSDOS or PARADOS present).
DSK: Do not show files with system attribute set. (makes better catart too).
DSK: Show '*' after file with "Read Only" attribute set.
DSK: Do not reject strange sector numbers (like AMSOFT disk protection).

V2.0.5

Fix CPC+ cartridge issue with demos Eerie Forest & CRTC3 (and maybe others)
Fix issue with certain Amsoft games
Fix rom issue.
Fix SNA pen 0 bug.
Fix SNA screen mode bug.
Added SNA v3 (compressed sna's) support.
Fix for upgrading ESP firmware (do not erase if CRC does not match).
Added |ROMSOFF command
Added upgrade report.txt (useful for diagnosing, upgrade problems).
Added Hack Menu, now you can save snapshots while playing games etc.
Fix DSK file size 0 bug
Fix |longname / C_FSTAT bug, now (again) displaying long filenames properly.
Fix Hack menu - Slowdown keyboard reading.
Added Hack menu - Support full keyboard character set (QWERTY only for now).
Added Hack menu - Pokes
Added Hack menu - Display memory
Fix Hack menu - Flaw in IM 2 detection.
Fix Hack menu - Resume "some games" (Pinball Fantasies, atleast on my one CPC).
Added Hack menu - AZERTY keyboard support (Huge thanks to @dxs for the painful keymap table! And thanks to @ZbyniuR for the keyboard detection method).
Added ability to launch Hack Menu with an external button.
It requires to solder two wires to the M4 board PCB (the wifi module).
If you install this, it is at your OWN risk. You can also just launch hack menu from the Web UI.
Instructions are here:
http://www.spinpoint.org/cpc/m4hack1.jpg
http://www.spinpoint.org/cpc/m4hack2.jpg
Fix file output of Maxam "write" command
Fix |HTTPGET strip "http://" from URL if used
Fix |HTTPGET freeze when URL does not resolve (2 sec DNS lookup timeout)
ADDED |HTTPGET use @ symbol at start of request to silent output text of console, ie. |httpget,"@spinpoint.org/cpc/m4info.txt"
ADDED |HTTPGET use > symbol followed by filename at end of request string to output into desired file, ie. |httpget,"spinpoint.org/cpc/m4info.txt>info.txt"
ADD C_NMI command to trigger NMI/HACKMENU from z80 code for debug
Fix WEB server missing HTML escape tags in files upload page.

src: http://www.spinpoint.org/
url: http://www.spinpoint.org/cpc/M4FIRM_v204.zip
url: http://www.spinpoint.org/cpc/M4FIRM_v205.zip

Princesse Mariana

Citer :

M4 Board firmware v2.0.6 released.
Download here: http://www.spinpoint.org/cpc/M4FIRM_v206.zip and unpack to root of microSD, then power cycle the CPC with microSD inserted.
If you have not used any v2.0.6 beta, you can use |upgrade instead.

Changes since v2.0.5:

Fix bug in |FCP corrupting (amsdos) files when transfering from microSD to DISC. (Thanks @Kukulcan)
Fix |ROMUP issue (multiple rom upload)
Fix for NMI/HACKMENU (internal)
Fix maybe other smaller issues I have forgotten about.

src: http://www.spinpoint.org/

Princesse Mariana · **Publié :** 08 Mars 2021, 08:28

Citer :

M4 Board firmware v2.0.7 released. (updated 2021-03-07)
Download here: http://www.spinpoint.org/cpc/M4FIRM_v207.zip and unpack to root of microSD, then power cycle the CPC with microSD inserted.

Changes since v2.0.6:

Changed behaviour of RMR "ghost" register to support FutureOS and IMPdraw running from ROM on Amstrad PLUS.
Added C_ROMLOW command to map in and out lowerrom(s). See under developer info.
NMIROM.BIN is now loaded from microSD card root by default, if present, otherwise internal HACK MENU is used.
New HACK Menu improvements by Cebe74 (Thanks!):
Reorganized layout
Menu keyboard shortcuts
Memory dump feature

Princesse Mariana · **Publié :** 01 Oct 2025, 18:55

Mauvaise nouvelle ...

Citer :

After nearly 10 years and close to 1500 pcs, I have decided to stop producing the M4 board.
Finding time and motivation for builds has become increasingly challenging, and more EU bureaucracy starting October 1st was the final nail in the coffin.

Demand for the M4 board remains high, and I'm sorry to all those requests I haven't replied to recently - I was waiting to make this announcement.

My apologies also to those on the waiting list, I won't be able to build.

I have released the Gerber files, BOM and bootloader on my GitHub here:
https://github.com/M4Duke/m4hardware

If anyone wants to build them or make their own, you are welcome to do so.

The heartfelt feedback from so many positive people has made the countless hours spent placing 0603 caps and resistors and removing solder bridges, less painful. ??

Thanks all.

Stay strong!

/Duke

norecess464 · **Publié :** 01 Oct 2025, 21:20

La M4 est une carte vraiment populaire, donc oui c'est triste et cela aura forcement un impact.

La bonne nouvelle, c'est qu'avec 1500 pieces produites sur 10 ans (!!) je suppose que la plupart des membres dans la communauté active ont déjà eu leurs cartes. Elles ne vont pas toutes disparaitre demain.

Il faut vraiment remercier Duke pour son excellent travail. :biere:

stephbb75 · **Publié :** 01 Oct 2025, 21:30

Salut,

se n'est pas forcement un mauvaise nouvelle vue qu'il publie de quoi la faire, cela est même une bonne nouvelle en fait.
C'est sur que cela doit être un sacré boulot de les faire.
Il est même possible que certain la fabrique et le vende moins chez, a voir.

Ce qui est un peut dommage c'est que les source ne sont pas dans le dépôt, se ne sont que les binaire.
Ce qui aurais peut être permis que le projet évolue encore...

EDIT:
Ha si c'est publié mais dans d'autre dépôt, donc à première vue il y a tout pour faire évoluer.

stephbb75 · **Publié :** 02 Oct 2025, 21:47

Salut,

Bon, Fletch sur Discord (il fait pas mal de montage pour les vielles machines) vas surement faire des M4.
Si cela intéresse qq'un je filerais le lien de sont discord....

krusty · **Inscription :** 02 Sep 2012, 19:25 **Message(s) :** 33

Hello

moi ça m'intéresse le lien pour en acquérir une seconde dans les mois qui viennent.

en tant que cross-développeur, la M4 est la seule et unique extension qui me convienne : elle me permet d'envoyer des snapshot sur un CPC, sans fil, sans que je touche le CPC

Je n'ai jamais trouvé d'équivalent ailleurs (et je m'en tape royalement qu'elle interrompe le z80 pour travailler )

M4 Board Amstrad CPC WiFi

Qui est en ligne ?