As have been drawn to my attention, many M4 board owners are asking for easier documentation than my crude instructions here.
Fortunately several great people have created helpful guides, reviews and documentation already. A huge THANK YOU guys!
First a series of excellent articles in Spanish from AUAmstrad website/group:
https://auamstrad.es/hardware/m4-board-configuracion/
https://auamstrad.es/hardware/m4-board-gestores/
https://auamstrad.es/hardware/m4-board-hack-menu/
https://auamstrad.es/hardware/m4-board/
Extended User Manual in English by Csaba Toth (added 2024-10-31).
https://www.spinpoint.org/cpc/Amstrad_CPC_M4_Board__Extended_User_Manual.pdf
First look and adding ROMS to the M4 board on Amstrad noob (added 2021-04-23):
https://www.amstrad-noob.com/2021/04/23/first-looks-at-the-m4-board-for-amstrad-cpc/
https://www.amstrad-noob.com/2021/04/23/adding-roms-to-the-m4-board/
Videos:
In French with English subtitles by StephBB:
In Greek by Vincent GR:
Review by Chinnyvision in English:
In Germany from Jungsis corner:
Review and early setup by Am Strad in English:
And a guide in Spanish by Professor Retroman, that I linked to before:
Video for using the M4 board by Amstrad-noob.com in English (added 2021-04-23):
In Polish by RetroGralnia (added 2023-02-04):
Also Mr. DVG over at the cpcwiki forums compiled a collection of 1300 games tested and working with M4 board!
If I forgot or missed a useful resource, please do not hesitate to make a comment, so I can add it to this post.
Thanks again, all of you for your dedication, hard work and support!
Hi Duke,
Thank you for making this wonder my deepest admiration!
I would like to order one for my CPC6128 plus if possible, could you please tell me how?
Regards.
Thanks 🙂
Email sent.
Hello Duke I would love to have one board of yours for my Amstrad CPC6128
HEllo Duke, don’t know how to open a new thread…
I’m interested in buying an m4 or m7 board if you still build then and read this.
greetings
Pablo
Hey Duke
How does one order one of these?
Hi Duke
Did you see this message as I don’t believe I ever received a reply. Unless my email blocked it or something.
Hi James,
Looks like I somehow missed it – Sorry.
Email was sent to your new email address, please check junk/spam if you did not see it.
/Duke
Hello Duke
Where it’s possible to buy M4board wifi for amstrad cpc ?
Many thank’s for your great job
Best regards
Thanks. Email sent.
Hi Duke, are your M4 boards still available?
Hi duke, I’m looking for a M4 board. Could you help me?
Thanks
bonjour DUC
j’aimerai acheter un M4 Board pour mon cpc 6128
MERCI d’avance / mail perso /
merci
Hi Duke, are these still available. I’d to have one for my 464! Price not really a problem. Many thanks
I would also be very interested in buying an M4 Board for my 6128!
hello, how can I buy this wonderful little card? I can search everywhere but I can’t find links for it
Hi Duke.
I’m insteresting with the latest version of M4 for my Amstrad CPC 6128 (not “plus” !) with a Centronic connector.
Can you contact me please ?
Thanks.
Hi Duke
Please let me know how o order one M4 board for an Amstrad CPC-6128 computer.
Best regards
Hi Duke
I would like to know how to order one M4 board for an Amstrad CPC-6128 computer.
Best regards
Hi Duke,
I would like to order a me board for amstrad cpc6128.
Kind Regards
Aurelio
Hi, how to buy one ? 🙂
regards,
Thanks Duke.
I would like to order another M4 unit.
How can I proceed?
Regards
email sent.
——– Translator GOOGLE:
Hello Duke.
I would like to order an M4 card.
Can you tell me how to do it for France?
Thank you
cordially
———Original:
Bonjour Duke.
Je voudrais commander une carte M4.
Pouvez vous me dire comment faire pour la France?
Merci
Cordialement
Email was sent.
Same to everyone else who commented.
If you did not receive my email, check your SPAM/JUNK folder.
Or write me here again.
Hi Duke, I didn’t know how to find you, I would need to buy an M4 with wifi and sd for Spain, would it be possible?
Hello!
I Want to Buy one M4 board to use with my Amstrad CPC.
Hello Duke!
I Want one M4, it looks really good and I’m building my Amstrad collection, and this will to wonders.
Please contact-me, I left two messages because I think I put my email wrong at the first time.
Hi
I already emailed you at that email address (same as before).
Please check your JUNK/SPAM folder if you have one.
You can also just email me direct at duke(a)spinpoint.org
Regards,
Duke
Hello!
I want to buy one M4 board wifi/sud card to use with my Amstrad CPC 6128.
Thanks you
Fab
Hello Duke
Very impressive and fantastic board! Nice grate job!
I am interested in one M4.
Thanks.
Email sent.
Hello Duke,
I’m also interested in one M4.
Thanks you
Emeric
Email sent.
I would very much like to purchase an M4 Board with Edge connector for my CPC6128.
I’m in the UK so could you please send me a price?
I already sent you an email 2nd of April, please check your junk / spam folder.
I will forward it again.
Regards,
Duke
Hi Duke,
I would like to get one M4 for my CPC if possible. Could you tell me price and shipping costs to Spain, please?? Thank you!!
Hi, I’d like to get one of the M4 boards for a CPC 6128 Plus.
I’m in the UK.
Thanks.
Hi,
Jumping back to Amstrad world and c programming … need your board.
I will use it for either 464 (basic) or 6128 plus
Leaving in Finland.
Please contact me for price and shipping.
Great job!
Hello Duke.
I would like too to order an M4 card.
Can you tell me how to proceed for France?
Thank you
Email sent.
Hello,
Congratulations, you have done an incredible work.
I would like to know how to order one M4 board for a CPC 464 computer
to Spain.
Thank you!
Thanks!
Email sent.
Hi, vincentGR sent me this link.
I need M4 board with cpc 6128 setup .
Thanks.
Hey Duke, please send to me info on how to order an M4. Thanks, Steve
Hi! I would like to buy one M4 for my 6128 plus. Thank you!
Hi Duke. I’m sure you’re very busy with requests like this, but I would be very interesting in buying an M4 board for my 6128, and also an Imperium Solo.
If they are still available, please could you send me details on how to order one from you?
Thanks very much,
Steve
They are still available, lead time is about 5-6 weeks after order confirmation before I can have them ready.
Email sent.
Hi Duke,
I’d like to buy a M4 for my UK CPC6128 with edge connector (Not Plus). Please email me details. Thanks.
Hi, i’m looking to buy an M4 board too, where can i found it ? Thank you
Hey there, I am also interested in buying a M4 board for Centronics connector. TIA
Email sent.
Hi, is there a terminal program usable with M4? Which escape/control-sequence are eventually supported?
There is a very simple telnet client I wrote as example, it is only partially compatible with some servers. You can check out the source code here:
https://github.com/M4Duke/M4examples/blob/master/telnet.s
There is also a telnet client with SymbOS, that is much better. -> http://www.symbos.de/appinfo.htm?00020
Hi Duke, I would really like to order one for my 6128. Postage to Australia please.
Awesome project!!!
Hi there,
I have a standard cpc 464, I’m interested in one of these but afraid I’ma little out of my depth. It’s just to play games from on sd card that I need it for?
Not sure what connector I’d need too sorry?
Thanks
Email sent, but no reply. Please check your junk/spam folder.
Hi Duke,
I’d like to buy an M4 board for my CPC6128.
Based in the UK.
Cheers,
Hi. I’d like to buy an M4 board for my Amstrad 6128 Plus. Thanks
Hi. Looks great, I can’t find a buy page. So could I get some more info on buying/shipping ?
Thanks!
Yes, sorry there is no buy page, people just message me here and I email them back with the info’s.
You’ll receive an email shortly.
Hi Duke, I would like to buy an M4 board for my Amstrad CPC 464. Thanks!!
Hi Duke,
The M4Board is incredible! I would be highly interested in buying one board, for a 6128Plus.
Best regards
Nicolas
Hi Duke,
I’m interested in buying an M4 board – looks great.
Warren
Hello!
I would like to enquire about getting an M4 for my 6128.
Hi, is it still possible to buy one of those ?
Thanks
Hello
I would like to get one, but I haven’t found a form to order one.
You can write me.
Hi
There isn’t any form. You just put a message here and I email you back.
Will email shortly.
Regards,
Duke
Hello!
I just discovered and started reading about M4 board and I like also to get one for my CPC 6128.
Many many thanks!
Hi Duke, I would like to buy an M4 board for my Amstrad CPC 464. Thank you.
Hi Duke,
I’d love to own one of your M4 Boards, could you let me know how I can order please?
Email sent.
I am interested in one of those M4 boards. It’s for a CPC6128 with edge connectors. PLS contact me.
Hi Duke
I’m also interested in a M4 board. Being new to the Amstrad computers: I’m currently owning a CPC464 but want to add a CPC6128 to my collection later this year. Is it possible to connect this board to the CPC464 and also the 6128, or do I need some adapter?
Looking forward hearing from you…
Regards
If the new CPC6128 is a regular Amstrad then it uses same connector as a CPC464. If it is a Schneider CPC6128 or a Amstrad 6128 PLUS they use centronics connector.
If you stick with option 1, what you need is:
M4 board with EDGE connector
For option 2 (to work on both EDGE and Centronics connector), you will need:
M4 board with IDC connector
IDC to Centronics Cable
IDC to EDGE adapter
Email sent.
Hello,
I would like to buy an M4 board with edge connector
Regards
Hi there!
I have seen your M4 Board wifi/sd for Amstrad trought AUA web with a friend, and we want to buy you one or two of these boards.
And, do you have the MX4 board too?
Can you sell and send to spain? Do you know how much it cost aprox?
Thanks for your time,
best regards
Hello. How can I buy an M4 Board?
Hi,
Are you still making these? If so how much?
Thanks in advance.
Mark.
Hi Duke, will it be new units on sale soon?
It doesn’t look like it, I am afraid.
The chip shortage hit the smaller guys the most, there are no available chips at all :/
Hello Duke I would love to have one board of yours for my Amstrad CPC6128
I would like to buy the M4 board when it becomes available again. Can I pre-order?
I’d also be interested in an M4 board, for use on a Plus machine. Guess I’ll just leave this comment here and hope that the chip shortage eases up and another run gets made at some point in the near future 🙂
Dear Duke
I would like to buy an M4 Board Wifi card to connect my Amstrad CPC online. Can you please email me details?
Kind regards
Dimitris
Hello,
I would like to buy a M4board for Amstrad Just CPC 4 designed by Zaxon. What would be the cost of shipping to Poland?
Hello Duke, I am interested for your card for my Amstrad cpc6128. I am waiting your email with details. Best regards, George.
Hi Duke, your M4 is a great board for cpc!
I would really like to have one, how can I order?
thanks
Hi,
If it’s still possible, I would like to buy an M4 Board Wifi card (with IDC connector for a slot extender). Can you please email me details when it becomes available again? Thank you in advance.
With regards,
Sil
Hey duke,
Hope you are doing well in this troublesome times.
Do you still sell M4s?
I would need one compatible with the MotherX4 …
Can you please reach out to me to discuss options?
Hi,
Looking to buy an M4 board please. Located in Brisbane, Australia. Thanks!!!
Looking to get an M4 board in the UK if they are still being produced.
Will you create M4 board for amiga 500 as replacement of the disc drive?
@Francois – I have no plans to do that.
Hi,
I’d also like to get one of the M4 Boards for my CPC464.
Is there an onlineshop somewhere, or do you still produce in batches?
Thanks a alot!
Cheers
Uli
Hi,
If you’re still making them, I’d also like to be added to the list for an M4 board for my 6128.
Many thanks,
Richard
Hello, your M4 Board interests me, I would also like to have an M4 board for my CPC 6128. Is it possible to order one please?
Cordially
also i would be interested in the CPC Joystick/USB- Adapter incl. splitting Power cable if needed for CPC464. 🙂
greetings
Hello, I’m having this problem, out of nowhere my M4 board stopped booting normally, I tried the following:
– change sd card
– reprogram the firmware with different versions
– use another CPC
The reprogramming leaves this report:
M4 Firmware version 2.0.7
ESP firmware v2.0.7 found.
ESP flash: 0x00E04016
ESP CRC match: 0x366BCBEF
Programming…
ESP programming success
but no M4 information in the screen with or without the sd card.
Can you please help me?
Also if there is a chance to order a new board (2019 version) I would like to proceed. Let me know if it’s possible.
Thanks!!!
Hello Duke, I am interested for your card(M4 Board) for my Amstrad CPC6128.
Can you please email me details?
Best regards, Christian.
Hi. I’m interested in buying an M4 board for my CPC6128. Are you still selling them?
Thanks
Hiya
Would very much like to buy this board with edge connector for my cpc464.
Please let me know how do I proceed
Hi Duke
Love the project – looks very impressive…
I’d be interested in one of your M4 boards for cpc464 if you could pm me
Thanks
Tony
Hi !
I’m interested in a M4 and everything needed to connect it to my CPC 464. Can you tell me a price including shipping to Germany ?
Thanks
Mathias
hi Duke im interested in an m4 card.
Hi Duke i’ll be interested in an M4 card, if it’s still possible. Thanks !
Hello Duke,
I recently discovered the M4 Board and I think it’s fantastic. I would like to have one for my Amstrad CPC, would this be possible?
Congratulations on your fantastic work.
Greetings and thanks!
Hi Duke
I’m interested in an M4 for a cpc6128
Is there any available ?
Hi,
I’d be interested in purchasing an M4 board for a CPC 464 please.
Could you please contact me with details of how to place an order?
Thanks very much,
Shane
Hello!
I am interested by the m4 and the imperium solo.
Would you be so kind to get in touch?
Many thanks
After I tried to update M4board using fresh firmware on the SD card the CPC won’t boot (black screen). Is there a way to debug what’s happening (serial console)? What’s the process of un-bricking m4b?
When upgrading a report.txt file is generated in the root of the microSD cards, which has info about the upgrading process.
Try to format your microSD card, copy the M4FIRM.BIN and ESPFIRM.BIN into the root directory of the card. Insert to M4 and power it up.
Wait several minutes and it should restart itself.
Afterwards the files M4FIRM.BIN and ESPFIRM.BIN should be deleted automatically.
In short the M4 has a write protected bootloader, so it should always be able to recover from microSD card upgrade files.
Hello,
I’m interested in an M4 for cpc 6128.
Thank you for your great work.
Best regards.
Hi Duke,
I’m interested in an M4 board for cpc 6128 plus.
Is it possible to order one?
Thank you!
Best regards.
Hi,
I’d be interested in purchasing an M4 board for a CPC 464 please.
Could you please contact me with details of how to place an order?
Thanks very much,
Shane
Hi Duke,
I’m interesting for buying some M4 Board for a cpc6128.
What can I do that ? 😉
Thanks,
Laurent.
Hi Duke,
I’d love to get an M4 board for my CPC 6128, I’m in the UK. Are these still available?
Thanks,
Simon
I would like to order one for my Amstrad CPC6128 if possible, could you please tell me how?
Regards.
Hello Duke,
I would like to buy an m4 board for my schneider cpc 6128 and possibly an adapter for a schneider cpc 464.
Regards.
Hi Duke,
Are you still here? Please say yes!
I’d (and as you can see, many others) would love to purchase one (or more) of these for our 464s & 6128s.
Could you please just give us an indication that you’re still around and if you’re willing to construct more of these?
Yours,
Steve
Yes, I am still here. I email every one of you. If you have not received an email reply within a week, feel free to message me here again – probably check junk/spam folder first.
Steve, email coming shortly.
Hi Duke,
I’m interested in buying an M4 board for an Amstrad CPC 464.
Thanks and regards,
Neil
Hi Duke,
I’m also interested in buying the M4 board for my Amstrad CPC 464 with shipment to Poland.
Regards,
Parys
Hello Duke,
M4 board desperately needed here. 🙂
Pls let me know how to order if possible.
Cheers,
Folko
Hi
I’m very interested in buying one of these, looks great. Can you pm me if you still have them available?
Cheers
Hi Duke! I’ve been amazed by my M4 since the day it arrived! It’s a phenomenal piece of work 🙂
Is the source for the code running on the ESP8266 and Cortex M4 available? From what I’ve found on GitHub I can see the Z80 code that runs on the CPC, but not the code that makes up the M4FIRM.BIN / ESPFIRM.BIN files.
Thank you so much!
Andy
Hi Andrew,
Thanks glad to hear it is being put to good use 😉
I have not made the source code for the ESP and M4 available – maybe some day.
Regards,
Duke
Hi Duke, thanks very much for getting back to me!
Glad I wasn’t missing anything obvious! I’ll keep an eye out if that day appears 😀
Meanwhile, it looks like the M4 has been in production for a longer time than the CPC464! That’s an amazing milestone, congratulations for supporting the M4 for so long!
Hi Duke,
I’m interested in buying an M4 board. Please, let me know if it is available. Thanks.
Regards from Spain
I’m interested in purchasing one of these – can you ping me. thanks tony
Duke –
Are you still making these boards? Definitely would like to purchase one for my 6128.
thanks
Hi,
Using my board I would like to know how to download the files from the board back to any PC. This for backup purpose or to use with an emulator.
Off course, taking the SD Card away is an option…but just from time to time and not twice a week.
Thank you.
Pressing any file in the web interface should make it download to the PC.
hello Duke, I am willing to buy this amazing piece of hardware for my CPC 464. Drop me a line please.
Hello Duke,
Need an M4 if possible/add to waiting list.
Add me to the list for one maybe two. And sent to Australia.
Thanks…
Dear Duke
Would you please add me to the wish list. My cpc 464 and 6128 are waiting for the magical stuff
Best regards
I already sent you an email, please check junk/spam
Hello Duke,
Do you still make m4 cards?
If so, I would like to buy it for a 464 machine.
Thanks a lot!
Hi Duke!
I have an amstrad 6128plus and I’m using just plain old flopies (the few i have left 🙂 )
Would love to purchase one of your M4 units for connecting to plus machines, if you happen to have one around, or are preparing one batch 🙂
Thanks!
Today I unpacked some old cardboard boxes and found my old CPC6128… it must have been wrapped up for 25 years – maybe longer…
A bit of Googling for nostalgia and I stumbled across this site. Could it be possible to bring it into the modern world?
I’m very excited about the prospect
oops, I hit send too quickly…
please can you email me with the purchase instructions for the M4?
Hi Duke,
Great work ! I’d like to get an M4 board for my CPC 464. Could you kindly send details – I’m in Melbourne, Australia.
Many thanks,
AndyB
Hello Duke,
I would like to purchase an M4 board for my CPC464,
please could you send me details
Many thanks
David
Dear Duke,
I would like to buy M4 board for my Schneider CPC 464 (not plus).
Please send me the details.
Thank you very much in advance
I’m interested in buying an M4 board. Please send me the details how.
Regards,
Paulo
Hi everyone,
I have recently entered the world of retrocomputing with a Schneider CPC 464 and 6128. Is it still possible to obtain an M4 board? Even a used one, or as a DIY kit?
Kind Regards,
Martin
Hello Duke,
I would like to purchase a M4 board for a CPC6128. Can you please let me know the cost including shipping to France.
Many thanks and great work!
hello 🙂
I would like to order a M4 board for my amstrad cpc 6128.
Are those still available ?
Thank you 🙂
Philippe.
Hi Duke,
I would like to purchase one M4 card.
Thanks.
Laurent
Hi Duke,
I’m interested in buying an M4 board for my CPC 464. How to proceed ?
Many thanks.
Regards,
Laurent
Hello Duke,
thanks for your great contribution in the retro computer scene.
I‘m very much interested in purchasing a M4 Board for my Amstrad CPC 6128 Plus.
How much is it including shipping to Germany.
Many thanks and best regards,
Holger
Buenas noches Duke.
Como puedo hacerme con una M4. Gracias un saludo.
Hola Duke.
De la misma forma que el resto de tus admiradores, yo también estaría interesado en ver cómo comprar una de esas M4Board para mi Amstrad CPC6128. A la vez.. estoy valorando tambien el Imperium SOLO.
Contacta conmigo por favor, o si otra persona sabe cómo adquirir una de esas placas.
Muchas gracias.
Hi Duke!
I’d like to purchase an M4 board to use on a 6128 and two 464’s I’m restoring. I can’t find anywhere to purchase them from though. Please can you tell me where I’d be able to get one from?
Also, do they have any diagnostic facilities in them?
Thanks for your amazing work!
hi Duke…
i need to contact you about a M4 board that is no longer reading SDCards… (ive tryed multiple)..
could you email me back please…im having withdrawals! 😛
thanks
hi Duke 🙂
I would like to order a M4 board for my amstrad cpc 6128 plus.
Thank you 🙂
David
Is it still possible to buy these?
Hi Duke,
Are these still made and available to purchase?
Kind Regards
Hi Duke, I would like to buy M4 board for Amstrad CPC6128.
It woulbe new life for my cpc.
Hi Duke,
I would like to order a me board for amstrad cpc6128.
Kind Regards
Jonny Justvik
Hi Duke,
I would like to order a me board for amstrad cpc464.
Kind Regards
Tutti
Hi Duke, this looks amazing!! Thanks so much!!
I would like to order one for my Amstrad CPC 464. Could you please add me to the waiting list. Much appreaciated!
Kind Regards,
Peshmode
Hi Duke, I would like to buy an M4 board for CPC6128 and are they still available for purchase? I will be grateful for answer.
Kind Regards,
PJ
Hi Duke,
I would like to order one for my CPC6128 plus if possible, could you please tell me how?
Regards.
Hello Duke,
I would like to buy your M4 Board for my CPC 6128. How can I do that?
Best regards.
Fabian
Hola Duke
Estoy interesado en un m4 board para mi cpc6128.
Como podría pedirlo gracias
Dear Duke, I’d like mine too 🙂
How should we proceed ?
Thank you !
Hello Duke,
I would like to to buy the m4board for my 6128 please, can you contact me ?
Thank you very much, great job.
Hello Duke,
I’m interested in buying an M4 board for my 6128 but I don’t know if you are selling it anymore, and how much it costs.
Hi
How to buy one please ?
Laurent
Hi duke, I would like to buy a M4 board. Could you tel me how to do?
Thanks