40027 Keyboard Controller For The CPW 8512 - 9512

[Audronic]

Hi All
40027 Keyboard Controller For The CPW 8512 - 9512.
Has anybody reverse engineered this chip
As they are Very costly over here (Australia)
I have a Faulty on in my keyboard
Or:-
If anybody has a spare I would like to Purchase one

Thanks

Keep Safe

Ray

[robcfg]

I took a look at the service manual here https://habisoft.com/pcwwiki/lib/exe/fetch.php?media=manuales:servicio:manual_servicio_tecnico_pcw_8256.pdf and it appears as UPD8048HC, which means that is an Intel microcontroller, fairly common (https://en.wikipedia.org/wiki/Intel_MCS-48).

Now, I don't know if it's been dumped or how easy is to find and program one or if there's a modern replacement.

[dragon]

Hi All
40027 Keyboard Controller For The CPW 8512 - 9512.
Has anybody reverse engineered this chip
As they are Very costly over here (Australia)
I have a Faulty on in my keyboard
Or:-
If anybody has a spare I would like to Purchase one

Thanks

Keep Safe

Ray

Here:

https://icompplus.com/es/circuitos-integrados/amstrad/40027

[Audronic]

Hi All
40027 Keyboard Controller For The CPW 8512 - 9512.
Has anybody reverse engineered this chip
As they are Very costly over here (Australia)
I have a Faulty on in my keyboard
Or:-
If anybody has a spare I would like to Purchase one

Thanks

Keep Safe

Ray

Here:

https://icompplus.com/es/circuitos-integrados/amstrad/40027

Hi Dragon

Ok Thanks BUT

The postage to Australia is 35 Euro Plus the cost of the chip ? I cannot afford that
Thanks anyway
I will keep looking

Keep Safe

Ray

[dragon]

From service manual don't appear do much thing.

It appears recieve the status of the keyboard Matrix divided in column access+row access. A parallel data

It just transform It to some type of serial data and send It  to the PCW.

The rom was hardcoded in factory It can't be dumped, but the ic comunication can be easy observéd from outside.

[robcfg]

There are some projects out there to read the roms out of MCS-48 family of microcontrollers and in a worst case scenario we can send one for decapping and get the rom from the pictures.

[Audronic]

I took a look at the service manual here https://habisoft.com/pcwwiki/lib/exe/fetch.php?media=manuales:servicio:manual_servicio_tecnico_pcw_8256.pdf and it appears as UPD8048HC, which means that is an Intel microcontroller, fairly common (https://en.wikipedia.org/wiki/Intel_MCS-48).

Now, I don't know if it's been dumped or how easy is to find and program one or if there's a modern replacement.

Hi robcfg

Thanks for the links

Good information.

Keep Safe

Ray

[Audronic]

From service manual don't appear do much thing.

It appears recieve the status of the keyboard Matrix divided in column access+row access. A parallel data

It just transform It to some type of serial data and send It  to the PCW.

The rom was hardcoded in factory It can't be dumped, but the ic comunication can be easy observéd from outside.

Hi Dragon

Thanks

I will keep looking for 40027 IC

Thanks

Keep Safe

Ray

[Audronic]

There are some projects out there to read the roms out of MCS-48 family of microcontrollers and in a worst case scenario we can send one for decapping and get the rom from the pictures.

Hi robcfg

I dont think its worth doing just for 1 Faulty keyboard

Thank
Keep
Safe

Ray

[dragon]

Hi All
40027 Keyboard Controller For The CPW 8512 - 9512.
Has anybody reverse engineered this chip
As they are Very costly over here (Australia)
I have a Faulty on in my keyboard
Or:-
If anybody has a spare I would like to Purchase one

Thanks

Keep Safe

Ray

Here:

https://icompplus.com/es/circuitos-integrados/amstrad/40027

Hi Dragon

Ok Thanks BUT

The postage to Australia is 35 Euro Plus the cost of the chip ? I cannot afford that
Thanks anyway
I will keep looking

Keep Safe

Ray

Well, i can buy It and send It to you reducing costs a litte.

Probably around 16,50e of shipment(or less).

(7,50 sending It to my house+9e Max resending  It to Australia). (That depend of the weight of the chip).+ Cost of ic apart.

Sending as certificate letter correos have these tarife.

20g 6,55e
20-50g 7,40e
50-100 9e
100-500g 15,35e

Can be reduced around 50%  more  sending It as letter without certificate, but i don't recomend It, because he don't have track number to claim if he lost. So if he  lost between Spain-australia is lost forever. And money lost.

So maybe you can take It for around 22e +- that is nearly 50% less.

Apart of that i don't know the tax from australy side.

In the other hand appears that  the keyboard rom was dumped for mess:

https://mdk.cab/download/rom/pcw8256

I have read in the datasheet that the ic can load a program from a external  rom source instead of their internal rom.

[Audronic]

Hi All
40027 Keyboard Controller For The CPW 8512 - 9512.
Has anybody reverse engineered this chip
As they are Very costly over here (Australia)
I have a Faulty on in my keyboard
Or:-
If anybody has a spare I would like to Purchase one

Thanks

Keep Safe

Ray

Here:

https://icompplus.com/es/circuitos-integrados/amstrad/40027

Hi Dragon

Ok Thanks BUT

The postage to Australia is 35 Euro Plus the cost of the chip ? I cannot afford that
Thanks anyway
I will keep looking

Keep Safe

Ray

Well, i can buy It and send It to you reducing costs a litte.

Probably around 16,50e of shipment(or less).

(7,50 sending It to my house+9e Max resending  It to Australia). (That depend of the weight of the chip).+ Cost of ic apart.

Sending as certificate letter correos have these tarife.

20g 6,55e
20-50g 7,40e
50-100 9e
100-500g 15,35e

Can be reduced around 50%  more  sending It as letter without certificate, but i don't recomend It, because he don't have track number to claim if he lost. So if he  lost between Spain-australia is lost forever. And money lost.

So maybe you can take It for around 22e +- that is nearly 50% less.

Apart of that i don't know the tax from australy side.

In the other hand appears that  the keyboard rom was dumped for mess:

https://mdk.cab/download/rom/pcw8256

I have read in the datasheet that the ic can load a program from a external  rom source instead of their internal rom.

Hi Dragon

Thanks for all that information
Thanks for looking into the costs
The costs are still to expensive, so i will thank you and not go ahead with the Purchase.

I will have a look at the data sheet and see what has to be done.

Keep Safe

Ray