CPC Mainboard Versions

[robcfg]

The MC0002C board is really interesting because I thought it was exclusive for the 472 and yours is a standard 464.


I'll include it in the Mainboard versions article.


Thanks!


Edit:I uploaded the 3 pictures to the article, nice pictures, btw!

[dragon]

I add a lite data,not exactly the motherboard,but,with entire cpc.

Probably,the cpcs that are made in corea,are made  in Gyeongsankbuk-do factory(orion factory the monitors at least 100% Insurance).

[Gryzor]

You think they might have some stock left?

[dragon]

You think they might have some stock left?

.

No,beacause, in 2002,They create a subdivision dedicate to lcd,plasma etc.. panels and moved a little.


http://www.oriondisplay.net/ (here you can see the actual factory).

The esact direction in fabricacion cpcs in corea was:

165, KONGDAN-DONG, KUMI-SHI, KYONGBUK (the actual factory is same direction but 257-6 number).

But,you can ask for cpc cost-down made in tailand.The factory exists:


This:





236 Moo 2 Nongchark Banbung, Chonburi 20170 THAILAND (home of cpc cost-down .

All amstrad computers,cpc,pc,pcw printers that are made in corea o thailand,are produced by orion in their  factories. The printers made in hong kong,Are made in amstrad factory.

[Gryzor]

I'll keep that in mind on my next trip to Thai

[arnoldemu]

for fdc, 8255 and Z80 I have added the part numbers used. I looked at the existing pictures on the wiki.
There *may* be some minor differences between them or there may be none.

It seems there is a difference between NMOS and CMOS Z80 in the undocumented OUT (C),0 instruction. On NMOS it actually does OUT (C),&ff.

[SyX]

It seems there is a difference between NMOS and CMOS Z80 in the undocumented OUT (C),0 instruction. On NMOS it actually does OUT (C),&ff.

Yes, i read that in an old doc, but i thought that there is not any CPC using a NMOS Z80. Is this supposition correct?

[dragon]

I add a little unkow information related to pcw series.The amstrad pcw rangue uses a nec gate array,probably a nec version cmos-2 or cmos 3 or cmos-4 series.


Disafortunly.In the world wide web.I only can found the datasheet of cmos-2.


But,its useful,because it explan how read the serial of chip.Thats  feauture is equal in all series of nec gate array.


So in the motherboard of pcw in cpc wiki picture.The number in the asic chips=lote of production.


http://pdf1.alldatasheet.com/datasheet-pdf/view/115557/NEC/UPD65000.html


http://www2.renesas.com/maps_download/pdf/A19156EJ1V0IF00.pdf (view table 2.1)

[Bryce]

Yes, i read that in an old doc, but i thought that there is not any CPC using a NMOS Z80. Is this supposition correct?

The original NMOS Z80s were in the typical white casing and they also only went up to 2.5Mhz. The CPC only ever used the CMOS Z80A, which went up to 4Mhz. An NMOS Z80 wouldn't work in a CPC.

Bryce.

[SyX]

Thanks Bryce, i use a lot the "OUT (C),0", it's recorded in my mind, because it's very useful for rasters, sound and keyboard routines, and i would hate to use an alternative (SLOW) way

PD:Now, could we attach this z80 to the CPC???

[68k-dude]

PD:Now, could we attach this z80 to the CPC???

I have a good two part epoxy that we could use.  The little blighter wouldn't ever get away.

[TFM]

I doubt the glass Z80 contains all the undocumented or even illegal instructions though

[SyX]

In that case, we will need to request at Sharp samples for testing

[TFM]

Of course ;-)

[Bryce]

I don't think I'd want a glass Z80 on my CPC, I'd feel my CPC was using Windows

Bryce. 

[MacDeath]

There, have a glass of Z80... a good millésime IMO.

[xesrjb]

Is here someone who owns the CPC 464 prototype?
http://cpcwiki.eu/imgs/3/3d/GA_high_res.JPG

Jesus in spain has one!!

xesrjb

[TFM]

I don't think I'd want a glass Z80 on my CPC, I'd feel my CPC was using Windows

Bryce.

Haha, indeed, but the CPC would be faster though 

There, have a glass of Z80... a good millésime IMO.

Right, I heart you get the most tasty in France 

[dragon]

About my motherboard : http://cpcwiki.eu/index.php/File:AmstradCPC464_Z70375_MC0044D_GA40010_PCB_Bottom.jpg


Anyone know the use of the red Wire in the two chips of ram?.

[Bryce]

Yes, it's Adress line 3 (A3). Either the board was damaged and needed to be repaired or there was a mistake made in the layout and needed to be reworked.

Bryce.

Edit: I just took a look at the top of the board and realised that someone has done major IC replacement on it, so I assume they tore a track while doing so. ie: It's a damaged track, not a layout error.

[dragon]

Years ago the motherboard is broken(overvoltage)The mother board is repaired by the official amstrad repair service.I remember the phone call("we found the piece broken 60e equivalent to repair ir").I'm beginning to think that they were useless.After the repair,the cpc never charge the games well.I had to return a lot of games in their day to stores.Because it not load.


Who can imagine. They can destroy a layout in the motherboard to repair them lol.


I not see the bacwards of the motherboard,until it has been scanned.

[Bryce]

Well €60 for that repair isn't bad, they replaced all the RAM, the CRTC, the Gate array and the ROM (The CPU may have been replaced too). So the price is actually quite good considering the time they would need to do this. Removing ICs isn't easy, so tearing a track can easily happen if you lift the IC too soon or heat the pin a bit too much.
The loading problems are unlikely to be related to the over-voltage or repair. Most likely just a badly adjusted or dirty tape head.

Strange that they used MME2164 RAM instead of the original KM4164. It's an exact equivalent, but I would have thought that 4164 would have been easier to source.

Bryce.

[dragon]

I not sure,maybe is the range year 90-94 when it is  repaired.I search the datasheet of ram,but not lucky.Maybe they use the only ram they can found.

[Bryce]

The 2164 is identical to the 4164, same pinout, timings etc. So you can use the 4164 Datasheet for reference.

The 2164 was the Eastern Block (GDR, USSR) version of the 4164 and datasheets for these are pretty difficult (if not impossible) to find. Even back in the 90's it's unusual for a western repair shop to be using eastern components.

Bryce.

[ralferoo]

The 2164 was the Eastern Block (GDR, USSR) version of the 4164 and datasheets for these are pretty difficult (if not impossible) to find. Even back in the 90's it's unusual for a western repair shop to be using eastern components.

Proof that Bryce really does know everything...