Lambda 8300 ULA

Post Reply
User avatar
mrtinb
Posts: 2004
Joined: Fri Nov 06, 2015 5:44 pm
Location: Denmark
Contact:
Contact mrtinb

Lambda 8300 ULA

Post by mrtinb »

As the Lambda 8300 is a clone of the ZX81 it must have a chip like the ULA.

Does the Lambda 8300 use the same ULA as the ZX81 or is it different?

If it is different I assume it will be very hard to find.

Martin
Last edited by mrtinb on Tue Mar 01, 2016 9:56 pm, edited 1 time in total.
Martin
https://zx.rtin.be
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube
Top
nollkolltroll
Posts: 351
Joined: Sat Sep 27, 2014 8:02 pm
Location: Stockholm, Sweden

Re: Lambda 8300 ULA

Post by nollkolltroll »

Yes, the Lambda has a different ULA. I'd say it is only possible to find replacements from other spare machines.
/Adam
Top
User avatar
mrtinb
Posts: 2004
Joined: Fri Nov 06, 2015 5:44 pm
Location: Denmark
Contact:
Contact mrtinb

Re: Lambda 8300 ULA

Post by mrtinb »

nollkolltroll wrote:I'd say it is only possible to find replacements from other spare machines.
:cry:

Martin
Martin
https://zx.rtin.be
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube
Top
RWAP
Posts: 1349
Joined: Thu May 08, 2008 8:42 am
Location: Stoke-on-Trent, UK
Contact:
Contact RWAP

Re: Lambda 8300 ULA

Post by RWAP »

If someone has teh chip identifier, we could always start a search for these....
Top
User avatar
mrtinb
Posts: 2004
Joined: Fri Nov 06, 2015 5:44 pm
Location: Denmark
Contact:
Contact mrtinb

Re: Lambda 8300 ULA

Post by mrtinb »

IMG_0054.JPG
(1.56 MiB) Downloaded 710 times
  • NEC D780C is the Z80 CPU
  • MN2114-3 is the RAM
  • 2364CR01 is the ROM I assume
  • C4005 2283 must be the Lambda's ULA
Martin
Martin
https://zx.rtin.be
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube
Top
User avatar
1024MAK
Posts: 5527
Joined: Mon Sep 26, 2011 10:56 am
Location: Looking forward to summer in Somerset, UK...
Contact:
Contact 1024MAK

Re: Lambda 8300 ULA

Post by 1024MAK »

mrtinb wrote:2364CR01 is the ROM I assume
Yes, the 2364 part of the number indicates it's a ROM, 64k bit (8k byte).
mrtinb wrote:C4005 2283 must be the Lambda's ULA
The 2283 is likely the date of manufacture, week 22 of 1983. So the part number is C4005.

Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp

:!: Standby alert :!:
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb :!:
Spring approaching...
Top
RWAP
Posts: 1349
Joined: Thu May 08, 2008 8:42 am
Location: Stoke-on-Trent, UK
Contact:
Contact RWAP

Re: Lambda 8300 ULA

Post by RWAP »

That ULA is not going to be easy to find - could the other Lambda owners check to see if they have a different ULA (maybe a manufacturer name!)

Wonder if the ZX81 ULA would work?
Top
User avatar
mrtinb
Posts: 2004
Joined: Fri Nov 06, 2015 5:44 pm
Location: Denmark
Contact:
Contact mrtinb

Re: Lambda 8300 ULA

Post by mrtinb »

RWAP wrote:could the other Lambda owners check to see if they have a different ULA (maybe a manufacturer name!)
Looks like the manufacturer's name is RCL.

Martin
Martin
https://zx.rtin.be
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube
Top
User avatar
mrtinb
Posts: 2004
Joined: Fri Nov 06, 2015 5:44 pm
Location: Denmark
Contact:
Contact mrtinb

Re: Lambda 8300 ULA

Post by mrtinb »

mrtinb wrote:Looks like the manufacturer's name is RCL.
And the logo on the IC looks like the logo on this homepage: http://www.rcl.com.hk/
Martin
https://zx.rtin.be
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube
Top
RWAP
Posts: 1349
Joined: Thu May 08, 2008 8:42 am
Location: Stoke-on-Trent, UK
Contact:
Contact RWAP

Re: Lambda 8300 ULA

Post by RWAP »

mrtinb wrote:
mrtinb wrote:Looks like the manufacturer's name is RCL.
And the logo on the IC looks like the logo on this homepage: http://www.rcl.com.hk/
Great - that should help

Are you sure it's the ULA at fault?
Top
Post Reply

Return to “Hardware”