Lambda 8300 ULA

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mrtinb
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Lambda 8300 ULA

Post by mrtinb » Tue Mar 01, 2016 4:31 pm

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 8:56 pm, edited 1 time in total.
Martin
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Re: Lambda 8300 ULA

Post by nollkolltroll » Tue Mar 01, 2016 8:08 pm

Yes, the Lambda has a different ULA. I'd say it is only possible to find replacements from other spare machines.
/Adam

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Re: Lambda 8300 ULA

Post by mrtinb » Tue Mar 01, 2016 8:56 pm

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

Martin
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Re: Lambda 8300 ULA

Post by RWAP » Wed Mar 02, 2016 6:40 am

If someone has teh chip identifier, we could always start a search for these....

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Re: Lambda 8300 ULA

Post by mrtinb » Wed Mar 02, 2016 9:21 pm

IMG_0054.JPG
IMG_0054.JPG (1.56 MiB) Viewed 492 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
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Re: Lambda 8300 ULA

Post by 1024MAK » Thu Mar 03, 2016 12:28 am

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

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Re: Lambda 8300 ULA

Post by RWAP » Thu Mar 03, 2016 3:00 pm

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?

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Re: Lambda 8300 ULA

Post by mrtinb » Thu Mar 03, 2016 3:13 pm

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.

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Re: Lambda 8300 ULA

Post by mrtinb » Thu Mar 03, 2016 3:16 pm

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/
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Re: Lambda 8300 ULA

Post by RWAP » Thu Mar 03, 2016 4:41 pm

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?

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