Search found 1978 matches

by mrtinb
Tue Sep 24, 2024 12:23 pm
Forum: Lambda 8300/ Power 3000 Lounge
Topic: New 8300 and Colour Box owner :D
Replies: 11
Views: 4248

Re: New 8300 and Colour Box owner :D

I think it was your post about voltage boosting that I saw, but that's only usually necessary if the circuit is pulling more current than the PSU can provide. In my case my bench PSU sits at 400mA with the pack fitted. It's current limited to 1A so if the machine did need more current it would be o...
by mrtinb
Mon Sep 23, 2024 10:28 pm
Forum: Lambda 8300/ Power 3000 Lounge
Topic: New 8300 and Colour Box owner :D
Replies: 11
Views: 4248

Re: New 8300 and Colour Box owner :D

I do remember having to put more power into the Lambda 8300, when I attached a Colour Pack.

My color monitor since has died, and my Lambda 8300 has become flaky, so I won't be able to test it now.
by mrtinb
Thu Sep 19, 2024 1:07 pm
Forum: Lambda 8300/ Power 3000 Lounge
Topic: SOS - Reviving a Power 3000 tape
Replies: 33
Views: 59926

Re: SOS - Reviving a Power 3000 tape

Tried it with three ROMS ... Reportedly works with the orginal V1 (LAM10061.BIN) ROM, however my EightyOne v1.40 doesn't work with this ROM (no programs will load or save although I can type in and run programs). With the Updated ROM, the game crashes with 16K, and runs with 2K but with visual dist...
by mrtinb
Mon Sep 16, 2024 3:27 pm
Forum: Hardware
Topic: Zx81plus38 rev1.10 video issues
Replies: 34
Views: 9813

Re: Zx81plus38 rev1.10 video issues

If I put an oscilloscope on that pin I should see a typical 5v to 0v squared movement coming from either the maxduino or a properly volume controlled analog tape output in order to get a reasonable chance of a program to be loaded. When I have used the TZXduino with a regurlar ZX81, I have voltages...
by mrtinb
Tue Sep 10, 2024 6:14 am
Forum: Software
Topic: [Lambda Type-Ins]: Mastermind by O. Steen Hansen
Replies: 1
Views: 1317

Re: [Lambda Type-Ins]: Mastermind by O. Steen Hansen

I didn't know there existed dedicated type in magazines in Denmark. Thank you for sharing. I'll study the old magazines. :-)
by mrtinb
Thu Sep 05, 2024 4:41 pm
Forum: Hardware
Topic: ZX81 1983 Issue 3 Board, which has two initial problems.
Replies: 10
Views: 3202

Re: ZX81 1983 Issue 3 Board, which has two initial problems.

1st Problem The keys 1,0,Q,P,A, Enter, Shift and Space fail to be recognised. I have checked for continuity from the various solder pads on the mainboard to the keyboard connectors on the ZX81 and they all seem ok. You can try to disconnect the keyboard, and short one of the solder pads from the 5-...
by mrtinb
Thu Aug 29, 2024 10:49 am
Forum: Software
Topic: Game SQUEZEE PLAY a machine code analysis
Replies: 1
Views: 3162

Re: Game SQUEZEE PLAY a machine code analysis

Great work.

The program was made by Danish company Scan-Bit Software and was sold in the largest toystore BR-Legetøj (B.R.'s play toys) where they also sold the Lambda 8300.
by mrtinb
Wed Aug 21, 2024 12:01 pm
Forum: Hardware
Topic: Need help reverse engineering Timex Store Demonstrator ROM file
Replies: 93
Views: 36780

Re: Need help reverse engineering Timex Store Demonstrator ROM file

I am logged into my YouTube account, but I am still told the video is private. So I assume you have only given access to yourself.
by mrtinb
Fri Aug 16, 2024 7:34 pm
Forum: WANTED
Topic: zx81 ula anyone ??
Replies: 5
Views: 4631

Re: zx81 ula anyone ??

On this post, they say you should use Etsy when located in EU. https://sinclairzxworld.com/viewtopic.php?t=4407 Etsy states on their homepage, that if the seller buys the shipping label from Etsy, then the IOSS electronic registration is sent by Etsy, thus the receiver (you) will not receive an extr...
by mrtinb
Fri Aug 16, 2024 12:34 pm
Forum: WANTED
Topic: zx81 ula anyone ??
Replies: 5
Views: 4631

Re: zx81 ula anyone ??

I belive most use the vLA81 ULA replacement today, as they are available.