Search found 716 matches

by marcusjambler
Tue Jan 28, 2020 9:34 am
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 840
Views: 49137

Re: RGB to HDMI using a Pi Zero and a small CPLD

Sure I ordered extra in case other people wanted one too.
I'll take one board please.
by marcusjambler
Mon Jan 27, 2020 4:34 pm
Forum: other vintage computer hardware, software and games
Topic: Spectrum power supplies
Replies: 11
Views: 150

Re: Spectrum power supplies

Photos showing buck converter and simple transistor composite mod
IMG_1292a.jpg
IMG_1291a.jpg
IMG_1289a.jpg
Marcus
by marcusjambler
Mon Jan 27, 2020 10:25 am
Forum: other vintage computer hardware, software and games
Topic: Spectrum power supplies
Replies: 11
Views: 150

Re: Spectrum power supplies

I'll post some photos of an updated mobo when I get home

Marcus
by marcusjambler
Mon Jan 27, 2020 10:04 am
Forum: other vintage computer hardware, software and games
Topic: Spectrum power supplies
Replies: 11
Views: 150

Re: Spectrum power supplies

13v unloaded is normal. The heat is normal too... I swap the 7805 regs for 5v buck converters ( no heatsink required ) https://www.ebay.co.uk/itm/5x-Voltage-Regulator-5-24V-to-5V-3A-Step-Down-Buck-Converter-Power-Module-TE818/392212064469?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 Ma...
by marcusjambler
Wed Jan 22, 2020 10:45 pm
Forum: general
Topic: Today I received.....
Replies: 5613
Views: 468031

Re: Today I received.....

nice toys =D> =D> =D>

I'm on it remklep... not much longer :D
by marcusjambler
Wed Jan 22, 2020 6:15 pm
Forum: general
Topic: Today I received.....
Replies: 5613
Views: 468031

Re: Today I received.....

I just got another master :D
With it came a pile of books, a Smart Cart, several disks and some education docs.
I'm wondering if they are of any interest to the archive?
IMG_1286a.jpg
by marcusjambler
Wed Jan 22, 2020 6:12 pm
Forum: archive submissions
Topic: Smart Cartridge - Care Electronics
Replies: 4
Views: 499

Re: Smart Cartridge - Care Electronics

Thanks Nigel
by marcusjambler
Wed Jan 22, 2020 5:50 pm
Forum: archive submissions
Topic: Smart Cartridge - Care Electronics
Replies: 4
Views: 499

Re: Smart Cartridge - Care Electronics

I've just got one of these cartridges with some books.
Is there any documentation for it in the archive?

Marcus
by marcusjambler
Tue Jan 14, 2020 9:04 pm
Forum: wanted
Topic: Master 128 / Turbo
Replies: 6
Views: 345

Re: Master 128 / Turbo

I'll Pm with some details
by marcusjambler
Tue Jan 14, 2020 8:41 pm
Forum: wanted
Topic: Master 128 / Turbo
Replies: 6
Views: 345

Re: Master 128 / Turbo

Hi Danny

Yes... possibly... depending on what drive you would want.
I'm guessing 40/80T DD DS?

Marcus
by marcusjambler
Tue Jan 14, 2020 5:45 pm
Forum: wanted
Topic: Master 128 / Turbo
Replies: 6
Views: 345

Re: Master 128 / Turbo

I have a spare master. I'll dig it out if your interested.
Its vanilla with the PSU re-capped by me... I can include a CMOS battery pack.
Keyboard fully functional and the whole computer has been stripped and cleaned.
There may be some of the usual discolouration

Marcus
by marcusjambler
Fri Jan 10, 2020 9:59 am
Forum: hardware
Topic: New Raspberry Pi to 1MHz bus interface
Replies: 62
Views: 1885

Re: New Raspberry Pi to 1MHz bus interface

I'm interested in one please Ken :)
by marcusjambler
Sat Jan 04, 2020 1:00 pm
Forum: hardware
Topic: 64K to 128K upgrade
Replies: 49
Views: 4828

Re: 64K to 128K upgrade

I have a B+ that does this
I found that if I move the ROMS ( not OS ) around it changes the reported RAM :shock:
by marcusjambler
Sat Jan 04, 2020 12:11 pm
Forum: acorn atom and system
Topic: Atom Tube Interface
Replies: 227
Views: 20537

Re: Atom Tube Interface

Bingo... Cheers fellas... Link 2 the culprit... =D>
IMG_1187a.jpg
by marcusjambler
Fri Jan 03, 2020 11:48 pm
Forum: acorn atom and system
Topic: Atom Tube Interface
Replies: 227
Views: 20537

Re: Atom Tube Interface

I've moved the clock select north and it still hangs.
Pressing escape shows it is stalled at line 40 as suggested.
by marcusjambler
Fri Jan 03, 2020 11:13 pm
Forum: acorn atom and system
Topic: Atom Tube Interface
Replies: 227
Views: 20537

Re: Atom Tube Interface

The tube Gal image from further up this post I think...
See attached.
AtomTube.zip
(928 Bytes) Downloaded 3 times
I ran the tube software in tube folder the latest beta with the AGD games on.

I'll move the clock select jumper and try again.
by marcusjambler
Fri Jan 03, 2020 1:27 pm
Forum: acorn atom and system
Topic: Atom Tube Interface
Replies: 227
Views: 20537

Re: Atom Tube Interface

I've made good progress with adding the tube interface and a matchbox copro ( thanks ROBC ) to this issue 4 Atom. I just need a bit of help working out why its hanging when I try to run ClockSP [-o< Pictures of the set-up : IMG_1181a.jpg IMG_1182a.jpg IMG_1183a.jpg IMG_1184a.jpg IMG_1185a.jpg
by marcusjambler
Thu Jan 02, 2020 12:11 am
Forum: hardware
Topic: Need help repairing dual Cumana drives...
Replies: 8
Views: 234

Re: Need help repairing dual Cumana drives...

Are you hearing anything from the drive at all?
Sounds like there's no 12v supply
by marcusjambler
Mon Dec 30, 2019 9:20 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 78
Views: 3128

Re: Yarrb - redesigned

My YARRB 2 arrived today.

Just need to dig out my other ATOM now :D
by marcusjambler
Mon Dec 30, 2019 9:18 pm
Forum: acorn atom and system
Topic: YARRB [SOLD OUT]
Replies: 275
Views: 18784

Re: YARRB [SOLD OUT]

Hi Roland The YARRB is now working great in this Issue 4 ATOM. IMG_1143a.jpg IMG_1145a.jpg IMG_1147a.jpg IMG_1161a.jpg There are some artifacts appearing on the screen ( I'll make a post in the correct thread for the noise killer ) Also I have made good progress with adding a matchbox copro But it i...
by marcusjambler
Sat Dec 21, 2019 9:51 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 78
Views: 3128

Re: Yarrb - redesigned

If the AtoMMC is correctly attached then the Atom should not hang in any configuration. I noticed that my Atom did work with JP4 (first Yarrb version) to either position but AtoMMC was not working with the jumper in position 1-2 but it was in position 2-3 (i.e. left). Can you check that? Also clean...
by marcusjambler
Sat Dec 21, 2019 9:42 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 78
Views: 3128

Re: Yarrb - redesigned

Thanks Roland =D> Thats a big help.
I think I need to re-program my other YARRB board that hangs when I attach the ATOMMC SD card

Marcus
by marcusjambler
Sun Dec 01, 2019 1:42 pm
Forum: general
Topic: Today I received.....
Replies: 5613
Views: 468031

Re: Today I received.....

The board issue is not the factor here, the factor is which ULA version is fitted. There are three ULA versions. The first two versions did not generate the part of the video signal known as the “back porch” because monochrome (black and white) TVs did not need it. Sinclair then introduced an impro...
by marcusjambler
Sun Dec 01, 2019 12:57 am
Forum: general
Topic: Today I received.....
Replies: 5613
Views: 468031

Re: Today I received.....

do the composite video mod at some point
simple mod only works with issue 3.... back porch required

Marcus
by marcusjambler
Sat Nov 30, 2019 11:11 pm
Forum: other vintage computer hardware, software and games
Topic: Another broken computer: Epson HX-20
Replies: 11
Views: 736

Re: Another broken computer: Epson HX-20

I tried connecting a 2A 5v PSU to the battery connector but it didn't work.
Curious.. I normally power my HX20s with a beeb psu (5vdc) straight to the mobo battery connector no worries.
Are you connecting to the external connector or the motherboard?
Same as Col I think...
by marcusjambler
Sat Nov 30, 2019 11:01 pm
Forum: for sale / freebies
Topic: For sale - A2 Posters: Elite, Zarch, Ravenskull, Codename Droid, Crazee Rider, Palace of Magic, Repton
Replies: 40
Views: 2124

Re: A2 Posters: Elite, Zarch, Ravenskull, Codename Droid, Crazee Rider, Palace of Magic, Repton

still waiting for the first person to accept the challenge of sharing a photo of the poster(s) proudly on display, hint hint! ;)
Vying for wall real-estate could get micro political :D
by marcusjambler
Wed Nov 27, 2019 1:32 pm
Forum: off-topic
Topic: Done scratching that itch
Replies: 10
Views: 467

Re: Done scratching that itch

Great job Andy... =D>

I keep drooling over that board myself #-o
by marcusjambler
Tue Nov 26, 2019 2:14 pm
Forum: acorn atom and system
Topic: Replica Atom
Replies: 65
Views: 3138

Re: Replica Atom

Looking great :D

Registering interest in a board... dependant on price being reasonable

Marcus