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Robert Morrison

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Fitting ZX-HD with a new Raspberry Pi Zero. It’s a socket connection which means that normally there’s no need for soldering, but this...

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Fitting ZX-HD with a new Raspberry Pi Zero. It’s a socket connection which means that normally there’s no need for soldering, but this Pi Zero had no header pins so they needed to be fitted first.

Partially reassembled ZX-HD interface with back removed showing a Raspberry Pi Zero inside. Also pictured: soldering iron and various soldering gubbins.

8.3.2025 16:15Fitting ZX-HD with a new Raspberry Pi Zero. It’s a socket connection which means that normally there’s no need for soldering, but this...
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Are any ae yous intae Spreadsheets? They’re sick, man. #productivity #hustle #workSmarterNotHarder

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Are any ae yous intae Spreadsheets? They’re sick, man. #productivity #hustle #workSmarterNotHarder

Photograph of the clamshell case, manual and 3" disk for Tasman Software’s “TASCALC” which is a spreadsheet application for ZX Spectrum. The styling is familiar among the Tasword family of software. The disk label for TASCALC is metallic gold/bronze colour.

27.2.2025 17:22Are any ae yous intae Spreadsheets? They’re sick, man. #productivity #hustle #workSmarterNotHarder
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Mmmm-rrrrrr Crrrrrrrzmrrrrrrzz, rrrrvrrrrr-rrrrrnn!

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Mmmm-rrrrrr Crrrrrrrzmrrrrrrzz, rrrrvrrrrr-rrrrrnn!

ZX Spectrum loading screen featuring a festive zombie

11.12.2024 08:58Mmmm-rrrrrr Crrrrrrrzmrrrrrrzz, rrrrvrrrrr-rrrrrnn!
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I’m about a week late but I’ve found something “healthier” and all together more fun than chocolates. #advent #zxspectrum

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I’m about a week late but I’ve found something “healthier” and all together more fun than chocolates. #advent #zxspectrum

A wall-hanging advent calendar composed of several numbered canvas pockets that happen to be about the size of a standard boxed cassette tape. I’ve refilled the pockets with a selection of ZX Spectrum games including Moley Christmas, Mrs Mopp, Seymour goes to Hollywood, Codename Mat and Shinobi.

7.12.2024 14:38I’m about a week late but I’ve found something “healthier” and all together more fun than chocolates. #advent #zxspectrum
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Gotta toast fast #zxspectrum

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Gotta toast fast #zxspectrum

Disassembled ZX Spectrum+ 128. The iconic finned radiator heatsink has been detached, as has the voltage regulator. Also pictured is a syringe of thermal compound normally used on PC CPUs or GPUs or whatever.

15.11.2024 21:53Gotta toast fast #zxspectrum
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Day #2 in Cambridge In the city centre on the Sinclair and Acorn trail.

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Day #2 in Cambridge In the city centre on the Sinclair and Acorn trail.

The Corpus Clock. An enormous gold chronograph. It’s eh, quite striking. Horologically speaking.The former offices of Uncle Sir Clive at 6 Kings ParadeThe gleaming and modern official Rasperry Pi shop. I don’t really need another Raspberry Pi so I just came away with a branded mug and tote as a keepsake.The highly-recommended Jack’s Gelato was great and understandably busy.

10.11.2024 16:31Day #2 in Cambridge In the city centre on the Sinclair and Acorn trail.
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Retro Computer Festival 2024 Centre for Computing History in Cambridge I had a lovely time and spoke with many lovely people! A very...

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Retro Computer Festival 2024 Centre for Computing History in Cambridge I had a lovely time and spoke with many lovely people! A very welcoming bunch of retro folks, with so many interesting stories to share. Thanks to the CCH for a great event!

Main exhibition space at the Centre for Computing History. The room is filled with tables laden with vintage computing equipment.ZX Spectrum prototype mainboard and keyboard on display at the museum. Several computing devices showing key-based entry systems from simple keypads and membrane keyboards to full travel keys.A display of Heathkit computers magazines and catalogs from the late 70s. The machines are operating, with their numerical displays glowing.

10.11.2024 15:05Retro Computer Festival 2024 Centre for Computing History in Cambridge I had a lovely time and spoke with many lovely people! A very...
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Fun with MIDI!

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Fun with MIDI!

Short clip showing a RaspberryPi with a MIDI hat connected. The blueish white RX indicator is blinking furiously. (It’s playing GRABBAG.MID but you can’t hear it because this is a GIF).

29.8.2024 23:10Fun with MIDI!
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The Micro Enquirer (Spectrum)

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The Micro Enquirer (Spectrum)

The Micro Enquirer (Spectrum)&10;by Christopher Bidmead and Benjamin Woolley for Computer Answers, on a ZX Spectrum +3 with an external floppy drive cable attached, and a Kempston mouse interface nearby.

17.8.2024 19:12The Micro Enquirer (Spectrum)
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I am on my holidays.

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I am on my holidays.

Animated GIF. Image shows a wall mounted hotel room TV displaying the loading screen of Future Knight on ZX Spectrum (the computer is on the desk loading the game from cassette tape).

26.7.2024 20:04I am on my holidays.
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I’m working on my (second ever!) ROM hack this weekend and a random glitch has given me an idea…

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I’m working on my (second ever!) ROM hack this weekend and a random glitch has given me an idea…

A screenshot from Jetpac on the ZX Spectrum. The rocket ship graphics have corrupted and it has turned into an improbable tower of jumbled spaceship parts.Matchbox “Con-nect-ables” branded toy vehicles in a retail hang-card blister pack. The toys are segmented so you can recombine them in interesting ways such as adding wings to a car, and so on.

15.6.2024 11:30I’m working on my (second ever!) ROM hack this weekend and a random glitch has given me an idea…
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Work in progress! (This photo didn’t attach to the previous post for some reason). I’d had the thing open years ago to service the belt...

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Work in progress! (This photo didn’t attach to the previous post for some reason). I’d had the thing open years ago to service the belt or something but the old brittle wires gave way and it took some effort to deduce what goes where! It languished in the garage for ages; being raided for parts a couple of times, but I decided to give it another go last night. I couldn’t find a schematic for the whole unit, but the data sheet for the LA4160 amplifier IC was very helpful.

Photograph of a disassembled shoebox style cassette recorder. There is a cassette in the exposed mechanism and many wires all over the place. I’ve connected a logic probe for some reason. It’s playing Matchbox Twenty but you can’t hear it because this is a photograph.

6.6.2024 07:54Work in progress! (This photo didn’t attach to the previous post for some reason). I’d had the thing open years ago to service the belt...
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Fixed it! I had to improvise an output socket—I harvested the original one when I thought this player was beyond repair, but this was my...

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Fixed it! I had to improvise an output socket—I harvested the original one when I thought this player was beyond repair, but this was my childhood Spectrum cassette recorder so I made the effort to fix it. #HiFi #ZXSpectrum

Cassette recorder with an improvised earphone socket made from a small breadboard and some jumper wires. There’s a resistor for decoration but it’s not serving any electronic purpose. The breadboard has been optimistically labelled “HI-FI”.Overhead photo of the cassette recorder showing lots of patina from decades of wear and tear. It’s dusty, scratched and worn with a small faceplate around the tape counter missing. A red cassette tape can be seen through the deck window. The label reads: SKATE OR DIE; DOUBLE DECKER TAPES.A modified ZX Spectrum with a white key mat and a shiny RTS sticker (see RoseTintedSpectrum on YouTube dot com).

6.6.2024 07:44Fixed it! I had to improvise an output socket—I harvested the original one when I thought this player was beyond repair, but this was my...
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Midnight maths club Tonight we’re learning (or really just enjoying looking-at) bifurcation diagrams generated by Feigenbaum constants...

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Midnight maths club

Tonight we’re learning (or really just enjoying looking-at) bifurcation diagrams generated by Feigenbaum constants (…and very slowly plotted on a ZX Spectrum!)

Photograph of a CRT telly displaying a Feigenbaum constant bifurcation diagram generated by a ZX SpectrumPhotograph of a CRT telly showing a BASIC listing of the program that generated the diagram in the other picture. The program is by Ettrick Thomson.

4.6.2024 23:18Midnight maths club Tonight we’re learning (or really just enjoying looking-at) bifurcation diagrams generated by Feigenbaum constants...
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I had a great time at the Acorn Computers User Group meet-up last night in Falkirk. I was notionally representing SAM Coupé, but I spent...

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I had a great time at the Acorn Computers User Group meet-up last night in Falkirk. I was notionally representing SAM Coupé, but I spent almost the entire time learning about Elks, Masters, and RISC OS machines (and much more!) More pics at Spectrum Computing forum.

📷 Tosk / Retro Rendezvous

SAM Coupé computer with a few expansion cards plugged in, connected to an LCD television. On the screen is a blue and green horizon. Disks (and a spare SAM Drive) are scattered around.

29.3.2024 21:47I had a great time at the Acorn Computers User Group meet-up last night in Falkirk. I was notionally representing SAM Coupé, but I spent...
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“The marvellous thing about a singing horse is not that it sings well but that it can sing at all. To accomplish speech synthesis on a...

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“The marvellous thing about a singing horse is not that it sings well but that it can sing at all. To accomplish speech synthesis on a Spectrum with no additional hardware is a marvel of a similar order”.

Spectrum Computing issue 01

Screenshot of a CRT television set. Text on screen reads: The marvellous thing about a singing horse is not that it sings well but that it can sing at all. To accomplish speech synthesis on a Spectrum with no additional hardware is a marvel of a similar order.Spectrum Computing title screen. May/June issue (c) 1983

15.3.2024 06:58“The marvellous thing about a singing horse is not that it sings well but that it can sing at all. To accomplish speech synthesis on a...
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ZX Spectrum PlusD (clone) disk interface. The last of the parts arrived today so I blew the EPROM and programmed the GALs. And it worked!

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ZX Spectrum PlusD (clone) disk interface. The last of the parts arrived today so I blew the EPROM and programmed the GALs. And it worked!

An almost fully populated PlusD interface circuit board with three ICs missing. Using a GUI on an ancient Windows laptop to operate a USB programmer (a cheap TL-866-II clone) to program a GAL. Picture shows the programmer device sitting on the open laptop with the GUI on screen. A slim 20 pin IC is inserted in the programmer, and the device has a brightly glowing red LED.PlusD interface connected to a 48K ZX Spectrum. Floppy disks, drives and ribbon cables are strewn around. Yellow and red LEDs are brightly glowing on the PlusD. It has no casing, so the circuit board is visible.

2.3.2024 20:27ZX Spectrum PlusD (clone) disk interface. The last of the parts arrived today so I blew the EPROM and programmed the GALs. And it worked!
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Tell you what, going back to 1206 SMT components after working with 0805 scale devices is like moving paving slabs around. (Strawberry...

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Tell you what, going back to 1206 SMT components after working with 0805 scale devices is like moving paving slabs around. (Strawberry Chuppa Chupp for scale)

Detail of a partially assembled circuit board. Small SMT components on millimetres in size have been soldered to the board. A strawberry Chuppa Chupp lolly has been put into the photograph to give a sense of scale.

2.3.2024 20:01Tell you what, going back to 1206 SMT components after working with 0805 scale devices is like moving paving slabs around. (Strawberry...
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Well. Time to learn how to blow a GAL. 👨🏻‍🏭

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Well. Time to learn how to blow a GAL. 👨🏻‍🏭

Two DIP IC chips in plastic storage tubes, and several transistors in a small plastic bag.

1.2.2024 13:56Well. Time to learn how to blow a GAL. 👨🏻‍🏭
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I thought something was wrong with my PlusD disk interface so I took it apart for inspection… and who would’ve guessed it, the problem...

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I thought something was wrong with my PlusD disk interface so I took it apart for inspection… and who would’ve guessed it, the problem was just a duff floppy disk! 😩🥴😛💾💾💾

PlusDLite disk interface without its casing, plugged into a ZX Spectrum +2A. A couple of disks are scattered around with labels “Zeus Assembler” and Beta DOS”.

It’s never given me any trouble to be honest, it’s easily one of my favourite Spectrum accessories.

(I’ve no idea why I didn’t immediately suspect the well-used second-hand disk I got in a job lot from eBay!)

25.1.2024 23:55I thought something was wrong with my PlusD disk interface so I took it apart for inspection… and who would’ve guessed it, the problem...
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I quite often replay the original Tomb Raider around Christmas time, but I really associate it with the new year. Anyway this year I was...

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I quite often replay the original Tomb Raider around Christmas time, but I really associate it with the new year. Anyway this year I was looking up some of the secrets I’ve never found, and discovered a bug(?) in the PAL version: the third secret in The Cistern is inaccessible!

Screenshot of PAL version of Tomb Raider, the Cistern level. Lara Croft is standing on a stone balcony looking at a disguised moveable block that’s hiding a secret area. The texture of the block is slightly different to the surrounding walls.Screenshot of PAL version of Tomb Raider, the Cistern level. Lara Croft has moved the disguised moveable block but there’s a wall behind it blocking access to the secret area.Screenshot of NTSC version of Tomb Raider, the Cistern level. Lara Croft is standing on a stone balcony looking at a disguised moveable block that’s hiding a secret area. Unlike the PAL version the texture of the block is the same as the surrounding walls so it’s harder to find. (Note the screen borders as this is running on my 50Hz PAL Saturn!)Screenshot of NTSC version of Tomb Raider, the Cistern level. Lara Croft has moved the disguised moveable block revealing the secret area behind.

6.1.2024 11:50I quite often replay the original Tomb Raider around Christmas time, but I really associate it with the new year. Anyway this year I was...
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Well it might be the twelfth night but it’s not too late to post about my ADVANCED CHRISTMAS JUMPER SIMULATOR for ZX Spectrum. And do...

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Well it might be the twelfth night but it’s not too late to post about my ADVANCED CHRISTMAS JUMPER SIMULATOR for ZX Spectrum. And do check out the rest of the latest W00t! tapemag for loads more laughs and games.

ZX Spectrum screenshot. Image shows two people wearing ugly Christmas jumpers. The text reads Advanced Christmas Jumper Simulator.

5.1.2024 22:58Well it might be the twelfth night but it’s not too late to post about my ADVANCED CHRISTMAS JUMPER SIMULATOR for ZX Spectrum. And do...
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Moley Christmas, dudes. Cowabunga.

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Moley Christmas, dudes. Cowabunga.

“Moley Christmas” game for ZX Spectrum on cassette tape being held by Leonardo (Teenage Mutant Ninja Turtles) action figure, standing in front of a ZX Spectrum. Fairy lights in the background.

25.12.2023 00:26Moley Christmas, dudes. Cowabunga.
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ZX Spectrum Next

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ZX Spectrum Next

The glossy spot-varnished box of a ZX Spectrum Next along with some wrapped Christmas presents underneath a Christmas tree.

15.12.2023 21:33ZX Spectrum Next
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It’s important to stay organised in the hectic modern world of Information Technology.

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It’s important to stay organised in the hectic modern world of Information Technology.

A small red notebook with a Tip-ex’d label that now reads “Computer tapes log book”. In the margin are ball-point pen doodles, it appears to read “1992”First page of a notebook, reads “Saracen Paint piccys” and lists the tape positions of the picture-files named “Ferrari” and “Duck”. Underneath is written “Hungry Horrace Works on B side”

7.11.2023 13:41It’s important to stay organised in the hectic modern world of Information Technology.
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