Tag: Hardware

Hollywood or Dust: Episode 5 – Fashionable

[Repairing the PSU from an SGI Iris Indigo R3000] Reassembly After replacing damaged diode CR111, it's time to reassemble the PSU and give it a try. Reassembly is a bit easier than disassembly, but still very fiddly, especially getting all the spade connectors back where they are supposed to be. Needlenose pliers are needed, and … Continue reading Hollywood or Dust: Episode 5 – Fashionable

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Hollywood or Dust: Episode 4 – Vitamin E

[Repairing the PSU from an SGI Iris Indigo R3000] The postman has delivered my replacement 1N5352 zener diode (actually three of them, I figure this might take a couple of tries, and I might need another one for a subsequent repair in another 25 years). Vitamin E However, before wielding the soldering iron, I am … Continue reading Hollywood or Dust: Episode 4 – Vitamin E

Hollywood or Dust: Episode 3 – Just Another Sucker On The Vine

[Repairing the PSU from an SGI Iris Indigo R3000] Reboot After two weeks off from Retrochallenge due to other commitments, it is time to re-energise this project. I need to remove the obviously-broken diode CR111 from the large PCB, (a) to see which exact model of diode it is, so I can order a replacement, and … Continue reading Hollywood or Dust: Episode 3 – Just Another Sucker On The Vine

Hollywood or Dust: Episode 2 – Zarking Genius

[Repairing the PSU from an SGI Iris Indigo R3000] More Investigation In the last episode, I managed to extract one of the boards from the PSU and found it to be in superb condition. But what about the other, larger PCB? Although I could see parts of it "in-chassis", I really needed to remove it … Continue reading Hollywood or Dust: Episode 2 – Zarking Genius

Hollywood or Dust – Episode 1: Down the Rabbit-Hole

[Repairing the PSU from an SGI Iris Indigo R3000] Oops, Retrochallenge 2017/10 has been running for a week already - better pull myself together and make an actual start on my project! Peculiarly Special The Iris Indigo has a slightly complex PSU history and situation. The original Indigo, based on the MIPS R3000 CPU, uses … Continue reading Hollywood or Dust – Episode 1: Down the Rabbit-Hole

Hollywood or Dust

As is often the case with hardware this old, my 1991 SGI IRIS Indigo R3000 will not start. Well, that's not quite completely true... Symptomania: When pressing the power-switch, the fan did not spin, neither of the two SCSI disk drives spun up, the screen remained resolutely blank, and the cute Indigo power-on tune did … Continue reading Hollywood or Dust

The Return of The Thin

I have recently acquired an old HP T5510 32/128 "thin client" device - a dedicated remote-graphical-terminal, manufactured in 2004 (not my pictures, I'll get those up in due course): With the addition of a VGA monitor, USB keyboard and mouse, and an Ethernet cable, this device can connect to remote RDP and Citrix services. Well, … Continue reading The Return of The Thin

With A Cherry On The Side – Episode Three (terminal setup and more hardware)

[A Project to interface a PS/2 keyboard to a 68hc11 microcontroller] Get Cracking! So I have the target microcontroller SBC, and have verified it is still working. Today I have been setting up more project equipment. First off, I will need to be able to run my favourite simple command-line 68HC11 cross-assembler to generate loadable … Continue reading With A Cherry On The Side – Episode Three (terminal setup and more hardware)

With A Cherry On The Side – Episode Two (How to run code from non-existent ROM)

[A Project to interface a PS/2 keyboard to a 68hc11 microcontroller] The Case of the Unmissing PROM Last time, I mentioned that there was something a bit unusual about my 68HC11E1 MCU, running the BUFFALO monitor program from on-chip PROM. Well, the issue is that the E1 model 68HC11 isn't supposed to have any on-chip … Continue reading With A Cherry On The Side – Episode Two (How to run code from non-existent ROM)

With a Cherry On The Side – Episode One

It's kinda strange to be doing this in April instead of January, but as the RetroChallenge schedule has changed, it is time to get my plan together. Inspired by previous attempts, my modest entry to RetroChallenge this time is to interface a PS/2 keyboard to a 1987-vintage 68hc11 micro-controller; enough to at least read the … Continue reading With a Cherry On The Side – Episode One