Tag: Hardware

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

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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

Evie Beer: Episode 4 – External Hardware

The last week has been very busy with non-project stuff, but I have managed to make progress on constructing some simple external hardware for the 68hc11 EVB to interface to. For most starter "microcontroller mucking about" projects, playing with a few LEDs is de riguer, and Evie Beer is no exception: You can ignore the … Continue reading Evie Beer: Episode 4 – External Hardware

Evie Beer – Episode 2: Waiting for Hardware

My RetroChallenge project has started slowly for me this time around, after ordering the requisite MC68hc11 EVBU single-board computer on Sunday 28th June, it didn't arrive until the following Friday, and as I had an appointment on Friday night, did not get to actually open the box and check it out until today. So what … Continue reading Evie Beer – Episode 2: Waiting for Hardware

Watts Up: Episode 14 – Ear Cable

After suspecting that I had killed both my production and spare SPARCstation-10 motherboards, it is time to prove it one way or the other. For SPARCstation-class machines, there is a handy trick that can be used to prove the main memory bus, the memory-controller, the CPUs, the basic "aliveness" of the on-board peripheral devices, and … Continue reading Watts Up: Episode 14 – Ear Cable