22 Jun 2014 - 3 min read
Register Construction: A and D 8-bit Registers
I haven’t posted in nearly a month but in between bouts of enjoying the rare British sunshine I’ve been plodding away at the A/D register card and it’s now …
26 May 2014 - 2 min read
Register Construction: Completed B and C 8-bit Registers Full Test
The B/C Register card is now complete and looks like this: As usual I’ve put a video together which demonstrates this card in operation … firstly on its own but …
24 May 2014 - 4 min read
Register Construction: B and C 8-bit Registers
As mentioned in my last post I decided this time around not to post after each stage of card construction (being as the construction steps are now pretty similar to those for …
11 May 2014 - 6 min read
Register Design: B and C 8-bit Registers
In a recent post I put up the design for the A and D 8-bit register card … the B and C register card is very similar in design but has the additional complexity that it …
10 May 2014 - 1 min read
Just need to quickly share my experience with what I’m dubbing the ‘magic pen’ before I put up the B/C register schematics (yup, they’re finally …
05 May 2014 - 6 min read
Enclosure Update: Fitting of Laser Cut Parts
I was going to spread the fitting of the laser cut parts to the lower enclosure over a couple of evenings but in a fit of geeky excitement I ended up doing it all in one …
03 May 2014 - 4 min read
Enclosure Update: Laser Cut Parts Arrived
I’ve been looking forward to this moment for nearly a month … the laser cut parts I ordered to move my enclosure construction forward have finally arrived. The …
24 Apr 2014 - 5 min read
Register Design: Dual Output 8-bit Register
In the last post I introduced the design for the A/D register card (which as its name suggests contains the A and D 8-bit registers). I’m now making a start on the …
20 Apr 2014 - 5 min read
Register Design: A and D 8-bit Registers
In the last post I introduced the design for a general purpose 8-bit register. This post covers taking two of those registers along with status LEDs and gating relays to …
16 Apr 2014 - 4 min read
Register Design: General Purpose 8-bit Register
This post covers the design of a general purpose 8-bit register that can be loaded from the data bus and then selected back to the data bus at a later time. This permits …
10 Apr 2014 - 5 min read
Enclosure Update: Laser Cutting
I couldn’t resist it any longer … I’ve ordered the laser cut parts for the case doors, sides and bay floor/ceilings. I did say I’d wait for my chosen …
30 Mar 2014 - 3 min read
Following my last post on the completed backplane I’m now in a position to connect all the other completed cards together to test the full ALU. The ALU is made up of the …