Search found 14 matches

by Regj
Sun Nov 19, 2017 4:44 pm
Forum: hardware
Topic: Electron Joystick interface and 'pokable' ports
Replies: 17
Views: 1015

Re: Electron Joystick interface and 'pokable' ports

Wow, thanks for the insight Mark; I'll look at doing just that.
I just love the support one gets on this forum.

Cheers
R
by Regj
Sat Nov 18, 2017 3:29 pm
Forum: hardware
Topic: Electron Joystick interface and 'pokable' ports
Replies: 17
Views: 1015

Re: Electron Joystick interface and 'pokable' ports

Dave.H, thanks for looking out an edge connector, unfortunatley I ordered one from Rapid Electronics before I started this thread and after much research. The one I now have doesn't have a key though just the full 50 pins. I'll now try printing a blanking key on my lovelly new 3D printer :) Mylin, T...
by Regj
Sun Nov 05, 2017 4:31 pm
Forum: hardware
Topic: Electron Joystick interface and 'pokable' ports
Replies: 17
Views: 1015

Re: Electron Joystick interface and 'pokable' ports

OK, Here is my simple way to use the existing Address decoding of the FirstByte Joystick board to provide output ports for driving LEDs or whatever - Just for fun. It seems that some of the addresses map to areas used by the OS or ULA. So only three additional 8bit ports can be used. This is my naiv...
by Regj
Fri Nov 03, 2017 4:55 pm
Forum: hardware
Topic: Electron Joystick interface and 'pokable' ports
Replies: 17
Views: 1015

Re: Electron Joystick interface and 'pokable' ports

1024MAK, Nice one, although it threw me at first. You actually have two versions shown 74LS367 and 74LS244 rolled into one diagram (neat). I also notice that the 74LS367 has different configuration of the buffers to the data bus compared to my version 3 (interesting); logic is the same though. D5 is...
by Regj
Thu Nov 02, 2017 7:43 pm
Forum: hardware
Topic: Electron Joystick interface and 'pokable' ports
Replies: 17
Views: 1015

Re: Electron Joystick interface and 'pokable' ports

Ok. I've not had so much fun with logic for 40 years... This is the circuit for the FirstByte Joystick interface revision 3. Figured the circuit out from the excellent pictures above. Painstakenly drawn in TinyCAD. I have made only one assumption - that 74LS367 pin 10 is tied to 5v - logic seems goo...
by Regj
Fri Oct 27, 2017 7:59 pm
Forum: hardware
Topic: Electron Joystick interface and 'pokable' ports
Replies: 17
Views: 1015

Re: Electron Joystick interface and 'pokable' ports

Well, how suburb is that - thanks for the high-res images guys.
I'm now in the process of drawing out the circuit and logic.
Good fun :D
I'll post the circuit when I have it.
The 2nd FB board seems to use a PAL for some of the logic otherwise pretty much the same

Thanks again.
by Regj
Fri Oct 27, 2017 2:49 pm
Forum: introduce yourself
Topic: Good morning from Sussex
Replies: 13
Views: 1067

Re: Good morning from Sussex

Welcome to a friendly Forum you will like it i'm sure.
by Regj
Fri Oct 27, 2017 2:47 pm
Forum: introduce yourself
Topic: Intro me
Replies: 14
Views: 821

Re: Intro me

Wow I'm really liking the kind of people on this forum and the help i'm already receiving.
by Regj
Thu Oct 26, 2017 6:59 pm
Forum: introduce yourself
Topic: Intro me
Replies: 14
Views: 821

Re: Intro me

CMcDougall
Thanks for the welcome.
And yes, it seems it's always a bit of a gamble that the ULA is working OK - mine is an issue 6 board with soldered in ULA.
by Regj
Thu Oct 26, 2017 5:13 pm
Forum: hardware
Topic: Electron Joystick interface and 'pokable' ports
Replies: 17
Views: 1015

Re: Electron Joystick interface and 'pokable' ports

Chris Acorns site has a jpg of the firstBytes interface. I cant quite see the TTL logic chips used though. Is there better diagrams images or perhaps someone has already reverse engineered this - that would be nice start :) I have to say I don't even know the memory address space it used or the soft...
by Regj
Thu Oct 26, 2017 4:35 pm
Forum: introduce yourself
Topic: Intro me
Replies: 14
Views: 821

Re: Intro me

OK thanks, I've started a new thread re the simple joystick/pokable ports idea in the 8 bit hardware area.
by Regj
Thu Oct 26, 2017 4:32 pm
Forum: hardware
Topic: Electron Joystick interface and 'pokable' ports
Replies: 17
Views: 1015

Electron Joystick interface and 'pokable' ports

Hi guys, I would like to start a project for a 'baby step' joystick interface board for the Electron, along the lines of the 'First Byte' Joystick interface board. I have in mind a relatively simple board with an Atari switched joystick stick port and perhaps a couple of 'pokable port's for leds etc...
by Regj
Thu Oct 26, 2017 4:14 pm
Forum: introduce yourself
Topic: Intro me
Replies: 14
Views: 821

Re: Intro me

Lol, Thanks for welcome.
by Regj
Thu Oct 26, 2017 3:24 pm
Forum: introduce yourself
Topic: Intro me
Replies: 14
Views: 821

Intro me

Hi all. I hail from Staffordshire and am now retired. I have recently got my UK101 back up and running and have turned my attention to the Acorn Electron. I have bought an Acorn Electron as my next project ( AE was not working but fixed by re soldering the 19v jack on the PSU board :) After a huge a...