Thinking of building your own Acorn Atom ??

discussion of games, software, hardware & emulators relating to the Acorn Atom
Post Reply
lezanderson
Posts: 12
Joined: Wed Feb 27, 2013 10:42 am
Contact:

Thinking of building your own Acorn Atom ??

Post by lezanderson » Fri Jan 19, 2018 12:11 pm

Free DIY/Homebrew Acorn Atom ICs

For anyone wanting to design their own homebrew Acorn Atom I’ve got some surplus ICs for the job. Anyone interested should email me (email me at lezanderson@gmail.com) . I can only handout stuff to those that are serious about building a DIY Acorn Atom, as there's only limited stock. So it's First come first served.

65C02 DIP40
6522
82C55
6847
various SRAMs 32K,64K,8K etc
Various EEPROM/EPROMs 8K,16K,32K,64K etc
EPM7032SLC44-xx CPLD
DS12887 RTC
AY-3-8910
SN76489
7805 Regulator

*************************************************************************************
*************************************************************************************

If you’re repairing Acorn Atom computers then :

* Sadly I can’t supply ICs to repair old Atoms.. Best to go to eBay.com

eBay.com prices (for repairing)

R65C02P4 …….………... $1.90
R6522………………...…….$1.50
82C55……………...……….$1.05
6847………..……..……….$3.50

lezanderson
Posts: 12
Joined: Wed Feb 27, 2013 10:42 am
Contact:

Re: Thinking of building your own Acorn Atom ??

Post by lezanderson » Mon Jan 22, 2018 2:28 pm

There's an interesting Acorn Atom project here :

http://www.mtxworld.dk/memorum/viewtopi ... 2482#p2482


Might be worth a look ?

User avatar
oss003
Posts: 2724
Joined: Tue Jul 14, 2009 11:57 am
Location: Netherlands
Contact:

Re: Thinking of building your own Acorn Atom ??

Post by oss003 » Mon Jan 22, 2018 3:21 pm

Wow, that's a fast Atom ....... :shock:
Hopefully all other chips can deal with this speed.

Greetings
Kees

Prime
Posts: 2473
Joined: Sun May 31, 2009 11:52 pm
Contact:

Re: Thinking of building your own Acorn Atom ??

Post by Prime » Mon Jan 22, 2018 11:53 pm

oss003 wrote:Wow, that's a fast Atom ....... :shock:
Hopefully all other chips can deal with this speed.
With modern RAM and the WDC65c02, you should be able to crank things up a bit. I seem to remember having my Atom clone running at at least 4MHz, I think I also pushed it further. Mind it does have Xilinx CPLDs for the address decoding and buffering logic so will certainly be faster than the LS :) There's even a version of the 8255 that's good up to 10MHz : NEC µPD71055.

The AtoMMC code was problematic with this but that could be re-engineered to use a proper handshaked data exchange like DragonMMC so that it doesn't use the wait loops that will run faster on a faster CPU......

Cheers

Phill.

User avatar
NilByMouth
Posts: 23
Joined: Mon Nov 06, 2017 11:42 pm
Contact:

Re: Thinking of building your own Acorn Atom ??

Post by NilByMouth » Wed Jan 24, 2018 9:19 pm

* Sadly I can’t supply ICs to repair old Atoms.. Best to go to eBay.com

eBay.com prices (for repairing)

R65C02P4 …….………... $1.90
R6522………………...…….$1.50
82C55……………...……….$1.05
6847………..……..……….$3.50
If you don't mind waiting up to 2 months for delivery... :)

Malc

User avatar
daveejhitchins
Posts: 4080
Joined: Wed Jun 13, 2012 5:23 pm
Location: Newton Aycliffe, County Durham
Contact:

Re: Thinking of building your own Acorn Atom ??

Post by daveejhitchins » Thu Jan 25, 2018 10:11 am

NilByMouth wrote:If you don't mind waiting up to 2 months for delivery... :)
Probably get them all from Mark at RetroClinic . . . Quicker and known working.

Dave H :D
Parts: UM6502CE, GAL22V10D, GAL16V8D, AS6C62256A, TC514400AZ, WD1772, R6522, TMS27C512, AT28C256
Products: ARA II, ABR, ATI, AP6, MGC, AP5 . . .
For a price list, contact me at: Retro Hardware AT dave ej hitchins DOT plus DOT com

User avatar
NilByMouth
Posts: 23
Joined: Mon Nov 06, 2017 11:42 pm
Contact:

Re: Thinking of building your own Acorn Atom ??

Post by NilByMouth » Thu Jan 25, 2018 10:42 am

daveejhitchins wrote:Probably get them all from Mark at RetroClinic . . . Quicker and known working.
Yeah, I should have thought of that before shelling out £7.50 for a 6847 on eBay UK.

Malc

Post Reply