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Old 29 July 2018, 21:48   #1
indigolemon
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A1000 ROM Mod Install (Single Board A1K)

I can't take credit for the mod, or for the work to fit it! The board was created by EzdineG and details can be found here: https://amigalove.com/viewtopic.php?t=540

The board itself was made and sold to me by DjCook on Amibay (who I suspect may be 8 Bit Dreams here on EAB - either way, cheers man!).

Finally, the work was carried out by Daedalus here on EAB, the man has skills

The link above has instructions for doing this mod on the A1000's which have the daughterboard, the below shows how to perform the same mod on the Single Board A1000's.

Here is an overview of the mainboard, with the areas we need to work in highlighted:


RED: U6N DAUGCAS - Remove chip and fit socket, lifting Pin 17 - http://www.indigolemon.co.uk/linkedi...6N_DAUGCAS.jpg

BLUE: Remove existing ROMS - http://www.indigolemon.co.uk/linkedi...ylead_ROMS.jpg

YELLOW: Attach flylead (Pin 13 of U4S - DAUGEN) http://www.indigolemon.co.uk/linkedi...ylead_ROMS.jpg

GREEN: 4.8kohm resistor across pins 1 and 20 of U3J or U4J - http://www.indigolemon.co.uk/linkedi...om/U3J_U4J.jpg

And boom - you're done. Now have an HC533 running happily in my A1000 with a Kick 3.1 ROM

Last edited by indigolemon; 30 July 2018 at 11:56.
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Old 29 July 2018, 22:53   #2
Jope
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Nice job!

However I must say, daughterboard or not doesn't imply PAL/NTSC. I've had five A1000s in my life, all PAL, only one of them didn't have the daughterboard.
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Old 29 July 2018, 23:44   #3
indigolemon
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Quote:
Originally Posted by Jope View Post
Nice job!

However I must say, daughterboard or not doesn't imply PAL/NTSC. I've had five A1000s in my life, all PAL, only one of them didn't have the daughterboard.
Ah cool - cheers man, will amend the blurb - Can you update the thread title?

Last edited by indigolemon; 30 July 2018 at 00:30.
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Old 30 July 2018, 00:21   #4
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Was my first time operating on an A1000 - glad it all worked
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Old 30 July 2018, 07:30   #5
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Congrats on getting this mod done! Good to see it out in the wild.

Note that there’s a newer revision of this board that fits a second kickstart rom and a 3 pole switch to to select which ROM is active.

You can get the gerbers from the hardware subforum here on EAB or Amigalove to make boards for yourself or get premade boards from Djcook(EU) or Acill(US) and fit it in place of your existing board with no further mods.
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Old 30 July 2018, 11:55   #6
indigolemon
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Quote:
Originally Posted by EzdineG View Post
Congrats on getting this mod done! Good to see it out in the wild.

Note that there’s a newer revision of this board that fits a second kickstart rom and a 3 pole switch to to select which ROM is active.

You can get the gerbers from the hardware subforum here on EAB or Amigalove to make boards for yourself or get premade boards from Djcook(EU) or Acill(US) and fit it in place of your existing board with no further mods.
Thank you for doing the legwork to create it! Was really cool to be able to get the HC533 going in the A1K

DJCook mentioned the dual ROM version was out there now. Once more, nice work on that!
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Old 06 August 2019, 21:40   #7
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Hi All,

I am looking at threads to try to see the best way to do a mod for just a single ROM (the Romulator). I have a different Rev as to the one shown above so i am not sure how this mod would be affected. It is a NTSC Rev6 motherboard.

Here is a picture of the daughterboard. It seems that the chip in question i need to remove/alter is on the underside of the daughterboard.

Has anyone done the ROM mod for this version that has any insight into what is required ?




Last edited by kipper2k; 06 August 2019 at 21:46.
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Old 06 August 2019, 21:49   #8
EzdineG
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Hey, Kipper.

I believe we’re talking about the same daughterboard revision where I did the mod here:

https://www.amigalove.com/viewtopic.php?f=6&t=540

Let me know if I can be of any further help.
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Old 06 August 2019, 21:50   #9
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Quote:
Originally Posted by EzdineG View Post
Hey, Kipper.

I believe we’re talking about the same daughterboard revision where I did the mod here:

https://www.amigalove.com/viewtopic.php?f=6&t=540

Let me know if I can be of any further help.
Hey Thanks,
I will take a look and give it a go...

looks good, i'll start it now and finish up once i done measurements to make sure romulator fits, thanks very much
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Old 06 August 2019, 21:54   #10
EzdineG
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Quote:
Originally Posted by indigolemon View Post
Thank you for doing the legwork to create it! Was really cool to be able to get the HC533 going in the A1K



DJCook mentioned the dual ROM version was out there now. Once more, nice work on that!


Thanks for the kind words, indigolemon. Apologies I didn’t see this sooner.
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Old 06 August 2019, 22:33   #11
EzdineG
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A1000 ROM Mod Install (PAL A1K)

Quote:
Originally Posted by kipper2k View Post
Hey Thanks,
I will take a look and give it a go...

looks good, i'll start it now and finish up once i done measurements to make sure romulator fits, thanks very much


No problem. Let me know if sources for those boards will help with your project.
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Old 06 August 2019, 23:04   #12
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mods are done, just gotta do up a romboard. Thanks for the help
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Old 07 August 2019, 14:44   #13
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Here is my first attempt at the design for the A1k Kickstart and Rom adapter plate. Obviously it doesnt have a switch for dual ROM as that would be futile Don't go copying it yet, i am not sure if this is correct. Many thanks for the help EzdineG.

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Old 07 August 2019, 21:52   #14
PR77
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Unfortunately I don't own an Amiga 1000 (was the first Amiga I ever saw and set me on the path), but I'm pretty sure my Flash Kickstart Relocator project might be interesting for those wanting the capability of (flashable) kickstarts not on the Amiga Motherboard;

https://github.com/PR77/68000_Relocator_FLASH_Kickstart

Although this hasn't been designed for the Amiga 1000, I believe some concepts could be considered.
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Old 07 August 2019, 22:03   #15
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nice, i think i have lots of the xilinx kicking around
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