User avatar
jiggoly

Posted Sat Mar 16, 2019 4:58 pm

Hi all, based on the EzdineG A1000 relocator I´ve made a remix Amiga 1000 relocator that includes a 27c160 EPROM (2MB) which can hold up to 4 different kickstarts. It also has a small board with a rotary switch to select the appropiate kickstart.
The installation is like EzdineG explained in another post, anyway here you have some pictures of the mod:

1 - Desolder U6J, put a socket and leave out the pin number 17
photo_2019-03-17_00-34-38.jpg
2 - Solder a resistor between pins 1 and 20 of U4K (I used a 4K7 1206 SMD resistor with 2 wires)
photo_2019-03-17_00-34-33.jpg
3 - Solder a wire to the via shown in the picture near U5M (I recommend to use a dupont wire and cut the connector of one side)
photo_2019-03-17_00-34-29.jpg

User avatar
jiggoly

Posted Sat Mar 16, 2019 5:13 pm

4 - You must also remove the ODD (U5P) an EVEN (U5N) half kickstart from the board.

Here is the relocator
photo_2019-03-17_00-34-23.jpg
and the rotary
photo_2019-03-17_00-34-13.jpg
The EPROM must be programmed using an adaptor for the TL866II plus programmer like this one
Programmer.jpg
The 2 jumpers of A18 and A19 are used to select the address of the 512K for each kickstart using the same config as the rotary switch.
e.g,:
A18 = 0 : A19 = 0 ------ 1ST KICKSTART (1.3)
A18 = 1 : A19 = 0 ------ 2ND KICKSTART (2.05)
A18 = 0 : A19 = 1 ------ 3RD KICKSTART (3.1)
A18 = 1 : A19 = 1 ------ ROMDIAG or other

For the moment I´m uploading the project to my github so when it´s up I´ll post the link.
Update: Here is the link to github----https://github.com/CrackenDesigns/Amiga4Kickstart

Best wishes.

User avatar
intric8
Seattle, WA, USA
Website

Posted Sat Mar 16, 2019 5:15 pm

This is a fabulous mod - thanks so much for sharing! Where are you going to mount the switcher?

User avatar
jiggoly

Posted Sat Mar 16, 2019 5:18 pm

This is awesome - thanks for posting!

Are you selling your homebrew boards?
Couldn´t finish the post :lol:

As I said on the second post all the info will be shared and you can order your own board and build it. I have 9 left but I made a mistake with the panelization and the small rotary has a missing ground plane.
This is a fabulous mod - thanks so much for sharing! Where are you going to mount the switcher?
Thanks so much ;)

My plan is to make a 3D small box to stick with velcro or something to the amiga.

User avatar
intric8
Seattle, WA, USA
Website

Posted Sat Mar 16, 2019 5:23 pm

Yeah sorry - I posted before I realized you were still at work. I quickly deleted it but ah well.
My plan is to make a 3D small box to stick with velcro or something to the amiga.
That's perfect. So cool!

User avatar
EzdineG
Springfield, MO

Posted Fri Mar 29, 2019 1:57 pm

Four roms and a nice, small footprint. Great work, Jiggoly!





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