This is an Amiga 4000 A3630 CPU Card reimplementation, simpler 2-layer board that supports only 68030/68882 in PGA package.
I am currently building a replica A4000 board and I want a simple way to test it. I could not find a used A3630 card and testing it on an expensive 68060 CPU card is out of the question, I wouldn't want to burn such an expensive card. So I decided to build a A3630 reimplentat...
68000 relocator for the Amiga 500(+)
with additional "Ranger" Memory .on the CPU bus (so not on the slow Chipmem bus).
expansion will disable internal trapdoor expansions that are not set to chipmem (A500 jumper on mainpcb)
output of U5 (memory decoder)
Y0 - $80000-$87FFFF
Y1 - $88000-$8FFFFF
Y2 - $90000-$97FFFF
Y3 - $98000-$9FFFFF
Y4 - $C0000-$C7FFFF
Y5 - $C8000-$CFFFFF
Y6 - $D0000-$D7FFFF
Il connettore H1 va collegato ad un deviatore. Con i pin 2 e 3 in corto si ha la modalità normale ovvero è come se il boot selector non ci sia. Con i pin 1 e 2 in corto il drive interno cessa di funzionare mentre il drive esterno viene visto dal sistema come DF0:
original enhanced gotek cloned from fikus842
I removed the smaller floppy connector (not used in Amiga) to created extra space to place the stm32 later and added the blue pill pinout for now.
the Blue Pill is used for ff_OSD (on screen display of the flash floppy info) and selection through the Amiga Keyboard.
This is the first setup, and connetors of the ff-osd are missing the power (GND + Power...
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