TREXoldcomputer
Member
Another solution is making a redundant hack: solder in the chip RAM chips (valid only for revision #6 and #8.x boards) and then add a little circuit to have 1Mb chip and 512kb ranger. So the A500 will have 1Mb & 512kb Ranger. 1.5Mb RAM expandable to 9.5Mb (10.5Mb using a Megachip or other 2Mb Agnus board)!
The circuit is very small but requires a couple of hard to find TTL ALS chips.
Here is the hack (not my work, the diagram belongs to Pekka Pessi, revised by Hemiyoda):
Unfortunately, it does not work on REV6A. Amiga turns on but the game starts, the program hangs.
Workbench shows 1MB chip and 0.5 SLOW.