768 kB RAM expansion - expands the A1000 to 512 kB ChipRAM and 512 kB Ranger RAM (slow FastRAM)
24 64k×4 DIPs
supports two different address ranges for the 512 kB FastRAM:
$080000 - $0fffff - 1 MB contiguous RAM in total
$180000 - $1fffff - results in two separate 512 kB blocks
with a soldered in SPDT switch, the two address ranges can be easily changed
the A1000 front slot lacks the required amount of signals for addressing 768 kB, so 14 wires (ribbon cable) to four ICs have to be soldered in the A1000
supports PAL and NTSC A1000, i.e. with and without daughterboard
with Kickstart 1.1, the memory has to be added via AddMem command
with Kickstart 1.2, the FastRAM is detected as ChipRAM by the Amiga, therefore a command has to be executed to change it to FastRAM, after that the memory has to be added via AddMem command as well
a special Kickstart disk ('MegaKick 1.2') was available as an option which automatically enables the additional 512 kB
connects to the front panel expansion slot - slim expansion, fits under the original front cover
supports disable switch, needs to be soldered in
expansion was available without RAMs, to be added by the user