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The GBA1000 is the spiritual successor to the Phoenix. It is a motherboard replacement that uses original chips, yet manuy upgrades.

CPU: Motorola MC68030 at 40 or 50 MHz
FPU: Motorola MC68881 or MC68882 at CPU-speed
RAM: 8 Mbyte 32-bit SRAM, 2 Mbyte ChipRAM
Chipset: ECS Amiga (ECS-Denise 8373 and Fat Agnus 8372/8375)
Built-in flicker-fixer with VGA-output
1 Zorro-II slot
1 MB Flash-ROM
RTC
IDE
Two KS-sockets
A1K Case Compatible

This is this guy's 7th build!
MORE: https://www.amigalove.com/viewtopic.php?t=2633