Amiga custom chips

Gary provides glue logic for bus control and houses supporting functions for the floppy disk drive.

It integrates many functions built discretely in the earlier Amiga 1000 in order to reduce costs.

Akiko is responsible for implementing system glue logic that in previous Amiga models were found in the discrete chips Budgie, Gayle and the two CIAs.

Akiko assists this conversion in hardware, instead of shifting the bits solely by CPU code which would cause more overhead.

The conversion works by writing 32 8-bit chunky pixels to Akiko's registers and reading back eight 32-bit words of converted planar data to be copied to the display buffer.

[2] Buster is the expansion BUS conTrollER[3] and was used in the Amiga 2000(B), integrating discrete logic from the original A2000(A).

In the A3000 and A4000 series, Ramsey controls the on-board 32-bit Fast RAM, four banks of either 1 or 4 MiB, and provides address generation for Super DMAC.

[8] A combination of SDMAC 02 + Ramsey 07 generally works, but major hard disk errors have been reported.

Amber was also designed to work without expensive field memory as a simple scan doubler, but has not been marketed that way.

The Vidiot is a hybrid integrated circuit that works as digital-to-analog converter (DAC) for the OCS/ECS generation's 12-bit video to analog RGB output.