Found only in the A3000 series and A4000T machines, the Ramsey is responsible for addressing RAM and producing DMA addressing, particularly with regards to the motherboard SCSI controller. Ramsey 04 is normally used with DMac 02, and Ramsey 07 is normally used with Dmac 04.
| Chip Number |
Part Number |
Used in |
| Ramsey |
390398-01 |
A590, A2091 |
| Ramsey 51 |
390541-04 |
A3000, A4000 |
| Ramsey 45 |
390541-07 |
A3000T, A4000, A4000T |