Atari TT030 Hardware Reference Manual

The developer-facing hardware description of the Atari TT030, June 1990: memory map, the System Control Unit and the interrupt structure, DMA, the VMEbus implementation (one single-Eurocard A24/D16 slot to VMEbus revision C.1), the SCSI interface (NCR 5380 on a 25-pin connector), the WD 1772-02 floppy controller, the MC146818A real-time clock, the TT and ST video modes and the sound subsystem.