Topic       : Pure Assembler Documentation
Author      : John Kormylo
Version     : PASM.HYP 1.0
Subject     : Documentation/Pure Assembler
Nodes       : 740
Index Size  : 20262
HCP-Version : 3
Compiled on : Atari
@charset    : atarist
@lang       : en
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@help       : Help
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View Ref-File[ Atari ST/TT/Falcon Hardware Peripherals ]

These chips include a WD1772 floppy disk controller, a MK68901 multi-
function peripheral, two MC6850 asynchronous communications interface
adapters, a YM2149 sound generator, and the Atari graphics chip set:
SHIFTER, DMA, MMU, GLUE and BLITTER.  The keyboard (IKBD) is actually
a separate computer.

The STE added a DMA Sound Chip and a LMC1992 volume/tone controller
with a MICROWIRE interface.

The TT added a second MK68901 MFP, a Z8530 serial communications
controller, a NCR5380 SCSI controller and a MC146818A real time clock
with 50 bytes of non-volatile memory.

The Falcon added a DSP56001 Digital Signal Processor, a CODEC 
Analog/Digital Converter and a Connection Matrix which can send
serial data between any of the sound devices.

The high density floppy drive replaces the WD1772 chip with the AJAX
chip.  This chip is pin compatible, but has double the data flow rate.

The Mega STE and TT support one single height (3U) VMEbus expansion
port (slave only).

These chips are attached to the data bus and are accessed by reading
or writing to specific memory locations (see Atari Memory Map).