Article View: comp.sys.atari.st
Article #5706Atari TT Block Diagram
From: Greg Csullog
Date: Tue, 14 Nov 1989 13:54
Date: Tue, 14 Nov 1989 13:54
169 lines
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8217 bytes
Here is a bit of information extracted from the ST Report
Magazine which sheds some well needed light on the state of the
Atari TT. The spec's have been listed elsewhere, however the
block diagram of the TT inards are very interesting!
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> TT - TT/X STR Tech Notes BLOCK DIAGRAM - FUNCTIONS - FEATURES
- 16 Mhz Motorola 68030 full 32 bit microprocessor
- Optional math co-processor MC68881/68882 Floating Point.
- 2 mb or, 4 to 16mb of RAM
- 512 Kb of ROM in 4 1mb chips
- 1.44 Mb 3.5" floppy drive, will handle 2 drives
WD 1772/2793 controller.
- VME bus Eurocard expansion
[ TT ] - 1 single slot
[ TTX ] - 5 slots
- ACSI internal bus with external connector for expansion
- SCSI internal bus with external connector for expansion
- Serial ports:
------------
- 2 asynchronous RS-232 ports 68901 MFP
- 2 asynchronous/synchronous RS-232 ports (Appletalk or
PromiseLAN) Zilog 8530 SCC
- Parallel port Yamaha YM-2149
- MIDI in/out ports
- Keyboard port (including mouse and joystick)
- Digital 8 bit stereo sound
- Stereo audio output jack
Monitor output (6 modes): RGB and Monochrome
--------------------------------------------
VGA monitor for colour modes, special monochrome monitor
Video modes:
-----------
Resolution Colours Palette
========== ======= =======
320x200 16 4096
320x480 256 4096
640x200 4 4096
640x400 "Duochrome"
640x480 16 4096
1280x960 Monochrome
- Battery backed Time/Date clock and 50 byte RAM
- 145 watt power supply
- Desktop packaging
- Operating systems
- ST TOS - Unix V Release 3.1
Further, Atari added (verbally) that the co-processor was the 16 Mhz
68881 (just plug in the chip, for the small TT it is included in the TTX),
the digital sound was the same as that in the new 1040STE (enhanced 4096
colors etc.), and joystick ports would support current joysticks and the
new 15 pin analog joysticks (both machines). Also, expect to hear more
about "Demand Paging Memory Management" (Unix), GLS, X-Windows
BAD NEWS:
The monitors will be proprietry as the STs are.(ie NO EASY WAY TO HOOK
UP A MULTISYNC) although if you could get a cable/connector it should
be easy to setup.
TWO MODELS:
===========
TT
==
- A desktop version in an AT style case w/30mb Hard Disk (limited
expandability) 1 VME Bus slot A24/D16 Eurocard
- ABSOLUTELY NO UNIX ON THIS VERSION. This version will be
released first.... sometime around the end of October 1989 and
mid November.
TTX
===
- A Tower configuration w/60mb Hard Disk, Multiple hard drive -
floppy - optical drive bays (3+) Will support both TOS and Unix.
- 5 VME Bus expansion slots; A32/D32 - A24/D16 - A16/D16 Eurocard
- Unix will be a separate release Item (as per STart interview
with Sam T.)
- TTX Release dates not set but will be during 1990.
Nota Bene;
To be expected, there will be some unavoidable compatibility problems
but, Atari is taking all the neecessary steps to maintain an extremely
high level of downward compatibility with existing software.
> TT - TT/X STR Tech Notes BLOCK DIAGRAM - FUNCTIONS - FEATURES
========================
_____________ _______
Midi in/out mouse
------------ Joystk
# -------
# #
__________ ___________ _____________ _________ _________
MC 68030 ROM 512kb MC 1468 18a 6850 ACIA 6850 ACIA
16mhz 4 x 1mbit --------- ---------
---------- ----------- ------------- # #
# # # # #
######################################################################
# # _______________ ____________
____________ ##### Yamaha YM2149 ____ Centronics
MC 68881/2 # Sound Chip __ Parallel
16 mhz __________ # ---------------_ ------------
------------ _ ST DMA # __________________ ______________
___________ "ACSI" ## Dual Purpose RAM ---- Drive Select
ACSI port - ---------- # 2 mb 64 bits wide --------------
----------- # ------------------
___________ _____________ # ______________ _______________
Flop port flop contrl # Memory Cntrl Stereo Audio
1mb - 2mb - WD 1772/2793# -------------- ---------------
----------- ------------- # ________
_________ ## FUNNEL -------- _______________
TT glue ######## --------_ __ Sound Shifter
--------- # ________ ---------------
___________ ______ ## FUNNEL --------___ _______ _______
SCSI port SCSI # -------- - VIDEO - Video
25 pin "D"###Cntrol###### ______________ Shifter out
----------- ------ #### MCS 8901 MFP __ ------- -------
# 2.4576 mhz _______________
# -------------- -- RS 232 Async.
# ---------------
# ______________ __ _______________
# MCS 8901 MFP -- RS 232 Async.
# 2.4576 mhz ---------------
# -------------- ________________
# --Ext. Interrupts
# ----------------
_________ ______________ # _____________ __________________
VME Bus VME - Bus ## NIBBLE Mode ####### Sys. Ram Option
System # R32/D32 ## Memory Cntr 4 - 16 mb Dram
--------- R24/D32 # ------------- ------------------
R24/D16 #
-------------- #### _____________ ___________________
# "A" Channel -+- RS 232 Serial 25p
# ------------- -------------------
##8530 SCC DMA _ LAN Systems
------------- -------------------
"B" Channel --- RS 232 Async 9p
------------- -------------------
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Technical Details
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!shadooby!samsung!usc!ucsd!ucbvax!AECLCR.BITNET!01659 From: 01659@AECLCR.BITNET (Greg Csullog) Newsgroups: comp.sys.atari.st Subject: Atari TT Block Diagram Message-ID: <8911150802.AA02649@ucbvax.Berkeley.EDU> Date: 14 Nov 89 13:54:00 GMT Sender: usenet@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 169