[continued from previous message]
http://madteam.atari8.info/index.php?prod=stereo
- SimpleStereo by Candle, 2003-2008
http://www.spiflash.org/block/9.html
- Stereo Expansion rev.2.1 by Mega-Hz, 2010
http://www.mega-hz.de/Angebote/Stereo/Stereo_small.html
- Includes bass boost and GTIA sound amplifier
- Earlier prototype: Stereo Expansion rev.1.2, 2008
http://www.mega-hz.de/Angebote/Stereo/Stereo_big.html
- POKEY stereo / Gumby supporting software:
http://a8.fandal.cz/search.php?search=stereo&butt_details_x=x
Stereo Blaster Pro (Programmable), by Portronic/AMC-Verlag (1995?)
Andreas Koch writes: This add-on had only 1 small paddle, to amplify the
sound volume; the stereo-sound could be generated via two simple POKE
statements; a demo disk was included.
See:
http://www.strotmann.de/~highland/amc/amcprogs.html
"Covox" project, original by Psychol/MadTeam
- 4 channel, 8-bit sound playback (8-bit PCM)
- Digital to analog (DAC) converter based on the Covox Speech Thing for PC
-
http://atariki.krap.pl/index.php/Covox
- Covox compatible projects:
- Easy 4 channels * 8 bits Covox C/A, by: Gumi/Tight
http://ftp.pigwa.net/stuff/mirror/www.atari.cuprum.com.pl/covox.htm
- Covox upgrade by Gumi, re-written by Pigula/Shpoon
http://ftp.pigwa.net/stuff/mirror/www.atari.cuprum.com.pl/covox_2.htm
- SimpleStereo by Candle, 2003-2008
http://www.spiflash.org/block/9.html
- Covox-supporting software:
- Inertia 3.7, by Tebe/MadTeam, 1996
- Inertia 4.5, by Profi/MadTeam
- Protracker 1.51, by Profi/MadTeam, 1997
- NeoTracker 1.7, by Epi/Tristesse, 2002-2007
- More:
http://a8.fandal.cz/search.php?search=covox&butt_details_x=x
------------------------------
Subject: 6.10) What graphics enhancements are there for the Atari?
Full-View 80, by Bit 3 Computer Corporation (1982)
- Plugs into RAM slot 3 (rear slot) of the Atari 800
- Composite video output;
Recommended: Display monitor having a minimum bandwidth of 10MHz
- 80 x 24 character display (no graphics modes)
- Characters are in a 8 x 10 matrix with full lowercase descenders
- Total screen resolution: 640 x 240 pixels
- At launch, supporting software included:
- Atari BASIC, BASIC A+, OS/A+, EASMD, Microsoft BASIC (mostly),
Atari Pascal, Atari Assembler Editor, Atari Maco Assembler (mostly);
80 column versions of: LJK Letter Perfect, Data Perfect, Edit 6502
Austin 80, by Austin Franklin Associates (1983)
- Video Processor Board plugs into RAM slot 3 (rear slot) of the Atari 800;
Console Software cartridge plugs into right cartridge slot of the Atari 800
- Composite video output;
Recommended: Display monitor having a minimum bandwidth of 10MHz
- 4 RGBI color output bits
- Optional: RGBI Adapter Board for use with (color) RGB monitor
- 80 x 25 character screen (no graphics modes)
- 7 x 9 character size in a 8 x 10 block, with full descenders
- Sold separately by Austin Franklin in support of the Austin 80:
- SWP 64K ATR8000 w/CP/M 2.2; MPP Smart Terminal;
80 column versions of: LJK Letter Perfect, Data Perfect;
Austin 80 Console Software
XEP80 Interface Module, by Atari (1986)
- Plugs into joystick port 1 or 2
- Composite video output (high resolution monochrome recommended)
- Software driver on diskette
- 80 x 25 character screen (internal 256 x 25 character storage area)
- 7 x 10 character cells
- 320 x 200 Pixel Graphics mode
- See XEP80 section of this FAQ list for additional details
VBXE - VideoBoard XE
- First release: Version 1.2 by Tomasz Piorek (Electron/TQA) (2008)
- Versions 2.0 (2009) and 2.1 (2013) by Sebastian Bartkowicz (Candle)
- For Atari XL/XE
- Board mounts in the Atari in place of the ANTIC chip, which is moved to
the VBXE board. Additional connections must be made between the VBXE board
and the Atari motherboard as well.
- Functions like GTIA, though GTIA remains functional as well
- Provides RGB output (DE-9 or SCART connector options)
- Up to 1024 colors on screen from 21 bit palette
- Graphics resolution up to:
- 640x480i (640x240p) in 64 colors
- 320x240p in 1024 colors
- 160x240p in 1024
- True 80 character mode for text display
- Blitter with 7 modes of operations capable of zooming displayed data,
transparency, collision detection and many other features
- Fully downward compatible with GTIA chip
- Developer website:
http://spiflash.org/block/15.html
- VBXE 2.1 for XE available:
http://lotharek.pl/product.php?pid=82
- VBXE 2.1 for XL available:
http://lotharek.pl/product.php?pid=106
- VBXE software production list:
http://gury.atari8.info/vbxe_prod.php
------------------------------
Subject: 6.11) What types of memory upgrades are there for the Atari?
Thanks to Andreas Koch for his earlier extensive work on RAMdisk versions.
This section attempts to list all commercial or hobbyist project upgrades
to the amount of (volatile) random access memory (RAM) installed in the 8-bit Atari.
Devices that use non-volatile mass storage media would be listed elsewhere in this FAQ list.
400/800 Memory Upgrades
-----------------------
As intended by Atari, RAM management in the 800 is accomplished in hardware
via the presence of one, two, or three 8KiB or 16KiB RAM Module boards in the computer's three RAM slots, for a system of 8KiB, 16KiB, 24KiB, 32KiB, 40KiB, or 48KiB of RAM. The 400 was designed to use a single internal 8KiB, 16KiB,
or 32KiB RAM board of the same design as those for the 800 (though Atari only offered the 400 in 8KiB or 16KiB RAM versions).
- 4KiB boards
These make an additional 4KiB available to the computer in the 4KiB of
memory address space (49152-53247 or $C000-$CFFF), unused by the 400/800
hardware or Operating System, directly beyond the normal 48KiB RAM address
space as intended for use by Atari. These can be used with standard 8KiB,
16KiB, 24KiB, 32KiB, 40KiB, or 48KiB RAM systems. See also: 52KiB boards
- Ramrod, by Newell Industries (800 personality board), 1982
- MEM/EX, by Prairie Physics (800 personality board), 1983
- Impossible!, by Computer Software Services (CSS) (400/800), 1984
- 4K Static RAM-Pac board also sold separately by CSS
- The Gap, by Computer Support (400/800), 1985
- 8KiB boards
Boards may be used in any 800 RAM slot or in the 400 internal RAM slot.
- Atari CX852 (remove board from case for installation inside the 400)
- 16KiB boards/upgrades
Boards may be used in any 800 RAM slot or in the 400 internal RAM slot.
- Atari CX853 (remove board from case for installation inside the 400)
- JACC 16K (1980; first non-Atari memory expansion board)
- Microtek AT-16 / AMB-16 (no imprint on board)
- Intec 16K
- Anderson Peripherals / Tiny Tek 16K Memory Board (800 only - why???)
- Bontek 16K
- Mosaic 8K to 16K RAM Expansion Kit (400)
- 32KiB boards/upgrades
A 32KiB board, "properly" designed, may be used in 3 places: in the 400
internal RAM slot, or in either of the first two RAM slots in the 800. Less
rigorous designs do not work in the 800 first RAM slot. In the 800 a 32KiB
board must be installed in combination with an 8KiB or 16KiB board also in
slot 1 or 2, or utilize another solution that taps the other slot for the
necessary chip select lines.
- Axlon RamCram / Rampower 32 (400 or 800 middle RAM slot)
- Mosaic 32K RAM Board (400 or 800 first two RAM slots)
- Optional Companion Board for use in the 800 without another RAM board
- Mosaic Expander is the same but shipped with 16KiB and sockets for
16KiB RAM chips taken from a 16KiB board
- Mosaic Adapter is the same but shipped with no memory but sockets for
32KiB in RAM chips taken from two 16KiB boards.
- Microtek AMB-32 (400 or 800 middle RAM slot) (no imprint on board)
- MPC Peripherals Corp AT-32 (400 or 800 middle RAM slot)
- Same as earlier Microtek AMB-32 but with "MPC AT-32" imprint
- Microtek AMB-32A (400 or 800 first two RAM slots)
- board: "Microtek AMB-32"
- "Slot Intepdendent Memory Card"
- Intec 32K MM1632 (400 or 800 first two RAM slots) (1982)
- Anderson Peripherals / Tiny Tek 32K Memory Board
- Bit 3 32K Memory Plus (400 or 800 middle RAM slot)
- Tech-Data (TD) 32K
- Calisto Computers 32K (400)
- Austin Franklin 32K Austin Board (400 or 800 first two RAM slots)
- Optional 32K Loopback for use without another RAM board
- Bontek 32K
- High Country MicroSystems (HCMS) Ram-Page 32K
- Tara Computer Products Atari 32K RAM
- HardStuff 32K RAM Board
- 48KiB boards/upgrades
If designed for the 400, these must modify the computer to support the S4
and S5 RAM chip select lines and, for continued cartridge support, the RAM
deselect lines RD4 and RD5 as all supported in the 800. If designed for the
800, these boards are used in the middle RAM slot, and must modify the
computer or utilize another solution that taps the S0 and S1 RAM chip select
lines from slot 1. Also, these physically used 64KiB in DRAM chips because
such designs were much simpler and less expensive than a design using chips
actually totaling 48KiB.
- Intec 48K MM6448 (400) (1981)
- Dynamic Technologies 48K Memory Expansion Kit (400)
- Axlon RamCram Plus / RamPower 48 (400). Two installation options:
- 40KiB available, or 48KiB with supplied board in cartridge slot
- No computer modification required
- 48KiB available (requires computer modification)
- Sar-An Computer Products (SCP) 48K (400)
- Neotechnic Industries (NTI) 48K Ram Kit (400 or 800)
- Micro Systems Exchange (MSX) 48K Upgrade Kit (400)
- Austin Franklin 48K Austin Board (400 or 800)
- Optional 48K Loopback card required for use in the 800
- Mosaic 48K Ram Kit (400)
- Maplin/Mapsoft 48K RAM card (400)
- Calisto Computers 48K (400)
- Essence Peripheral 48K
- Polly Products 48400 (400)
- Xtra HardWare XTRA48 (400 or 800)
- Tara Computer Products 48K RAM for the Atari 400
- A 48K Upgrade For Your 400, project by Claus Buchholz, MACE Newsletter,
(Michigan Atari Computer Enthusiasts), 9/82
- Atari 400 48K Memory Modification Instructions, by Gary A. Crowell with
Steven P. Davies, (c)1983
- Atari 48K RAM Expansion Kit (400) (June 1983)
- 52KiB boards/upgrades
These have the same features/capabilities as 48KiB boards/upgrades but make
an additional 4KiB available to the computer in the 4KiB of memory address
space (49152-53247 or $C000-$CFFF), unused by the 400/800 hardware or
Operating System, directly beyond the normal 48KiB RAM address range. The
result is 52KiB of continuous, non-banked RAM available while still running
the standard 400/800 OS in memory as well.
- Tiny Tek 48K/52K (400 only)
- Newell 48/52K Ram Board (400 or 800)
- Xtra HardWare XTRA52 (400 or 800)
- 64KiB and up boards/upgrades
Surpassing the limit of 52KiB continuous RAM address space available in the
400/800 requires a memory-banking scheme for using software-selectable
memory banks that share a range of memory addresses within the normal 52KiB
RAM address range. Atari never offered such a solution, but several
different third-party schemes emerged.
"Axlon" bank-selection type
Banks are 16KiB, visible at 16384-32767 ($4000-$7FFF). Bank selection is
controlled by writing a bank number to ANY address in the ranges 4032-4095
($0FC0-$0FFF) (mirror) OR 53184-53247 ($CFC0-$CFFF) (latter range
recommended by Axlon; byte 53247 ($CFFF) used by popular convention).
A value of 0 selects the main/normal bank, and values from 1 to 255 select
an extended bank. Scheme supports up to 4080KiB of banked RAM (255 banks of
16KiB each) for a total system RAM potential of 4128KiB (4080KiB + 48KiB).
- Axlon RamDisk / RamPower 128 (800 middle RAM slot)(1981)
Provides 8 16KiB banks of memory, one of which is available to the
computer at a time as part of the normal RAM of up to 48KiB. With a
total of 32KiB installed in the other two RAM slots, the total system
potential is 160KiB.
- Toggle switch supports configuration as 128KiB or 16KiB for added
software compatibility
- Shipped with CREATE utility that modifies Atari DOS 2.0S into:
Axlon RAMDisk MMS V1.0 (Memory Management System) (D4: RAMdisk)
- 1st 3rd-party Axlon RAMdisk: ADS Integrater (1983)
- Detailed elsewhere in this FAQ List (800 personality boards)
- Newell Industries 128K RAM Upgrade for 800 (800 middle RAM slot)
Provides 8 16KiB banks of memory, one of which is available to the
computer at a time as part of the normal RAM of up to 48KiB. With a
total of 32KiB installed in the other two RAM slots, the total system
potential is 160KiB.
- Crystal Computer Products (CCP) 128 K RAMCard (800 middle RAM slot)(1986)
Provides 8 16KiB banks of memory, one of which is available to the
computer at a time as part of the normal RAM of up to 48KiB. With a
total of 32KiB installed in the other two RAM slots, the total system
potential is 160KiB.
- Can be configured as 128KiB or 16KiB for added software compatibility,
either via jumper pins or via optional hardware switch.
- Crystal Computer Products (CCP) 256 K RAMCard (800 middle RAM slot)(1986)
Provides 16 16KiB banks of memory, one of which is available to the
computer at a time as part of the normal RAM of up to 48KiB. With a
total of 32KiB installed in the other two RAM slots, the total system
potential is 288KiB.
- Can be configured as 256KiB or 16KiB for added software compatibility,
either via jumper pins or via optional hardware switch.
- Super Products SuperRAM
(256KiB piggyback board for 16KiB board in middle RAM slot)
Provides 16 16KiB banks of memory, one of which is available to the
computer at a time as part of the normal RAM of up to 48KiB. With a
total of 48KiB installed in the three RAM slots, the total system
potential is 304KiB.
- Magna Systems Ramcharger 256K (800 middle RAM slot)(1986)
Provides 16 16KiB banks of memory, one of which is available to the
computer at a time as part of the normal RAM of up to 48KiB. With a
total of 32KiB installed in the other two RAM slots, the total system
potential is 288KiB. Includes on-off switch for added compatibility.
- Magna Systems Ramcharger 512K (800 middle RAM slot)(1986)
Provides 32 16KiB banks of memory, one of which is available to the
computer at a time as part of the normal RAM of up to 48KiB. With a
total of 32KiB installed in the other two RAM slots, the total system
potential is 544KiB. Includes on-off switch for added compatibility.
- Magna Systems Ramcharger 1Mb (800 middle RAM slot)(1986)
Provides 64 16KiB banks of memory, one of which is available to the
computer at a time as part of the normal RAM of up to 48KiB. With a
total of 32KiB installed in the other two RAM slots, the total system
potential is 1056KiB. Includes on-off switch for added compatibility.
- Incognito, by Sebastian Bartkowicz (Candle'O'Sin), 2012
- 1MiB Axlon compatible memory expansion for Colleen mode
- Device detailed elsewhere in this FAQ list (800 personality boards)
"Mosaic" bank-selection type
Banks are 4KiB, visible at 49152-53247 or $C000-$CFFF. Writes to 65472-
65507 or $FFC0-$FFE3 enable specific banks (65472 or $FFC0 = bank 0, 65473
or $FFC1 = bank 1, etc.). Writes to 65280-65471 or $FF00-$FFBF, or to
65508-65535 or $FFE4-$FFFF, disable all banks. Scheme supports 36 banks,
for a total system potential of 192KiB (48KiB + 36 banks of 4KiB).
- Mosaic 64K Ram Select (400 or 800 any RAM slot) (400/800 version or early
400-only version) (1982)
- Single board provides 48KiB "hard-wired" plus 4 banks of 4KiB
addressed directly beyond the normal 48KiB limit, for 52KiB of
continuous memory available to the computer.
- In the 800, may be used in combinations including two 16KiB boards,
one 32KiB board, one 16KiB board and one 32KiB board, or with one or
two additional Mosaic 64K Ram Select boards (total of 10 possible
configurations). Each 64K Ram Select allows the computer to see all
the memory of the other boards, makes enough of its own memory
available to the computer to reach the continuous RAM limit of 52K,
and makes the rest of its memory available to the computer in banks of
4KiB addressed directly beyond the normal 48KiB limit. Total system
potential with three 64K Ram Select boards is 192KiB (48KiB + 36 banks
of 4KiB).
- Cable Kit/Cable Connectors #1 required in 400 or with first 64K Ram
Select in 800; Cable Kit/Cable Connectors #2 required with 2nd or 3rd
64K Ram Select in 800; use of one 64K Ram board with one 32KiB board
requires Companion Board in middle RAM slot in 800
- 48K Boot Fix program included for compatibility with software written
to treat more than 48KiB available as not enough memory available.
- Software sold separately by Mosaic:
- Handyman by Holiday Software (software utility package; routines
reside in bank select RAM; useable with BASIC and Assembler Editor)
- SuperDrive by Starship Enterprises (c)1983 H.V. Stacey (Stace)
- GENVDOS installation program modifies Atari DOS 2.0S to support
a Mosaic RAMdisk, and to support DUP.SYS and/or MEM.SAV residing
on the RAMdisk.
- Included with later 64K Ram Select units
Neither Axlon nor Mosaic bank-selection type (but very similar to Axlon)
- A 48K Upgrade For Your 400, project by Claus Buchholz, MACE Newsletter
(Michigan Atari Computer Enthusiasts), 9/82, including "Suggestions for a
64K Modification" ("MACE Mod")
Provides one 16KiB bank of memory, bank-switched with the "middle" 16KiB
of the 48KiB RAM, visible at 16384-32767 or $4000-$7FFF, for a system
total of 64KiB RAM. Write a 1 to a memory location between $D700 and
$D7FF (55040 to 55295 decimal; byte 55295 ($D7FF) used by popular
convention) to enable the banked memory; write a 0 to the same location
to disable banked memory.
- Atari 800 Plus 256K, project by David G. Byrd
48KiB of normal user memory and 240KiB of "extended memory". Uses the
$4000-$7FFF banked region, with bank selection at $D7xx (byte 55295
($D7FF) used by popular convention). Versions:
- 1983 original (WHERE????)
- July 1985 S.N.A.C.C. Newsletter (Southern Nevada Atari Computer Club)
- Revision A - Oct 1985.
- Computer Shopper magazine, Feb 1987
- Rev: D, Ver. 1.6 (maybe this is the Computer Shopper version?)
Used with GENEMDE by H.V. Stacey, to extend DOS 2.0S to produce EMDE/OS
with 240KiB RAMdisk support.
- Intec 64K MM6464 (400)
- Explicitly supported by later versions of MachDOS.
- Seems rather likely this is a commericalized version of the 48K/64K
MACE Mod by Claus Buchholz; can anyone confirm????
- The WindHover Atari 400 SuperRam Modification project by Jay Torres and
Jerry Rombert, a (1985?) clone of the 48K/64K MACE Mod by Claus Buchholz
- The Windhover Project memory upgrades for the 800, by Jay Torres.
96KiB/160KiB/288KiB version appeared in the Manitoba Atari Computer Club,
October 1985; Windhover DOS sold separately. Essentially the same as the
Byrd upgrade. WindHover 288K SuperRam version 1986
- Atari 800 512K RAM Card, by Bob Hays
- With battery backup
-
http://www.bobhays.com/atari512k.html
Others, bank-selection type unknown (WHO CAN VERIFY?????)
- High Country MicroSystems (HCMS) Ram-Page 64K (400 or 800)
- "For the 800 provides up to 96KiB".
- Xtra HardWare XTRA64 (400 or 800).
- HardStuff 64K RAM Board (400 or 800)
XL/XE Memory Upgrades
---------------------
In Atari XL/XE computers, memory location 54017 ($D301), known as PIA Port B
or PORTB, is used to manage access to portions of built-in ROM and RAM that share ranges of memory addresses. See another section of this FAQ list describing the Atari memory map and banked memory management for details.
Memory upgrades that increase the RAM in the 16KiB 600XL to 32KiB or to 48KiB provide the computer with additional main memory only.
Memory upgrades that increase the RAM in the 600XL to 64KiB are designed to give the 600XL the same RAM specifications as the 800XL.
Memory upgrades that increase the RAM of a 64KiB XL/XE computer to 128KiB are designed to give the computer the same RAM specifications as the 130XE.
In the 130XE there are 4 16KiB extended RAM banks available at 16384- 32767/$4000-$7FFF, where banks are selected using bits 2-3 of PORTB. XL/XE memory upgrades to more than 128KiB RAM provide additional 16KiB extended RAM banks at 16384-32767/$4000-$7FFF, and the additional banks are selected using additional bits of PORTB. This may result in loss of functionality otherwise associated with the co-opted bits of PORTB.
"True ANTIC banking" describes the ability, as in the 130XE, for the 6502, ANTIC, both, or neither, to access the currently-selected bank of "extra" memory, based on the settings of PORTB bits 4-5 (CBE and VBE).
32KiB system total, for the 600XL
- RC Systems AM2, plugs into the PBI, 1984
- W.E.Electronics 16KiB, plugs into the PBI, 1985
- Card could be upgraded from 16KiB to 32KiB
48KiB system total, for the 600XL
- RC Systems AM1, plugs into the PBI, 1984
- FirstWare (Mosaic) 48K Expander (internal), 1984
- Expander Package Upgrade Kit upgrades 48K Expander to 64K
- W.E.Electronics 32KiB, plugs into the PBI, 1985
64KiB system total, for the 600XL
- 64KiB internal daughterboard by BOT Engineering, 1983. Possibly only
installed in some new 600XL units for sale in Canada and never marketed
directly to consumers.
- Atari 1064, plugs into the PBI, 1984
- Provides pass-through interface for additional PBI devices
- Only 48KiB of 64KiB in DRAM chips is used; the computer's internal
16KiB RAM remains enabled as well for 64KiB system total
- MPP MicroRam 64K Memory Board, plugs into the PBI, 1984
- RC Systems AM64, plugs into the PBI, 1984
- FirstWare (Mosaic) 64K Expander (internal), 1984
- W.E.Electronics 48KiB, plugs into the PBI, 1985
- 600XL 64K Kit, by Computer Service Land (internal), 1986
- 600XL to 64K RAMKit, by Computer Support, 1986
- 600XL to 64K internal upgrade kit, York Computer Centre, 1987
- Atari 600XL to 64K RAM project by Ken Sumrall, 1987
- Innovative Concepts Ramdrive + 64K (16KiB to 64KiB internal), 1987
- 64K Upgrade for 600XL project by Don Neff, February 1988 issue of
Michigan Atari Magazine
128KiB system total (Atari 130XE standard)
PIA Port B bank-selection bits used: 2,3
2 bank-selection bits allows selection of 2^2 = 4 16KiB memory banks.
- Innovative Concepts Ramdrive + 128K (65XE 64KiB to 128KiB)
- True ANTIC banking
- Innovative Concepts Ramdrive + XE-GM1 (XEgs 64KiB to 128KiB) (1988)
- True ANTIC banking
- Innovative Concepts Ramdrive + XL to XE (800XL/600XL 64KiB to 128KiB)
- True ANTIC banking ("including Extended Antic modes") (1989)
192KiB system total
PIA Port B bank-selection bits used: 2,3,6
3 bank-selection bits allows selection of 2^3 = 8 16KiB memory banks.
- Compy-Shop 128K for 600XL
- No separate ANTIC banking. (Question: Is 6502/ANTIC banking
simultaneous, or does ANTIC have no access to banked memory?????)
- Innovative Concepts Ramdrive + 192K (130XE 128KiB to 192KiB), 1988-11-11
- True ANTIC banking (?)
- Innovative Concepts Ramdrive + XE-GM2 (XEgs 128KiB to 192KiB). Upgrade
for XEgs with IC's XE-GM1 128KiB upgrade already installed.
- True ANTIC banking
256KiB system total
4 bank-selection bits allows selection of 2^4 = 16 16KiB memory banks, but
there are only 12 "extra" banks available because these REPLACE the
computer's main 64KiB RAM.
"Newell" bank-selection type
PIA Port B bank-selection bits used: 2,3,5,6 (only 12 banks available)
PORTB Bit 5 use is inverted relative to the later "Rambo" type.
- Newell Industries 256KXL for 800XL/1200XL, ANTIC 'E' required, 1985
- ANTIC has no access to banked memory
- Main memory is protected from bank-selection.
- Shipped with MYDOS 4.x
- SCXM Sector Copier (1985) sold separately
- 256KXL Mods published by Newell
1. Allow 6502/ANTIC simultaneous banked memory access via PORTB bit 4
2. Main memory can be bank-selected.
- NOTE: After the RAMBO XL gained strong marketplace acceptance, the
Newell 256KXL was replaced with the Newell 256KXLE, see below.
"Rambo" bank-selection type
PIA Port B bank-selection bits used: 2,3,5,6 (only 12 banks available)
PORTB bit 5 use is inverted relative to the earlier "Newell" type.
- 130XE-Compatible 800XL 256K Upgrade, project by Claus Buchholz
- Revision of his "Quarter-Meg Atari 800XL" project, Byte 9/85, (which
used 32KiB banks and was not 130XE-compatible)
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
- Main memory can be bank-selected.
- Ramaster, by ABC Consulting, for 800XL
- Commercialized version of the Buchholz 130XE-Compatible 800XL 256K
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
- Main memory can be bank-selected.
- RAMBO XL by ICD, for 800XL or 1200XL, 1986
- Commercialized version of upgrade of same name by Madison Area Atari
Users Group (MAAUG) published Oct-Nov 1985, itself a close derivative
of the Buchholz 130XE-Compatible 800XL 256K Upgrade.
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
- Main memory can be bank-selected.
- 800XE PLUS, by Triple "C" Computer, for 800XL or 1200XL, 1986
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
"It's entirely compatible with the 130XE"
- 256k RAM for 800XL, by Computer Support, 1986 (may be "Newell" type????)
- "Includes Ramdisc software for all DOS systems"
- "Full 130XE compatibility"
- Magna Systems Ramcharger 256K for 800XL or 1200XL, 1987
- ANTIC has no access to banked memory.
- Innovative Concepts Ramdrive + XL (800XL 64KiB to 256KiB), 1987
- True ANTIC banking (???? mc doubts it)
- Yorky, design by Dave Malham for York Computer Centre (1987), then
Richard Gore (1993), for 800XL or 64KiB 600XL
- Plugs into the PBI
- Uses the 600XL/800XL power supply; supplies power for the computer
- 3-way switch: Off, 64K, or 256K
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
- Wizztronics 256K for 800XL, c1990 (by Steve Cohen)
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
- Newell 256KXLE, for 800XL/1200XL, c1991
- NOTE: Replaced the earlier Newell 256KXL
- True ANTIC banking
- Shipped with MYDOS 4.5x and COPY256E sector copier
- CSS Power Plus, 800XL or 65XE installation
- True ANTIC banking
- Atarimax 256k Memory Upgrade for 800XL and 1200XL
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
- Reimaged Rambo XL 256k Memory Upgrade, by Bits of the Past, (2011?)
- For 800XL or 1200XL
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
- Reimaged Wizztronics 256k Memory Upgrade, by Bits of the Past, (2011?)
- For 800XL
- Separate versions for ANTIC C012296 or ANTIC C021697
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
- SuperRAM, by Super Products, for 600XL/800XL
- No soldering required
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4 320KiB system total
4 bank-selection bits allows selection of 2^4 = 16 16KiB memory banks.
These ADD to the computer's main 64KiB RAM.
"Atari magazin" bank-selection type
Bank-selection is the same as the "Rambo" type but with 16 banks available.
PIA Port B bank-selection bits used: 2,3,5,6
- The 130XE/320K upgrade by Scott Peterson, 1985
- ANTIC has no access to banked memory.
- Credits the 800/288K upgrade (D.G.Byrd) and the 800XL/256K upgrade
(C.Buchholz) for inspiration
- The Windhover SuperRam 130XE Upgrade, by Jay Torres/The Windhover Project
- Published in the Windhover Newsletter 1985
- Clone of the 130XE/320K Upgrade project by Scott Peterson
- ANTIC has no access to banked memory.
- The 65XE 130XE/320K Upgrade! by Scott Peterson (for the 65XE), 1986
- 100% compatible with the previous 130XE/320K upgrade by Scott Peterson
- ANTIC has no access to banked memory.
- Magna Systems Ramcharger 320K for 130XE, 1987
- ANTIC has no access to banked memory.
- Innovative Concepts Ramdrive + XE (130XE 128KiB to 320KiB), 1987
- True ANTIC banking (?)
- Atari magazin "320 KByte im Eigenbau" for 800XL, by Rolf Schmidtke,
issue 1987n2p56; bugfixes/updates 1987n3p54, 1988n4p62, 1988n5p86
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
- Innovative Concepts Ramdrive + 320K (65XE 64KiB to 320KiB)
- True ANTIC banking
- CSS Power Plus, 130XE installation
- True ANTIC banking
- RAM 320XL, by ctirad, for 600XL/800XL, 2010
- Plugs into the PBI
- Standard mode ADDS 256KiB of expansion memory. This gives a 16KiB
600XL 272KiB system total, while a 64KiB 800XL has 320KiB system
total.
- Remapped base RAM mode DISABLES internal RAM, makes 64KiB main memory
available from the RAM 320XL device, for 320KiB total
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
-
http://atariage.com/forums/topic/162420-ram-320xl/
- SuperRAM, by Super Products, for 130XE
- 6502/ANTIC banking is simultaneous only, controlled by PORTB bit 4
"Compy-Shop" bank-selection type
PIA Port B bank-selection bits used: 2,3,6,7
- Compy-Shop 256K, versions for 800XL or 130XE (versions for any others?)
- True ANTIC banking
- Megaram XL/XE (Version 1, Version 2, or Version 3 256KiB installation),
by Klaus Peters, for 800XL, 800XE, 65XE, 130XE, or XE System Console.
- ANTIC has no access to banked memory.
- Fixes for refresh errors:
http://www.b-pahl.de/atari8bit/RAM-Disk/doku/BugFix/bugfix.html
Multiple bank-selection types supported
- 256 kByte im 800XL project by Bernhard Pahl
- Two modes: Atari magazin and Compy-Shop
-
http://www.b-pahl.de/atari8bit/RAM-Disk/800xl_1/800xl_1.html
- 256 kByte im 800XLF / 65XE / 800XE / XEGS project by Bernhard Pahl
- Two modes: Atari magazin and Compy-Shop
-
http://www.b-pahl.de/atari8bit/RAM-Disk/800xe_1/800xe_1.html
- 256 kByte im 130XE project by Bernhard Pahl
- Two modes: Atari magazin and Compy-Shop
-
http://www.b-pahl.de/atari8bit/RAM-Disk/130xe_1/130xe_1.html
- RAM-Erweiterung 256kB fur 130XE, by Heuser Family (2005). Two modes:
- Rambo/Atari magazin mode with 6502/ANTIC simultaneous banking
- Compy-Shop mode with true ANTIC banking
-
http://www.asselheim.de
512KiB system total
5 bank-selection bits allows selection of 2^5 = 32 16KiB memory banks, but
there are only 28 "extra" banks available because the computer's main 64KiB
RAM has been REPLACED.
- 512K Atari 800XL/1200XL V1.1, by Dan Schmidt. For computers that
already have a 256K RAMBO XL or Claus Buchholz upgrade installed.
- NOTE: The original non-V1.1 version does not work!
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