[ATARI 800XL] Using extension bus

[[ATARI 800XL] Using extension bus]

Earl Rice, who worked on the 1450XLD at Atari also recommended using 74HCT chips. He wrote a 4 part series in Antic magazine called 'Parallel Bus Revealed'.

http://www.atarimagazines.com/v3n9/Parallel_Bus.html
http://www.atarimagazines.com/v3n10/parallelbus.html
http://www.atarimagazines.com/v3n11/parallel_bus.html
http://www.atarimagazines.com/v3n12/toolbox.html

[A8 ATX motherboard?]

 

 

But, you know... the 'fan base' does have all those nice additions to their 8-bits. But, what's the next level? What do they have to spend their money on?

 

Internal, mini-1090, the 1090Q? (1/4 sized)

 

VGA 1090Q card?

 

Dual POKEY/ digitizer 1090Q card?

 

HDD/CF 1090Q card?

 

Ethernet/USB 1090Q card?

 

 

Cramming all those kinds of things inside a regular Atari is a mess or outright impossible. Hanging them on the PBI is limited and cluttered. With a new motherboard and a pumped up case, it all can come together. The main board can house big memory, a 14mhz 65816, and lots of flash space, along with all the Atari legacy stuff. The rest goes in a 1090Q card.

 

Look at the 1090 motherboard on the left. It is mostly power supply - not needed. Look at the size of a 1090 card - way larger than we need with modern circuits. In a 1450XLD style case, the 1090Q cards can go in one drive bay and a disk drive can go in the other. Set your flat-screen VGA monitor on the top and you're off to the races.

 

Bob

 

DSC01361.JPG

Hey Bob. What are the cap values on your 1090?

[FS: Atari 5200 4-Port w/Games + Trak-Ball - $70 USD]

Is that shipped?

No. It's $70 + shipping.

[FS: Atari 5200 4-Port w/Games + Trak-Ball - $70 USD]

Hello,

I've had this 5200 for about 15 years now and am now ready to part with it. The price is $70 + shipping within the United States.




The console, games and controllers have been tested and are in working condition. All controllers have been cleaned and the joysticks reconditioned.

Because of the maintenance required with this console and the possibility of the average gamer junking it, I want it to go to a good home. Will accept payment through PayPal.


Note: There is some cosmetic damage to the unit. Part of the plastic case has chipped away and there are some scuffs. One of the joysticks has a tear in the rubber boot and there is also some gunk on the Trak-Ball case.

Items are listed as follows.


Console:

1 5200 4-Port with power supply and auto switchbox.

Controllers:

2 joysticks

1 Trak-Ball

Games:

Berzerk

Centipede*

Defender

Dig Dug

The Dreadnaught Factor

Galaxian

Jungle Hunt

Kangaroo

Missile Command*

Ms. Pac-Man

Pac-Man

Pitfall II: Lost Caverns

Pole Position

Q*bert

Qix

RealSports Baseball

RealSports Tennis*

River Raid

Soccer*

Space Invaders*

Star Raiders

Super Breakout*

Zaxxon

*Plays great with Trak-Ball.


Thank you for looking.

[800XL keyboard plug (on mobo)]

Best Electronics should have them in stock. I ordered a replacement connector and 800XL Stackpole keyboard from them 4 years ago.

Have you tried cleaning the connector with isopropyl alcohol?

[atari VCS keyboard]

 

The answer to the question...

The reason for it not being released would be:

the actions and decisions made by Mr. Jack Tramiel...

read more about "THE GRADUATE" @

http://www.2600connection.com/faq/vcs_system/faq_atarivcs.html#hardware6

 

No, James Morgan cancelled it at Atari Inc.

 

 

From the Atari Museum page:

 

"In September of 1983 James Morgan took over as head of Atari and among the numerous projects slated for cancellation was The Graduate and it was never released."

[-The real Atari 8bit Computer Successor]

The design that became the Amiga was already well underway at Atari before Jay Miner left Atari.

Gaza:

http://www.atari.com/history/computer-systems

 

1850XL

http://www.atarimuseum.com/computers/8BITS/XL/XL-Pages/xl-range-main.htm

Yes, more or less. Though in 1979, Jay Miner and Joe Decuir initially envisioned the system as a low cost game console/computer that would have looked more like an 800 or 500 with a built-in keyboard.

 

GAZA was a separate 68000 project.

[-The real Atari 8bit Computer Successor]

It's true from a hardware standpoint.the goofy os on the other hand was all commodore

No. The OS was largely programmed by the Amiga team (Carl Sassenrath, RJ Mical, Bob Pariseau, etc.). AmigaDOS was done by Metacomco.

 

On the hardware side, I think it was Commodore who decided to remove the NTSC circuitry from the Denise (Daphne) chip.

 

[Sneak Peak - Amiga Atari Design...]

Can you imagine what would've happened had Atari Corp and Commodore settled their lawsuits so that both would've had co-ownership of the Amiga chipset and thus released similar systems but with different OSes? That would've been interesting.

Yes, I especially wonder what the DOS portion would have been like.

 

Per the 1984 contract update, if each company were to develop different operating systems then software should be converted between the two. Mickey's BIOS would have been a subset of Exec (i.e. controllers, graphics primitives and other I/O).

[800 XL - Serial Numbers - Secam/PAL/NTSC]

*BUMP*

 

 

 

 

This is an NTSC 800XL. Notice the Warner Communications text is absent from the label. Could this be an Atari Corp. version?

There are also no socketed chips on the motherboard.

[Atari 800XL Keyboard - For Parts (eBay)]

SOLD.

[Atari 800XL Keyboard - For Parts (eBay)]

Hello,

 

I have begun selling various vintage computer items for those looking to repair them. The 600XL/800XL keyboard listed below is the first order of business.

http://www.ebay.com/itm/Atari-Keyboard-600XL-800XL-Stackpole-For-Parts-/271327035132

Thanks,
Bernard Anderson

[Why single density, and then whey "enhanced" density?]

As for DOS issues, didn't Atari have a DD-DOS on their hands from the 815 anyway?

 

Yes, Atari developed DOS 2.0D for the 815.

 

http://www.atarimuseum.com/computers/8bits/400800/815/815.html

[Desktop Missing Icons]

It might just be a bad drive.

[Why isn't the 130XE the dominant Atari 8bit?]

probably because tramiel was only interested in getting the RBP (the ST) into the market and the only way he could do that was via the XL (since the XE wasn't available then)

by the time the XE came along the ST had already started taking off (especially in europe) and anyway tramiel wasn't really interested in Atari's former products anyway, only what he bought into Atari (like the ST)

 

The XE and ST series both debuted in 1985, during which time Atari (Atari Corp.) continued to support the 2600, 5200 and XL computers.

[Unboxing of My First ST]

Yeah, I'm pretty sure it's a 1040 also. At least the case has to be because, from what I understand, all the 520's came without a floppy drive.

 

Not true. The original 520ST/STM had no floppy drive built in. However within a few years, it was replaced with the 520STF which used the same case as the 1040STF, including a built-in drive.

[Atari Sparrow Prototype]

There was also Robin, the proposed low-cost ST in a 65/130XE case.

 

Wasn't the Robin going to be an ST based game console?

[Rare puppy pong?]

Hmm. I'd rather spend half a million dollars on a legit Snoopy Pong.

[Will the CX-52 harness/cable work for CX-53 trak-ball?]

No, unless you supply +5V with an additional wire.

[Tritone (GTIA beeper engine)]

Almost sounds like a SID!

[Was there a reason why US 3rd party A8 compat. disk drives didnt come to UK]

Actually didn't Shiraz Shivji and the other ex-Commodore engineers attempt to use Commodore disk drive technology for future Atari Corp. products when they had the injunction filed against them?

 

Sorry, forgot to attach the link.

 

http://www.apnewsarchive.com/1985/Judge-Rules-Against-Commodore-in-Computer-Secret-Allegations/id-2828db7c7a0f046850244ea1eb43f406

[Was there a reason why US 3rd party A8 compat. disk drives didnt come to UK]

Well, after commodore engineers reverse engineered the atari chipset and stole the technology for use in the C=64, atari decided to flood the market with 1050s in order to crush any chances that aftermarket disk drive companies might have of selling products that were based on stolen/reverse engineered atari technology. There were already several well established aftermarket disk drive manufacturers in the US which already had a decent domestic market share prior to the big chipset reverse engineering scandal at commodore.. Atari did it's best to make sure they didnt grab any market share internationally. Jay Miner and Kurt Vendell (then a child, but secretly averting child-labor laws and working for atari) both spearheaded this operation by making secret visits to the UK and various European countries to buy up any aftermarket disk drive stock that may have made it to vendors' shelves..

 

*Evil laugh* Bwahahahaha!

 

 

Actually didn't Shiraz Shivji and the other ex-Commodore engineers attempt to use Commodore disk drive technology for future Atari Corp. products when they had the injunction filed against them?

[Building PAL 5200 from XL?]

Any updates on the project?

[Interesting Jay Miner interview (c. 1992)]

Perhaps amiga sites and users are somewhat more disrespectful or disingenous to someone that actually made a contribution to the original amiga design

 

I don't think there were ever a significant amount of Amiga fans wanting to downplay Joe Decuir's involvement or write him out of the company's history. If that were the case, RJ Mical would have probably already badmouthed him in his stand-up routines by now. Both Joe and Larry Kaplan ended up returning to Atari in 1983.

[Free from the CX52!]

Would love to see your schematic, Kensu. I incorporated a Video Touch Pad in a Masterplay clone I built.