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Apple IIgs - ROM 04, “MARK TWAIN”

uniserver

Well-known member
I guess the powers to be, Were not all that excited about this model.

From what i know this revision had:

- Ram SIMM Slots

- A better ROM, some more features

- Comes with a SCSI Card

- Comes with a internal 3 1/2 Floppy

- Comes with a 40mb HD

This reminds me of that PDS Apple IIe card you could install in the LC/Quadra machines.

What about the IIgs software? IIgs card?

Its like the Macintosh Side left the IIgs in the dust.

Pictures:

ROM4.JPEG- http://www.hackzapple.com'>http://www.hackzapple.com'>http://www.hackzapple.com

marktwain_frontview.jpg - http://apple2history.org'>http://apple2history.org

marktwain_insideview.jpg - http://apple2history.org

KF6C.JPEG - http://www.hackzapple.com

http://apple2history.org/history/ah11/#10

ROM 04, “MARK TWAIN”
And yet, there were still efforts within Apple to bring about a final revision to the Apple IIGS, one that would make it better and more capable. The IIGS still had people within the company who poured out their hearts in making changes to improve the computer, both in software and hardware. Some of these same people had created the advances in the GS/OS system software that made the computer faster without requiring any changes in hardware, and also made it possible to take advantage of new peripherals as they became available. With this same fervor, they had indeed been creating the rumored next generation Apple IIGS.

The IIGS they were creating was a logical extension of the capabilities of the current models of the computer, combined with the features that were most needed to provide usability with the new IIGS software that was appearing. The newest versions of GS/OS continued to require more memory to properly run, so this computer was built with 2 Meg of RAM on the motherboard. For RAM upgrades beyond this minimum, the older memory expansion slot was eliminated, and replacing it was two slots for SIMM (single inline memory modules) RAM cards. These compact packages were becoming the industry standard, and were being included in all newer Macintosh models.

The firmware code in the ROM 04 IIGS was to include the new tools that later appeared in GS/OS System 6 (tools that would be loaded into RAM at boot time with older IIGS models, just as the ROM 03 tools were loaded from disk in ROM 01 computers). With the increased size and complexity of System and application software, a hard drive was changing from a luxury to a necessity, and so a 40 Meg SCSI hard drive was included. And to make the SCSI experience complete, a DMA SCSI port was to be included on the rear panel for attachment of additional SCSI devices. The SuperDrive (mentioned above) was also to be included as a built-in device, making it possible to have a very complete IIGS system without the need to have additional hardware attached. As a finale to the new system, HyperCard IIGS would be bundled with this computer when it was released. The one predicted enhancement that did not make the final cut was a speed increase beyond the original 2.8 MHz.

The code name assigned to this new Apple IIGS was “Mark Twain”, likely because of the writer’s oft-repeated quote, “The rumors of my death have been greatly exaggerated.” It was to be a triumph over the writers in the media who continued to insist that the end of the Apple II line of computers was just around the corner.

This wonderful new Apple IIGS had many things going for it, but the one thing that it did not have was someone in a position of power at the company who would champion the machine, and push for its full support and promotion. This had been the biggest problem with the IIGS beginning with its original release in 1986. After its product introduction, which involved a couple of television and magazine ads, Apple turned its attention to other concerns and left the Apple IIGS to sell itself. What promotion was done for the IIGS or products associated with it was done with all the fervor Apple had applied to the Apple II line since the Apple III had been designed (in other words, very little).
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Does anyone own one of these?

i think it would be cool to have one!

TWAINM.GIF - http://www.hackzapple.com

 

uniserver

Well-known member
* looks at my IIgs on the shelf *

* looks at the dremel *

* looks at a good LC PSU over on the Floor *

* looks on the shelf for an extra 800k auto inject * * Spots one!! *

* wonders, should i? *

:cool: :?: :lol: 8-o

 

uniserver

Well-known member
I should wait. i also want an internal scsi hd as well. one of those 10K screamers :)

and i am outta terminated SCA to 50 pin scsi adaptors i need to order a couple more.

So to make it really nice i would need one of those nice stereo sound cards. and a scsi card.

Both of those i do not have.

 

CC_333

Well-known member
Hi,

Since the Apple II platform is inherently more open in nature*, hasn't anyone released schematics for this ROM 04 GS? If so, maybe one could build a clone, inside of which could be all these improvements that the ROM 04 promised (the Apple II architecture is quite simple relative to the Macintosh (save for maybe the original) from what I understand).

c

*Unlike the Macintosh, which, after 30 years (well, 29 years, one month and four days :) ) has come full circle (eliminating internal expansion, and essentially making it into a closed box).

 

waynestewart

Well-known member
It’s a multi-layer board so it’d be hard to do a circuit diagram without destroying it. Just as importantly, it’s got a lot of custom chips. Thirdly, the units found were prototypes and didn’t function 100% correctly. (super drive only worked as 800k, SCSI interface was slower than production card)

Even if you got past those problems, you probably couldn’t sell it at a price that many people would pay.

The idea behind it was to have a less expensive unit for educational purposes. The upgrades would have been interesting in a new machine but a lot of us have a IIgs with better hard drive interfaces, working super drives and so forth. Not much incentive to spend $1-2k or more on a Mark Twain replica.

Would be interesting to see one of the protype IIgs clones and what changes they made

 

uniserver

Well-known member
COOL!

COOL!

hey here is the same page translated to english:

http://translate.google.com/translate?sl=auto&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Ftulip-house.ddo.jp%2FDIGITAL%2FSDISK2%2Findex.html&act=url

I wonder if B M O W mac floppy emu, can be made to work with the IIgs… if so… * drool * it would make that device even more valuable to me.

 

Computist

New member
Tony Diaz has a couple of these. They make regular appearances at KansasFest. As mentioned above, none of the Mark Twains are 100% functional, and they all operate just a little differently from the each other. Joe Kohn had one (not sure where that ended up.) - there are a small number floating around, though. Also, the IIsi =/= the Mark Twain. It's not entirely clear that the IIsi existed as an actual functioning machine, though the fact that it got as far as tooling before the Contessa project was cancelled seems to suggest it may have been further along than just a block of wood.

 
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