warerat

My personal favorite is HDSC from drac030: http://drac030.krap.pl/en-sparta-pliki.php

The stock OS board is designed to take custom mask ROMs with extra chip selects that don't exist on EPROMs so you don't need additional external decoding circuitry. My advice is if you don't want to redesign the OS board, design a piggy-back board that plugs into the the ROM socket that swaps pins and provides the logic to further decode the chip enable for an EPROM, or perform the decoder circuit modification for an EPROM, don't plug in the wrong chip and just to use a mask ROM that the socket is wired for.

It is none of those. It is a custom mask ROM with two active-high and one active-low enable.

The FP ROM and 2716 EPROM have completely different pinouts. It's even a stretch to say that 2532's would work in place of these because it's certainly not true in the case of the OS board. Can it be made to work? Sure. Piggyback another 74LS138 on top of the one at Z401. Bend up all the pins except 4, 6, 8, 16-- these are soldered to the 'LS138 below. Connections for top 'LS138: Connect pins 2 and 3 to pin 8, connect pins 4 and 5 together, connect pin 5 from the bottom 'LS138 to pin 1 on the top 'LS138. Connections for EPROM: Pull it out and bend up pins 18, 20, 21 and plug back in. Run wire from pin 21 to pin 24 on EPROM. Connect pins 18 and 20 together and connect this pair to pin 14 of the top 'LS138.

1. The reasonable price for me is irrelevant-- I assure it you it's not a matter of funds. A reasonable price for the community? <$70. 2. Unplug the paddle board and plug the two IC's back and you can use 800 cards again. This paddle board reduces the number of soldered connections you have to make. There's one or two threads on this if you search this forum. 3. The design works as advertised and then some. The Newell Fastchip is using the FP routines written by Charles Marslett. You can find a copy of the ROM dump with the examples that come with the excellent MADS assembler. The FP ROM I have is dated 1981 and the version included with MADS is 1984.

Yes, that's the configuration of my board, as seen here: http://www.atariage.com/forums/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=196093

Yes its, two 8K EPROMs with shared FP and Omnimon/Omniview. But this requires additional modifications to the board and the manual has the instructions for it. Yep, its real and on my desk in the other room. There's interest but maybe not at the volume I'd expect to make a run of boards with a reasonable price point for all. Not to mention those who don't want to do any soldering. I could be wrong but I think there was maybe a dozen interested parties. I'm certainly not worried and I'm glad I don't use your criteria because it's more like six connections to the CPU board including the custom paddle board that goes under the cart plastic after pulling two ICs on the motherboard.

Nothing to dump because all the board does is provide sockets to either: - Customize your OS ROM to run off EPROM - Plug in your stock ROMs - Allow Omnimon or Omniview to co-exist with OS ROM - Allow SRAM to populate the 4K hole You could also conceivably break the XL OS down to individual EPROMs and run that, sans the RAM under the ROM. So the ROMs have been dumped and already exist.

Not really, because there's that nutty little thing called a space between Atari and 800 and then that ambiguity is gone. I have a RAMROD board for the Atari 800. The manual states you must pull your OS and FP ROMs from your OS board or jumper it for EPROM use.

I think I read it in the instructions. For now read this post, although he does mention DOS XL - I'll scan the Bit 3 Corporation Full-View 80 manual shortly, I could be mistaken. I guess the extra 4K memory probably only magically appears on a "Jay Miner" 800 because on the unremarkable "Atari" 800, the Bit 3 board only physically contains 2K of static RAM which is the local screen memory to the CRTC and not the system address space. For now read page 28 of the Bit 3 manual. I could be mistaken.

The Bit 3 does not add any additional memory to the 800 so I don't know where this came from.

It's posted under the "People who have a penchant for derailing auctions" in the hydroponic gardening thread.

I crap on your JAZ drive. I got my Sony SMO-F551 5.2GB Magneto-optical (using only 512-bytes out of the native 2048-byte sectors) to work. Too bad it makes terrible use of the sector capacity.

I've never seen schematics for this design as I think these boards are less common than the Bit-3 (come to think of it, I've never seen Bit-3 schematics either). It would be fun to source the obsolete controller and rebuild one but I think the VBXE provides an excellent all-in-one alternative. But here they are: eBay Auction -- Item Number: 370286787372 I'd bet the reference design from the datasheet isn't too far off from what they were producing.

Fantastic! This confirms why I always wondered why the ICD "Version 2" sources for the 80-column card included an Austin Franklin font ROM. The design is almost 1:1 to the AF80, down to the same oddball SMC9007 controller!

Y quien eres vos? El hoyo del queque?

EXSEL is only present on the last slot and is used by the Bit-3 and AF80 boards.

Here are my Axlon 32K and 128K boards. There are several different brands of clone 32K boards that exist. The switch on the 128K disables the memory. The ROM board is the Newell Ramrod that goes in the personality module slot. Also have the Bit-3 80-column card. I also have a working harder-to-find Austin-Franklin 80: http://www.atariage.com/forums/topic/154535-austin-franklin-80-information/

Can't see enough detail in the picture for a positive identification, but likely a 32K card. Certainly not a factory 16K board.

Top half is blank because you are loading a 16K image on a 32K device. Load ROM file at offset $4000 for a 27256. The MIO code at $2000-$3FFF on the 16K image must reside at absolute address $6000-$7FFF on the 27256.

I just verified the file I posted is correct. This is a 16K ROM image, intended to go on a 27128. Only the top 8K is used in the MIO.

Nope. Nor would I trade it for a Corvus or your ICD setup.

Hi Mathy, my response was intended to be more tongue-in-cheek. But for you, $100.

I do! In my closet. I have a working Axlon Rampower 128K as well as a 32K Ram-cram.

That doesn't sound right. I need to check the file I uploaded. I'm not at my computer right now, but the code space needs to be in the upper half. In the meantime, you should be able to manipulate the image in your programmer software to do this.