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flashjazzcat

Member Since 23 Nov 2008
ONLINE Last Active Today, 10:56 PM

Topics I've Started

1088XEL U1MB Firmware Released

Wed Jul 4, 2018 3:39 PM

I'm pleased to announce the release of the finalised U1MB firmware for the Atari 1088XEL, which may be downloaded from the 1088XEL firmware page:

 

https://atari8.co.uk/firmware/1088xel/

 

The page will be populated with additional material in the coming days, including links to Michael's project site, etc. Please use this thread to discuss any operational or installation issues.

 

Meanwhile, the U1MB firmware update of which the 1088XEL firmware is a derivative will be coming next, along with the Incognito firmware update and updated loaders for SIDE/SIDE2.

 


XEGS ROM Geometry

Thu Apr 5, 2018 8:26 AM

I've just fixed an XEGS with a bad ROM and MMU, and have got it going temporarily by flashing four copies of the XEGS OS to a 27C128. Naturally it boots straight to the Self-Test, since there's no BASIC or Missile Command. I can't seem to find out what the ROM layout is supposed to be, however, on a 32K chip (i.e., is it BASIC, Missile Command, OS ROM, or OS ROM, Missile Command, BASIC?). Needless to say I've also been unable to locate a complete 32K dump of the XEGS ROM, otherwise I wouldn't be asking how to manually assemble one. :)

 


"HardDrive" Images

Fri Mar 16, 2018 5:24 AM

Minor issues: another user just pointed out to me that a 2,880 sector DD ATR is identified by RespeQt as a "HardDrive" [sic] image. This is a common floppy image size used - for instance - by XF551s with 720K 3.5" mechanisms. I assume the fact that "HardDisk" and "HardDrive" are written as single words is some carry over from prior versions. I also noticed 360K DD ATRs are labelled as "QD Diskettes". Perhaps QD shorthand for DS/DD (although I can find no mention of this terminology elsewhere), but quad-density (512bps) ATRs are verbosely labelled "512 bytes per sector".


Thumbs for YouTube videos with time offset?

Mon Nov 6, 2017 3:59 AM

Tried to post a YouTube video with a time offset (to skip bad audio) but the extra info in the URL seems to suppress the thumbnail. Not a big deal - just throwing it out there. ;)

Spare a spring?

Tue Oct 31, 2017 12:54 PM

I wondered if anyone might be able to help me replace a missing spring on a Mitsumi 800XL keyboard? The keyboard is "Type 5" in the 600/800XL Keyboard Variants thread, and I rather like it. Unfortunately efforts to fabricate a replacement spring for the Break key have been unsuccessful. Here's a photo of the required spring:

Attached File  DSCF6930.JPG   436.08KB   25 downloads

Frustratingly, I had a cannibalised example of this keyboard many years ago but rather foolishly threw it away, and later did the same thing with the five console key springs I had kept. If anyone has such a spring spare and doesn't mind parting with it (for a nominal fee, covering postage, etc), a PM would be most welcome!

Thanks in advance.