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  1. Replies
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    That's very kind of you Stuart! Been meaning to...

    That's very kind of you Stuart! Been meaning to do that for years...

    I'll have to put Version 2.1 up which is needed for NOS. I'll try and give the manual a read and see if there is anything you...
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    Hi Dawn, Glad to hear another Cortex is out...

    Hi Dawn,

    Glad to hear another Cortex is out there alive and well. Take a look through this thread to find out some interesting history on the Cortex along with hopefully some answers to your...
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    This TI Designers Handbook has a TMS99000 section...

    This TI Designers Handbook has a TMS99000 section in it:

    http://www.quantums.info/cortex/TI%20Microsystems%20Designers%20Handbook%202nd%20edition.pdf

    Hopefully it's what you were thinking of?
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    You are correct, it doesn't work! However it is...

    You are correct, it doesn't work! However it is fixed in CDOS 1.20. It's transparent because the *PROG command appears to simply load the program "PROG" from Drive 0. However, prior to doing the...
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    RESET is a true cold start reset. Same as...

    RESET is a true cold start reset. Same as turning the computer on. However, with the memory mod that enables >F200 - >FFF9, this area is preserved because Cortex Basic doesn't initialise it.
    ...
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    Originally the Cortex had everything from >F000...

    Originally the Cortex had everything from >F000 as memory mapped I/O (obviously the TMS9995 internal RAM took precedence). There was a modification to change this so that >F200+ became local RAM. ...
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    From what I can tell, the software is the same as...

    From what I can tell, the software is the same as MDEX (programming languages, word processor etc.). What it brings is the feel of a true operating system. Cortex Basic + CDOS is great but it...
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    That's great news. As for the mapper, you're...

    That's great news. As for the mapper, you're going to need that to run NOS. It's somewhat flexible, but essentially it needs 128K as a minimum. NOS ends around 0xEFFF and builds downwards to...
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    If you take a look at text.asm and error.asm, the...

    If you take a look at text.asm and error.asm, the area used by the start-up code and error messages is actually used as a scratch buffer once the system is up and running. When processing an error,...
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    Good to hear from you Paul! I have one unread...

    Good to hear from you Paul!

    I have one unread email in my gmail inbox. It's from you in April concerning the c compiler port for the Cortex. It's been one of those years and not sure it's easing...
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    Yep, looks like it's all there. Some nice person...

    Yep, looks like it's all there. Some nice person even wrote a README to describe how to build it for different terminals ;)

    Dave.
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    I have the original WINDOW code somewhere. As...

    I have the original WINDOW code somewhere. As you say, it was setup to work with a VT100. I will try to dig it out...

    Dave.
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    That's great progress Paul! As for lower memory,...

    That's great progress Paul! As for lower memory, I'm pretty certain MDEX loads most of its programs at 0x0100 (DIR is part of SHELL$.OBJ) so without RAM there, that could be a problem!

    I'd have...
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    It's a good idea. I'll have a think about it. ...

    It's a good idea. I'll have a think about it. Single address or range with Read/Write qualifiers and the same for the CRU. Sounds good?
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    Hi Paul, I have to confess I'm not really...

    Hi Paul,

    I have to confess I'm not really sure. Looking at the driver source and memory dumps of MDEX using debug, unit table ut$fd1 runs from dtmstr to dtrvrtrv + 16 bytes and ut$fd2 runs from...
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    Attached is the main chunk of code for the MDEX...

    Attached is the main chunk of code for the MDEX Disk Utility. The BlockToOffset function is what converts MDEX Block Number to a linear disk address.

    Dave.
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    Interesting! I always thought the flashit*...

    Interesting! I always thought the flashit* routine got called once at the end of the MDEX boot. But, you're right - it's not part of MDEX. So I did a little digging and it's actually part of the...
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    Hi Paul, I was in the process of answering...

    Hi Paul,

    I was in the process of answering your questions when I noticed you'd beat me to it!

    flashit just flashes the front panel LED when MDEX has finished loading. As you say, probably...
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    Hi Paul, I still haven't tested the...

    Hi Paul,

    I still haven't tested the cc99/Cortex mods you did for me. Sorry! (It's on the list).

    I'm pretty familiar with MDEX, so any help you need please ask. You have probably already read...
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    I did wonder if I was setting myself up... Nicely...

    I did wonder if I was setting myself up... Nicely done!
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    Hi Stuart, I loaded the program on the...

    Hi Stuart,

    I loaded the program on the emulator and it runs until you press a key, upon which it aborts with "Error:Fail Lo Pro 2014" in red. I tried it on the Cortex and it does the same...
    ...
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    Hi Stuart, A manual for the emulator is long...

    Hi Stuart,

    A manual for the emulator is long overdue. I started to write one last October but haven't got back to it yet... I need someone who excels at writing technical manuals ;)

    Here are...
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    Assembler guide is very helpful. Thanks for...

    Assembler guide is very helpful. Thanks for that.

    As I'm back to work for the next few days, time is limited so I think I'm happy to just back and let the 'dust settle' with the current phase of...
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    Email sent regarding my mods to the tool-chain. ...

    Email sent regarding my mods to the tool-chain.

    No big deal if .if isn't added back in to 'as' but some kinda cheat-sheet could come in handy as it's significantly different to the TI standard...
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    Hi Paul, I ran this on Cygwin and it works...

    Hi Paul,

    I ran this on Cygwin and it works great. Firstly I built it in a local directory and it reported that correctly. Then I moved it to /usr/local/bin (which of course there is a PATH to)...
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