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Type: Posts; User: Stuart

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  1. Replies
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    Several years ago I wrote a manual on how to use...

    Several years ago I wrote a manual on how to use Dave's WinCortex emulator and the PC<->Cortex transfer utilities. To make a boot floppy and to transfer disk images from the PC to the Cortex, see...
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    Gosh, a new message! What Dave said. Plus...

    Gosh, a new message!

    What Dave said.

    Plus for a VGA style connector, the F18A video board can be used with the Cortex...
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    Hi Doug, Do you also go by the name of Thomas,...

    Hi Doug,

    Do you also go by the name of Thomas, who sent me an e-mail on exactly the same subject? Or has the unseasonably warm weather got two old Cortex owners to drag their machines out of their...
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    Mini-Cortex PCB - send me a PM.

    Mini-Cortex PCB - send me a PM.
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    I think you might have just made someone very...

    I think you might have just made someone very happy ... you should have a PM from a friend of mine. ;-)

    Stuart.
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    Hi, Are you Boston in Lincolnshire, or Boston...

    Hi,

    Are you Boston in Lincolnshire, or Boston in the US?

    Stuart.
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    I don't think it is running on a Powertran Cortex...

    I don't think it is running on a Powertran Cortex at the moment - but on Paul's Mini-Cortex design. This has some extra hardware - memory protection and CF Card interface - that is used by the Unix...
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    If there was a "Like" button on this forum, I...

    If there was a "Like" button on this forum, I would click it. ;-) Good work Erik!
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    Yes please to some pictures, and progress reports...

    Yes please to some pictures, and progress reports as time allows. ;-)

    You're in the UK somewhere?
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    SMD design - ouch! Personally I'd advise...

    SMD design - ouch! Personally I'd advise through-hole design where possible. Many TI'ers are now of a certain age where hands and eyes are not as good as they once were, and it's likely to put some...
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    Paul, Didn't we conclude that there was a...

    Paul,

    Didn't we conclude that there was a problem using the 74LS612 mapper chip, and it needs to be the HCT version?

    Stuart.
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    ExpressPCB - I use it as well. It doesn't have a...

    ExpressPCB - I use it as well. It doesn't have a maximum board size like most of the other free programs seem to have. But it saves in a proprietary format so that you have to have the board made by...
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    Any idea how the TI990 minis compare speedwise...

    Any idea how the TI990 minis compare speedwise with the 9995 with no wait states?
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    Or one of the first two listed here? ...

    Or one of the first two listed here?

    http://www.avjd51.dsl.pipex.com/tms99110_breadboard/tms99110_breadboard.htm#references
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    Hi Dexter. I haven't yet (personally) seen any...

    Hi Dexter. I haven't yet (personally) seen any genuine (I think) TMS99xx chips without (1) a clear 4-digit date code for the 80's or 90's and (2) a correct part number. So those you have would seem a...
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    Would we be able to load disk Basic at >0000 so...

    Would we be able to load disk Basic at >0000 so we can set/use the interrupt vectors?
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    A clever hack for the original design and...

    A clever hack for the original design and hardware I think. I believe it also switches the ROMs back on when you use the command that resets the character set - copies the original character data...
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    Yep. Address >3FFE contains >20F6, and is a...

    Yep. Address >3FFE contains >20F6, and is a pointer to the code for the ENTER statement. Let me know if you want a copy - I'll have to e-mail it as it's too big to upload as an attachment.


    1814 ...
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    I've got an 'assembler output listing' if that is...

    I've got an 'assembler output listing' if that is any good - so has a column showing the resolved addresses, like:


    463 0000 00B6 CLKI EQU $
    464 00B6 020C LI R12,>1EE0 ...
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    Lez - the TMS9909 FDC you're including in some of...

    Lez - the TMS9909 FDC you're including in some of the eBay kits. A couple of us have bought these before from Chinese suppliers and they haven't worked. Have you got a spare you can pop in the post...
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    If you enjoy playing/designing/tinkering with the...

    If you enjoy playing/designing/tinkering with the hardware, then reducing everything down to just one or two big, fast chips is often not the object of the exercise. Personally, I like a board to...
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    Hi Ermanno. You want to be able to list a BASIC...

    Hi Ermanno. You want to be able to list a BASIC program to a text file on the PC? It's possible using the serial terminal feature of the emulator, but takes a couple of steps:

    (1) Load the program...
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    Ksarul put me onto www.sitopway.com, who I've...

    Ksarul put me onto www.sitopway.com, who I've used three times now, and couldn't be happier. Have ordered the boards with green soldermask and white silkscreen. Turnaround is 5 days. No minimum...
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    If it were mine, I'd use the flip-flop for LREX...

    If it were mine, I'd use the flip-flop for LREX single stepping. The mapper controlled through the CRU latch. As you said before, there is no existing software that uses the mapper.
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    Ah, LREX does need a flip-flop by the looks of...

    Ah, LREX does need a flip-flop by the looks of things. So we're a flip-flop short. If you used it for LREX, then the code for the single-step is just a simple LREX rather than the (6?) or so lines of...
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