- Jun 1, 2011I just tried it with FireFox 4.X running on Windows 7.
On 31/05/2011 10:23 PM, whd_whd_whd wrote:
> originally written by Maciej Szyc in 2005. He published it as GNU GPL
> 2+. I've e-mail corresponded with him and he is supportive of my efforts.
> Over the last week or so, on and off, I have enhanced it quite a bit
> to make it "better" and more usable and user-friendly. I've also
> corrected some severe bugs I found. (which effectively made it
> unusable -- Maciej wrote it and never tested or debugged it) I'll list
> below what I've done and intend to do, from the internal
> documentation, and more that is not mentioned.
> It's still not done, but getting there, and is a lot better than the
> original. (in a sense) Basically, I consider it more or less usable
> right now, in the sense that it is more than a COSMAC Elf "black box"
> with only switches and a two-digit hex display and a Q LED. It's a bit
> slow (mostly with the display/LED updates), but not too bad. It's more
> or less usable. Especially as an easy-to-use and user-friendly
> intro/trainer. (and just fun to play with if you're into that sort of
> So I decided to show it to you as an unfinished "rough draft". Let me
> know what you think if you get a chance to look at it. It might take
> me a few more weeks+ or so to finish it off the way I envision it,
> depending on how much I work on it. (although I have a feeling that
> this is going to be a LONG TERM project) Remember that not all of the
> features and functionality are supported at this point, some of which
> are evident and present but non-functioning.
> I'm kind of calling it the COSMAC Elf^2. (squared) [working title]
> (I like to run it locally as a file:// program, so that format is
> supported, and will be additionally supported as a ZIP archive download)
> NOTE: It currently works in Firefox 3.x and Opera, and Google Chrome I
> think, but not IE (9). I may or may not support IE.
> There is no HELP right now, so the quick-use description is as follows:
> AFAIK, the basic unit works like the original hardware COSMAC Elf did,
> the way the switches are used to enter and run programs. As anyone who
> has used the switches to enter programs knows, that can quickly become
> tedious and tiresome. Plus the limited I/O available. So I have added
> some features and functionality to make it easier and funner to use.
> More will be added later to extend it quite a bit.
> DOUBLE-click on the 7-segment LED's image(s) to enter "Hex Keypad
> Entry Mode". There are a few modes that sequence through the
> double-click selections. The first is just a quick auto-enter with one
> byte per two-digit hex entry. The other two modes require an ENTER
> and/or SPACE key to enter and move on. ESC or taking it out of Load
> Mode with the toggle switch takes you out of hex entry mode. It is
> also temporarily out of hex entry mode when the Memory Dump and
> Program Load "window" is activated. This makes it MUCH easier to enter
> The Memory Dump and Program Load "window" is activated by clicking on
> either of the memory IC chips at the top. This "pops up" a "window"
> (hidden and unhidden HTML div). This offers some additional program
> entry options, as well as Memory Hex Dump, DisAssembly, and Program
> Load from hex text and built-in programs. It's fairly understandable
> without too much explanation, I think. The two check boxes don't work
> yet. I have to decide which formats of hex dump entry I want to
> support. But it does support "starting address specification" and
> "line addresses" with a default to 0000. You can see how the
> "built-in" programs to load are specified in 1802programs.js, which
> I've added several programs to.
> Right now it has 1K RAM instead of 256 bytes. This can be changed if
> desired. And I probably will offer various selectable sizes up to
> maybe 64K. I also might support a form of ROM memory.
> Changes and to be changed:
> * Brightened switches and "7-segment" LED images (also made OFF and
> green LED versions)
> * Added "COSMAC ELF" 'logo' text (image -- click for "About...")
> ** cosmacelf.html, simelf.js, 1802cpu.js; created 1802programs.js;
> added 1802disasm.js
> ** Prefixed and renamed variable names
> ** Formatted code (whitespace, etc.)
> ** Changed from HTML Tables to Divs and changed FONT tags to SPAN
> ** Fixed several bugs and added speed enhancers
> * Added memory dump and load form functionality and access via CDP1802
> chip click (oops, memory chips click -- will correct)
> * Added mnemonic list functionality (DisAssembly)
> * (future) Added debugger window w/single step, breakpoint, etc.
> * (future) Offered ZIP archive so user can install and use it locally
> * (future) Added "check for more recent update version" functionality
> I also intend to add:
> * Enhanced emulator interface that displays internals and more I/O and
> switch options. (instead of the COSMAC Elf interface -- kind of an
> enhanced "front panel" a la the good old days of blinking LED's)
> * CDP1861/64 graphics chip output support.
> * A terminal emulator for output and keyboard input. (VT-100?)
> * Possibly saving and loading programs from disk. (when used locally)
> * An assembler and "machine language" entry.
> * Other fun stuff.
> - Bill
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