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I have improved my inverse text routine. The routine is now faster at printing characters to the screen, and has a much faster screen scroll. It also has a new CHR$(12) feature (Inverse CLS) added for use in future games. Here are some test results using the previously mentioned QWERTY speed test un...

I have updated my customised version of the game with the new code. Its noticeably quicker now when the game is running on a CoCo 2.

I just remembered that reading the keyboard by peeking the keyboard rollover table won't work properly on CoCo 2's without adding extra lines to constantly call the INKEY$ function in the same loop. I have discovered that using EXEC to call the keyboard routine directly is much faster than using A$...

jgerrie wrote:Dear Zephyr,
Added references here:
http://www3.ns.sympatico.ca/jimgerrie/jsoft.html
http://www3.ns.sympatico.ca/jimgerrie/jgames.html

Thanks, Jim. I'm happy with that.

Zephyr, I've integrated some of your routines into a new version of my own. It has some of the existing quirks, but it has the speed my son and I like. The keyboard controls don't work properly when the game is running on a CoCo2. You will need to add the extra A$=INKEY$ to prevent the problem of t...

I just remembered that reading the keyboard by peeking the keyboard rollover table won't work properly on CoCo 2's without adding extra lines to constantly call the INKEY$ function in the same loop. The attached update fixes that problem by the addition of two extra lines (A$=INKEY$) to the code. I ...

Thanks, Jim. :) I liked the reverse screen of the MC-10 version so much that I quickly extended my original machine code routine to add the same feature to the CoCo/Dragon version. The new routine is compatible with CoCo 1, 2 (Minimum 16K of RAM and Extended Color BASIC are required), 3, and Dragon ...

I would like to try your MC-10 version (the one which uses machine code to reverse the screen). Where can I download it?

You say you added more starting fuel, which made me wonder whether you were aware that you can get more fuel by running into the space stations and Os. Yes, I saw your demo of the MC10 version of the game on YouTube. I'll have to take a look at your machine language routine for SCREEN 0. Does it sp...

I did my own customised version of this game. Here is a list of the changes: (1) Ship launches with more fuel (2) Ship speed does not change when firing weapons (3) Firing continues when moving left or right (4) The down arrow key increases ship speed (Engages Hyper-Drive) (5) Modified the double sp...