| --- Log opened Sat Feb 06 00:00:26 2021 |
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| 06:26 | | * McMartin grumbles |
| 06:26 | <&McMartin> | I don't want to port this dumb code |
| 06:26 | <&McMartin> | I want to have already ported it |
| 06:26 | <&McMartin> | Alas |
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| 10:23 | | * McMartin finishes half of phase 1 of the port, gets good results out. |
| 10:23 | <&McMartin> | After getting whomped by a buffer overflow along the way. |
| 10:23 | <&McMartin> | It's been awhile since I've been able to inflict one of those on myself in a way that matters! |
| 10:23 | <&McMartin> | At least in 8-bit stuff. |
| 10:27 | <&McMartin> | 364 bytes! |
| 10:30 | <&McMartin> | ... and 235 lines of code. |
| 10:32 | <~Vorntastic> | What are you porting |
| 10:33 | <&McMartin> | The Simulated Evolution program that I ported from BASIC to modern machines last year, and then demade to C64 later that year |
| 10:33 | <&McMartin> | And now I'm porting the C64 version to the Atari 800 |
| 10:34 | <&McMartin> | This is not really minimal viable product once it's done because four of the lines of pixels won't fit on the screen, so I'll need to implement a scrollable window over the arena |
| 10:34 | <&McMartin> | Fortunately the Atari makes that really, really easy |
| 10:35 | <&McMartin> | What I have right now is a complete bitmap library that lets me draw dots and rectangles in four colors and has the potential to let me do the scrolling-window stuff later |
| 10:35 | <&McMartin> | But yeah, where the C64 requires your bitmap display to exist at some multiple of 8KB |
| 10:36 | <&McMartin> | The Atari screen lets you assign screen memory to arbitrary locations and even change it every data row if you want, without getting out of its normal operation modes |
| 10:36 | <&McMartin> | So I can scroll one pixel just by moving the start of bitmap memory by 40 bytes |
| 10:36 | <&McMartin> | There are sharp limits on how much you get *for free*, in addition to "normal operation mode" |
| 10:36 | <&McMartin> | But! It turns out my needs are well within the "for free" range so life will be good |
| 10:38 | <&McMartin> | If you missed https://bumbershootsoft.wordpress.com/2021/02/01/atari-800-a-custom-graphics-display/ it sets the groundwork |
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| 19:41 | <&McMartin> | Success! |
| 19:41 | <&McMartin> | I'm not *done* |
| 19:41 | <&McMartin> | But the base port works. |
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| --- Log closed Sun Feb 07 00:00:28 2021 |