Sundry Sunday is our weekly feature of fun gaming culture finds and videos, from across the years and even decades.
Just a few days ago I linked to the complete two-season run of the CG Donkey Kong Country cartoon that got made and aired on Saturday mornings. Well, there’s more where that came from.
As it turns out the people who animated it, “Medialab,” had other plans for the character. It’s not very well known, but in France they made another show, a general cartoon anthology, with the characters performing in bumpers between them, like the original version of Cartoon Planet. It was originally called Donkey Kong Planet, and it’s both bizarre and entirely in French.
Then, the model who was the co-star, along with the DKC characters, left the show. They rebranded it to DKTV, and, um.
You have a choice. You can start off with this 10-minute explainer video by Carlito. It’s the standard Youtuber, “can you BELIEVE this happened??” video. It’s not really bad, I’ve definitely seen worse, but it’s not really a sterling example of the genre either. Here it is embedded:
Or, if you’re a jaded connoisseur of bizarre video like I am, you might want to just go ahead and jump into the deep end of the pool, unprepared. If you’re like that, I got you covered. This is what you want (41 minutes). Don’t say you weren’t warned.
Is that hyperbolic? It probably is. But the heart wants what it wants, and what mine wants is CP/M for the MOS 6502 processor. Set Side B is a blog about computer entertainment, in all its many forms, and this qualifies in my mind, because it’s not like anyone’s going to be using it do real work. Right?
I found out about it through the (mostly) wonderful blog The Oasis BBS. It’s called CP/M 65, and it was made possible when CP/M’s source was opened in 2022. Wait, maybe I should explain what CP/M is. Sure, it has a Wikipedia page, but I like explaining it.
Output of the DIR command on the C64 with the system disk in the drive.
Gary Kildall created CP/M, “Control Program for Microcomputers,” for the Z80 microprocessor, and it became the first widely-used standard OS for home computing. Its importance and influence cannot possibly be overstated: PC-DOS (later known as MS-DOS) was created as a clone of CP/M for the 8086 processor, meaning, the reason .COM files are still technically considered executables, and why we still have drive letters in Windows 11, are both directly because of CP/M.
A case could be made that, if IBM hadn’t made the IBM PC out of standard parts, making possible the huge market for clone machines, it’d still be a CP/M world today, in some way. It was the first standard OS, one where it ran on machines made by more than one manufacturer. Many of the CP/M machines companies, the Kaypros and Osbournes, are gone now, but they had quite a large niche at one time.
Conway’s Game of Life, for CP/M 65. Because it’s not really a computer until someone’s run Life on it.
Commodore released a CP/M cartridge for the Commdore 64, an amazingly ridiculous and rare package because the C64 used a 6502 processor. The cartridge worked only because it contained a Z80 processor inside itself, and put the 6502 in the system to sleep to do work. It ran much more slowly than other CP/M systems, and on top of that it still had to use Commodore’s 1541 disk drive, a fatal flaw, because it meant that while it could run CP/M software, it couldn’t read the disks that had them, because CP/M’s native disk format couldn’t be read by the 1541’s read heads. (The C128 had a built-in Z80, and the 1571 disk drive that was made for it could read CP/M disks natively, but by that time CP/M was already dying, pushed out by the PC standard and all those clones I mentioned.)
This thing I’m posting about, CP/M 65, has no relationship to that woeful product. It’s a port of CP/M to the 6502 processor. It can’t run Z80 CP/M software. But in all other senses, it is CP/M. What that means is that it has its own BIOS.
CP/M’s BIOS is what allowed its software to run machines made by different manufacturers. The BIOS acted as a translation layer between the hardware and the software. Programs wouldn’t interact with the hardware directly, but instead make calls through the BIOS whenever they needed to use some part of the hardware, like when it needed to access the disk or output characters to the screen. The result was that unless the software was written specifically to take advantage of a computer’s specialized hardware anything extra it had would go unused, but it also meant that a software developer could write one program and, so long as it restricted itself to interacting with the system through that BIOS, it could run on any CP/M machine that could read the disk.
DIR is the built-in CP/M command to report disk contents, but this release contains LS for those with that muscle memory.
CP/M 65 provides such a BIOS for all of its supported platforms, and as a result, while using it will give you a plane-jane, character-mode program, it’ll let you write a program that will run on any of them. Indeed, since this version of CP/M supports relocating executables, its programs can run on a much wider variety of hardware than original CP/M could. You can write a single program that can run on a Commodore 64, VIC-20, BBC Micro, Atari 8-bit, Apple II, KIM-1(!) and, if you can find the incredibly obscure keyboard and disk drive hardware for it or else emulate them, the Super Nintendo Entertainment System(!!).
But on a C64 it shines slightly more than the others, because it has integrated fastload routines, meaning that it gets around the C64’s greatest flaw, its horribly slow disk drive.
So this basically means now 6502s have their own cross-platform version of DOS, or something a lot like it. It has little software, but it does have an assembler, and a version of BASIC, and if you don’t mind writing it on a (pah!) modern computer, you can also write programs for it in other languages.
Behold the PETSCII Mandelbrot set!
If you want to try this wonderfully misbegotten thing, something like Frankenstein’s Monster wearing a ribbon, its GitHub is here, and you can find binary release disk images here. The one with the extension .d64 is the C64 version, and it loads right up in the Commodore computer emulator VICE, although I found out it’ll fail to boot unless you turn on “True Disk Emulation” for Drive 8. But it works! It comes with an assembler and BASIC, and a vi-like text editor, an implementation of Conway’s Life, and even a Mandelbrot set plotter. I kind of want to write software for it!
CORRECTION: Silly me, here I was assuming that CP/M 65 itself was a fairly recent thing, but as it turns out it’s been around for around 30 years!
CORRECTION FOR THE CORRECTION: Well the guy working in this very long Youtube playlist (maybe 31 hours?) created it in 2022, which isn’t 30 years ago. Ah well!
Each week, the indie showcases highlight the many games we play on the stream here (at Game Wisdom). All games shown are either demos, press keys, or from my (Josh Bycer’s) own collection.
Owner of Game Wisdom with more than a decade of experience writing and talking about game design and the industry. I’m also the author of the “Game Design Deep Dive” series and “20 Essential Games to Study”
It is. It IS. It is not recommended, for hearing, for knowing about, for existing.
Two playlists, one for each season. Yes, they made a second season. So many characters are off model (literally, their models are off), but Cranky Kong’s is especially different.
Mario Kart World upends the series in several ways (not the least of which in price), but the biggest change is that the game now takes place in an open world, one that you can roam around freely, and even the main tracks in the Grand Prix are supplemented by races that travel between them.
One consequence of the game world is that the NPCs that inhabit it have a bit more of a life than in past games. In N64 Toad’s Turnpike, they’re just boxes that travel around the loop getting in the racers’ way. But now, when you’re exploring in Free Roam, you can pick out a specific driver and follow them around.
And what do you know, there actually seems to be a bit of an inner life going on there! They don’t seem to pathfind between locations, sadly, but they can get the mad yen to drive off the road and tear across the desert. And, surprisingly, a drive can get out of their car, which is more than the player racers in the game can do!
OnADock, on Youtube, made a 14 minute video where he followed a Toad around on their travels through the Mario Kart World, um, world. Maybe it’ll inspire you to do some investigation of your own?
Loadstar was a disk magazine for the Commodore 64 that lasted for 22 years! I’ve been put in charge of organizing its archives. From time to time I’ll present something interesting from its thousands of published items.
Even though I’ve been spending a lot of time working on the Loadstar project, I’m trying not to overwhelm this blog with items related to this Commodore 64 disk magazine. So for the time being I’m restricting myself to weekly Loadstar posts at most. Maybe on Wednesday? How would “Loadstar Lendsday” be as a name? Hm, not great. I’ll work on it.
This week I bring you one of the most polished games Loadstar published, Zorphon by Nick Peck, from issue 39. Here’s some demonstration video I recorded and posted to Youtube (13 minutes):
While he did have a few miscellaneous other items published on its disks, Nick Peck only ever made two games for Loadstar. Both are great, technically impressive, programmed entirely in machine code, and challenging. (The other is Paragon, from Issue 50.)
Zorphon is a space shooter in the vein of Gorf, where each stage offers different gameplay. Zorphon has three stages that loop, although there is an extra one, “Genesis,” that plays before the first loop, that’s only encountered at the beginning of the game.
You have your standard-issue spaceship that’s locked to the bottom of the screen, that can only move left and right, like the ships in Space Invaders, Galaxian and Galaga. This poses special problems in the stage that plays like Centipede: if one of the purple space bugs makes it down to your ship’s level it’s done for, because it’s not possible then to shoot or dodge it at that point, so it’s essential to ensure that doesn’t happen.
I played this game long ago, when it had just appeared in the magazine’s September 1987 issue, and even though it’s a fairly simple game, its quality has stayed with me all these years. There are different ways to represent moving objects on the Commodore 64. The most obvious, and smoothest, way is using its hardware sprites, but there are only eight of them. You could use sprite multiplexing to reuse them as the raster beam traces down the screen, but that poses certain limitations on the graphics and gameplay.
Zorphon instead chooses a different means of representing enemies, it draws them on the character map. That means that the attacking aliens can only be displayed on character grid boundaries, which is a drawback, but it takes the cap off of the number of foes the C64’s VIC-II chip can display. You also get free collision detection: just check the register at memory location $D01E (53278) to see if the sprite that represents the player’s ship comes in contact with any background graphics data. This method means the collision detection is pixel perfect, the flag isn’t set if the sprite overlaps empty portions of a character cell. This isn’t always desirable, but the ship in Zorphon is large and chunky, so mis-detected collisions are unlikely.
Zorphon is, of course, in the archive of Loadstar Compleat that I maintain, although admittedly it is $15 there. You could also play it on the Internet Archive’s emulation of it. That is a “cracked” version though, which I find funny because Loadstar is for the most part not copy-protected. It will offer you unlimited lives, which is also funny since it’s a score attack game, and running out of lives is the only way for it to end. I think Loadstar #39 is also available there somewhere, but I can’t seem to find it easily.
If you decide to try it, by however means, here’s some tips.
All the stages of Zorphon are made more challenging by your ship’s limited firepower, having only one shot onscreen at a time. If you miss your shot you’ll have to wait until the other one exits the screen to try again, and that can take two or three whole seconds. Getting into a rhythm of shooting at monsters helps a lot, especially in the first stage, which is all about finding that rhythm.
The bouncing enemies phase of the first level, Genesis. Until you figure out how to clear all of them, you’ll be stuck cycling between Genesis’ two phases.
The first stage, Genesis, has two phases. The first end when you shoot enough of the red TIE-Fighter enemies, but to finish the second you must destroy all of the blue bouncing aliens within a limited number of passes. If you don’t get all of them in time, they’ll completely replenish, and if you fail at it again you’ll be sent back to the TIE-fighter phase!
The blue bouncing enemies are really hard to hit. I find it’s best to hang out at the left side of the screen and shoot the ones there. Every time they pass by, they distribute themselves again, and there will always be an enemy on the left side unless there’s only one left (which will move to the center of the screen).
Since Genesis cycles until you pass it, one way to get a good score is to purposely repeat it, letting the blue enemies reset and then fighting the TIE-fighter phase again. Once you know the patterns Genesis isn’t very hard, and can be easily farmed for points. It’s not a very exciting way to play though.
The Challenge stage, which is pretty hard!
The second stage, Challenge, will be the end for many players. It’s the Centipede-like stage, but your shots do nothing to the mushrooms! Many of the enemies wipe out mushrooms when they pass over them, which will help you out a lot.
To finish Challenge, you must wipe out two complete waves of centipede aliens, and a few pairs of segments that come in between them. After the second wave spawns, clear the stage of centipede segments and you’ll progress.
The third stage, Attack, is even harder!
The third stage, Attack, is really tough, and made harder by the fact that it’s so hard to get to it that you can’t practice it easily! Maybe getting better at it is a use for that infinite lives cheat on the Internet Archive version? Maybe! To finish it, I think you have to shoot enough of the bouncing asterisk enemies to pass it. Look out for the exploding bombs dropped by the flying saucers that come in from the side!
I don’t know remember if I’ve ever finished Attack and gotten to the last stage, but I seem to remember seeing a full loop at some point so I think I have. See if you can do it.
The weekly indie showcases highlight the many games we play here on the channel (Game Wisdom). Games shown are either press keys, demo builds, or from my (Josh Bycer’s) collection.
Owner of Game Wisdom with more than a decade of experience writing and talking about game design and the industry. I’m also the author of the “Game Design Deep Dive” series and “20 Essential Games to Study”
