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It's OK, it sounded great when I played it. There used to be a central point for obtaining new creator codes and file types (APDA), but these days I think people just make them up using a combination of lower and upper case letters (or symbols). We could call the file type 'MOD4' and app...

This would cause the pitch to be 0.02% too low I think, but that's OK IMHO. Yes, there's essentially 4 levels to all sample playback sequencers: Sample buffer to hardware copying (which might be DMA, but it's the beginning of the VBL routine in this case). This is the most hard, real-time...

I thought I'd add another comment. It might feel like you've done something great and now people are criticising you, but in reality it's just that you've done something great, so people are interested and want to contribute.

Hi MIST, I think you've misunderstood. You won't have delayed the buffer update, you're just allowing more latency (e.g. if your VBL routine is slightly delayed by something in the system). What you do currently is: /* copy from audio buffer to hardware */ move.l #0x3ffd00, %a0...

OK, so I've just been looking at your VBL routine. Excellent use of movep, I wouldn't have thought of that, but it's great for writing into every other byte. I still think a few improvements can be made, which would improve performance and avoid glitches. I guess you know that it's best to...

I looked at the CODE resources, very handily named! I guess the 4.4K "RunTime" resource actually plays the music and the 400kB "main" code resource contains all the MOD data? I played it on miniVMac, at 1x performance. I thought the Atari ST font was very humorous! Just wondering what kind of...

A Mac Plus has a 60W power supply. Mac SE is up to 100W. Mac Classic 76W. So, I would guess that a Plus or Classic could be powered on a train.

@cheesestraws, I've just thought.. lots of British trains have mains sockets. If they had enough power, you'd literally be able to use a compact Mac on a train - how hilarious!

LOL!

Gosh, hadn't heard that before... hang on, you have data.. OK. I knew it needed a much higher clock. Generally I go with "Computer Architecture, A Quantitive Approach". Their central premise is that it's the whole system that matters, so there are always trade-offs between clock speeds...

Sinclair did most things with a couple of resistors and diodes. 8-bit bus helped, though I think they used a 68008 because they could get them very cheaply. Sinclair also a pioneered ASICs (Farranti ULAs - more like a sea of gates where you specify a metal layer to connect them all). The ZX81...

Good observations. Mind you, the £400, 1984 Sinclair QL got by with very few chips: Apart from the CPU, ROMs and 16xRAM, I think I count 12 others (11 more than a ZX Spectrum). Of course, it's only a 68008 and in many ways it's typical Sinclair kludgery, but it does support colour video (2...

Yes, because Apple nearly did use them for the real RISC successor to 68K Macs; had working prototypes and I think would have done if the Pink OS/ Taligent initiative had been cancelled before they'd forged an agreement with IBM. The M88K was an early Superscalar RISC with a proper scoreboard...

To preempt the rest of this. Gosh, you've made an incredibly informative response to my back-of-the-envelope+software-guy-ignorance post, so I'd just like to say thanks. Didn't think of that, but good point. Makes sense. I wanna backup a bit here. Is this an FPGA to manage a real MC88110, or...

I really did laugh out load on that one :ROFLMAO: ! The actual quote is: From: https://68kmla.org/bb/index.php?threads/bench-test-of-performa-6214cd-internal-ide-hard-disk.45873/page-2#post-509662 Maybe I should buy a P630 at some point, Mac OS 8.0 is even more lazy on that (I had one...

LOL, that is quite funny. I'd say the worst Mac I ever owned was a toss-up between my PB5300/100 or Duo 230 (both black and white). Both had awful screens, but the D230 had a frustrating mini trackball that I'd always be having to clean out after getting clogged up, and I only had a full-sized...

I did manage to check it. My initial thought was that fdiv would only be used on SpecFP 92. From page 192: fdiv is used in SpecInt92 a bit, but as you say, fdivs isn't. Though both are used a decent amount in SpecFp. I guess your point is that Spec92 didn't test the interaction between integer...

Hey hey, a magnanimous reply! MegaMacs it is, outside the US!

Can we call it a MegaDrive Mac in the rest of the world ;) ? (it was only the Sega Genesis in the US). https://en.wikipedia.org/wiki/Sega_Genesis Ironically, despite it only being called "Genesis" on 5% of the planet, the Wikipedia entry, for some reason doesn't list it as a MegaDrive :unsure: .

Mac 128K support is certainly a hallmark of TT, marking it out above other 68K-PPC apps. Thanks. My Keyspan is also fairly interesting, because it's based around a TI TUSB3410: an actual programmable 8052 CPU that happens to be dedicated to serial. And it has DMA, because a 2 MIPS, 8052 is...