开云体育

testing z80s.... Unplug the built in one and plug in the one in question if it boots and does all the usual stuff its a good Z80. Over the years the only Z80s I've seen that were bad were either

Hi Lee, I am loving the Z80MC (thank you!), although so much to learn that is fine. Here are some suggestions for consideration (without altering the original art) : 1- Going back to 15K from 18K to

Yes, those days are now really old...? ;) I have a assortment of machines all speaking either CP/M or NS*DOS. NS*DOS was a strange animal as it was basically bag and tag and tightly bound to their

Allison, Ah yes, the "good" old days. :-) My first disk system was a Heath H89 with a single H17 floppy. 40-track, hard-sectored, single-sided, single density, which stored 92k with CP/M. Operating

Remap... Lets say drive B is a 8mb container file on some disk. Elsewhere there are 124 more of them (1GB media). My box can make any of those 124 others appear as drive B: same for C: and

Lee, My first system with disk was Altair box NS* disk and 48K ram and that was 1977.? FYI the NS disk was Sa400 35 tracks, 10 hard sectors and the boot disk has about 81K of usable space. Since the

I don't understand "remap"?

Josh, You still? need a ap on your PC to read the CP/M directory in the container file. so going direct is one step less.? If the one available works great. Fat with the container file fragmented

Hi, Using FAT16 as the underlaying model isn't as wasteful as you might think. When booting up, the BIOS looks at the main boot partition (Sector 0) to see where the FAT16 Partition starts.This

I'm out of Z80MC CPU and Front Panel cards, and need to order more. Do you have any suggestions for changes or improvements? Hacky Lee -- Excellence does not require perfection. -- Henry James But it

makes sense since you'd probably otherwise need a special app on the PC side to read/write into the raw block store.

no urgency on any of that, of course; I happen to enjoy reading code. yes, coincidentally I've seen your posts on QRPLabs; lol.

Josh Bensadon originally wrote the Z80MC's CP/M code for his JAIR board. It's a single-board S-100 computer with an 8080 CPU, 64k RAM, boot ROM, 2 serial, 3 parallel ports, and a parallel interface to

Dave, Code for direct sector access is currently only for CF (and IDE).? Since only two of my machines are uSD I haven't gotten to it but the basic skeleton would based off the CF versions with the

Generally its better. Since the SPI interface is bit banged having to shuffle less means less time doing bit bang to move stuff.? Think in terms of layers. Code may be smaller as well, less code

That's super interesting. ?I wonder what the numbers are on the Z80MC for the elimination of the FAT layer relative to direct block I/O. ?I would guess that a majority of the time is spent in the

Unless the system has a real floppy I do not bother with smaller disk formats. When you use CP/M larger disks makes life easier as anything under 500K can get cramped fast or force spreading out

Thats it!? That dang DLL, easy to find and install. Myself I do large devices and I don't do from container files in Fat file systems. My approach is format the uSD or CF as fat.? Then use

It is a VB6 application; perhaps MSVBVM60.dll (and any dependencies) are not available in a WINE environment? It does run for me on a native Win11 box, but in my case I wound up using 'cpmtools',

VCF-East in New Jersey... I wanted to but, it would have been 600 miles round trip and I'd not be able to stay over night.? Maybe next time. Last time I was down there was about 1980 when it