It seems as though it's the PC having trouble creating a TRS80 disk. What if it was possible for a TRS80 to create a disk readable in a PC (DOS formatted...
An interesting idea. But what I'd like to do is be able to create TRS-80 formatted disks to boot from. I have TRSDOS 2.3 disk images I'd like to play with on...
It isn't. Almost all PCs use the same controller chip or they emulate it in silicon. AFAIK it can't write all 4 DAMs that a Model I can write. Also, many PCs...
Are you saying that in PC's, the BIOS does *not* support single density, or is it defeated by the way the FDC is wired in the circuit??? If it's just the BIOS,...
I believe it's the wiring. I imagine there's a connection they don't bother to use. Incidentally, FWIW, all R/S Coco disk controllers I am aware of can...
... I consider us lucky that it can be done at all. I have several machines that do write succesfully to TRS-80 disks and one that can even format but I'm...
... If you have a machine that's old enough to have ISA slots, there *is* a way. I have to dig mine out of storage and stick it into an old 486 system, but the...
... Thing is, unless you patch it, TRSDOS *requires* those DAMs that the PC can't generate. It's a *hardware* level incompatability. TRSDOS requires the floppy...
... I didn't think they could write Apple2 disks, only read them but I might be mistaking. Those CopyIIPC cards are hard to come by, I think. They were very...
The idea of transfering an image such as a DSK file to the TRS-80 and having it format and create a disk image from it is intriguing to me. Just from a matter...
... I would make it so it could use both RS-232 and the cassette port. The cassette port would be slow but RS-232 isn't that fast either on a model I...
... As others have mentioned, your data address marks are wrong due to the 1771's capabilities that PC controller do not have. The solution is to use a ...
Excellant! So I went and looked at the track read data in "Model I Disk Interfacing Guide" (William Barden), and you're right...it's not hard to translate it...
Well, in addition to the software solution that I'm about to undertake (transfering .DMK files to a TRS-80 and writing the disk image there), I certainly can't...
Ira's site has the utilities to read/write to cassette ports using PC wav files: http://www.trs-80.com/trs80-main-conversion.htm Last I checked, those files...
... I think that's the difference between the CopyIIPC option board and the *Deluxe* option board. ... I'm lucky. I picked up one of the boards at a swap meet...
Hi Some time ago my Model III sent out a smokesignal and yesterday I finally got around to repair it. (I have several Model I's and a Model 4 too so it wasn't...
... Hi Knut I had the same 'event' with my Model III last year. I replaced the caps (I recall there are two) with modern '275V Mains Suppression Caps'. ISTR...
The CatWeasel is a great investment if you read/write Model 1 TRS-80 disks (as single density is all but beyond the capabilities of current day IBM-PC). Tim...
... I have tried several types of filtering without any positive effect, it just muddles the signal and warps the timing (phase shift). And yes I know...
I recently aquired a Radio Shack 12MB hard drive. From my foggy memory I seem to remember that some sort of active cable is required to connect the hard drive...
... It uses a straight through 50 pin ribbon cable. I think the Model IV end is 50 pin card edge female. The hard drive end is a 50 pin femail header. I have a...
Thanks. That's fantastic. I'll go pick up some 50 pin card edge connectors. It probabily was the Model I that I was thinking used a special active cable...
Make sure the tape heads are nice and clean. Play the tape back and listen to it - see if slightly wiggling the tape makes the tone sound higher in pitch. Most...
When I used cassettes, I found that putting a small AM radio next to my keyboard, and tuning until I could hear the transfer (lots of spots on the dial), I...
Hello, There are any number of reasons why a tape doesn't play properly. The Azimuth Adjustment screw that Neil was talking about most probably isn't the...
What Grant talks about here is the result of rf interference. It should not be used as a guage for correct settings. Each tape deck will have varying levels...
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