Jeff mnie poprosil o wklejenie :
No problem for Atari ? Hardware problem exagered ? Lol read this :
The prototype used 74LS01 to drive floppy lines. There are a problem because it can only drive 8mA:
Have a look to the "GUARANTEED OPERATING RANGES" table:
http://maven.smith.edu/~thiebaut/270/da … 01rev5.pdf
The Atari ST use 220ohms pull- up:
http://atari4ever.free.fr/hardware/doc/1040ste.zip (1040ste03.tif) R307.
So you know the U=R*I rule i suppose ?
So 5=220*I I= 22,7mA
The emulator/drive must be able to drive at least 22,7mA... (in fact the standard value is 24mA or 32mA)
But it cannot because the emulator is limited at 8mA!
22,7mA >> 8mA.
the 74LS01 is overdriven... One day it will burn ...
And if you look at the floppy Data line with an oscilloscope you will understand the problem ;-)
So the device is unreliable, even on Atari ST...
(There some others hardware flaws regarding the sdcard compatitibily/reliability, more complex, but i can demonstrate it if you want...)
And regarding the prototype firmware, with all these bugs,... good luck, because there are no more support, and the HFE file format file will change soon ;-).
You know, This version is called "Prototype version" for good reasons : This device is a prototype, there are a lot of design flaws, is not reliable, and cannot be sold...
And all people donwloading the PCB/schematic file are aware of this since the beginning!:
There are a warning.txt file in the archive where you can read :
<<
This PCB is a prototype version of the StandAlone HxC Floppy Emulator!
This PCB is not recommended for production.
The schematic will change soon, and next versions of the firmware will no more support this schematic/pcb.
For test/development only!
Jeff / HxC2001
>>
Did you read it ?
That's why we have to redesign the unit for the production to correct all these flaws...
So you sell it at 60zl, but in fact this is a way too much regarding the quality/reliability of the device...
I hope that you will inform the buyers about this...
