I've many P64 images here, converted from kyroflux raw dump images from a guy and some FDI images from a another guy, and most all of them are working without any cracks.
And converting G64 or NIB to P64 or FDI is a really very bad idea and pointless in the most all cases. G64 and NIB are not NRZI-flux-pulse-level-based diskette image file formats like P64 or FDI.
And I will quote here a guy from the IRC now:
Look at http://www.ti.com.cn/cn/lit/ds/symlink/9602.pdf and http://rootserver.rosseaux.net/stuff/154...ematic.png
The UE4 instrumentation amplifer has a low pass filter, 1.02 MHz is the cutoff at the input. The output of UE4 has another filter, which is 650 kHz, and UD4 is the next stage. The 650khz filter is present again at the output of Q-Out.
Page 3 of that PDF shows the formula t=k*r*c*(1+(1/r)) where t=shortest pulse it will output and 330pf is in the low 10^3pf range. Fig6 on page 5 show the coefficient to be around .4 for low 100s of pf.
The shaping circuitry has pretty sharp 650 kHz lowpass and an additional 1.02 MHz reject.
So it's 344 kHz / 2.468us at the end, also it's a bit higher than the 300 kHz bitrate to compensate for rotational speed misadjustments. That is also what allows the faster bitrates of say... V-Max to work.
And converting G64 or NIB to P64 or FDI is a really very bad idea and pointless in the most all cases. G64 and NIB are not NRZI-flux-pulse-level-based diskette image file formats like P64 or FDI.
And I will quote here a guy from the IRC now:
Look at http://www.ti.com.cn/cn/lit/ds/symlink/9602.pdf and http://rootserver.rosseaux.net/stuff/154...ematic.png
The UE4 instrumentation amplifer has a low pass filter, 1.02 MHz is the cutoff at the input. The output of UE4 has another filter, which is 650 kHz, and UD4 is the next stage. The 650khz filter is present again at the output of Q-Out.
Page 3 of that PDF shows the formula t=k*r*c*(1+(1/r)) where t=shortest pulse it will output and 330pf is in the low 10^3pf range. Fig6 on page 5 show the coefficient to be around .4 for low 100s of pf.
The shaping circuitry has pretty sharp 650 kHz lowpass and an additional 1.02 MHz reject.
So it's 344 kHz / 2.468us at the end, also it's a bit higher than the 300 kHz bitrate to compensate for rotational speed misadjustments. That is also what allows the faster bitrates of say... V-Max to work.