Hardware - How to transfer files from Spectrum to PC.

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║ Iron.              ║
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(R) Jason Frost, EVP-SOFT

Have you ever tried to transfer files from Spectrum to PC?
?  And most likely nothing worked for you, i.e. you thought
that everything was successfully recorded, but then the PC reported that the floppy disk was not
formatted. This is not related to 15ZZTM2
adjustment, but with different synchronization -  1┌─┬────┐
zation, on Spectrum at the beginning  3.D61-WFDE ──oR│ T │
index pulse, and on PC by  2├─┤ │5
end.  But if you have GRM, then you need  GND ──┤D│ Q├─ 1.D71
lucky, just add to  3│ │ │6
only one disk drive controller  2.D68-DRQ ──/C│ Qo─ 13.D71
microcircuit, namely 15ZZTM2, and 4├─┤ │
floppy disks recorded or formatted12.D70-STEP ──oS│ │
the ones on your GRM will be cleaned -  └─┴────┘
to suit absolutely any PC.  Now about the connection. Conclusions 1 and 13
microcircuits D71 (LN1) are separated from the circuit and connected to 5 and 6
TM2 pins respectively. Well, then look at the diagram.

 By the way, there is one drawback in the GRM scheme, namely the incorrect
The correct operating mode of the microcircuits is 55bRTCH.Their data bus is suspended
to Ucc through resistors (assembly) 3.3 kOhm, which often leads to
RFC combustion, especially if BBS is installed on the GRM. To avoid
to avoid possible failure of the radio frequency converter, it is necessary to remove the resistor
assembly, which is located between m/s D65 and D64, and then put
there are 9 resistors, of which the first 8 are 8.5 kOhm, and the last
niy (closest to VG93) - at 3.3 kOhm.