Am 25. Januar 2019 07:46:14 schrieb Marko Mäkelä <msmakela@gmail.com>: > > Yes, the slowest of them all is the PAL C64. > >> Oh, that is a surprise to me. I had assumed that all commodores that >> can use a Datasette uses about the same format. But I honestly have >> only used a Datasette on a PET, VIC-20, C64 and C128 (i.e. the >> relatively common 8-bit Commodores). > > The 264 series also has the peculiarity that they display 17 bytes of > file name instead of 16, from the 192-byte tape buffer. > > There are some timing variations even between the non-264 machines, > which you can find in the source code of my "c2n" and "c2nload" > programs. There is also quite a bit of jitter in the pulse widths; I > would say that it is because of sloppily written tape routines. If I > remember correctly, because of this, tapes recorded on a PAL Vic-20 are > not reliably playable on a PAL C64. (Some of the short/medium/long > pulses would sometimes be mis-quantized.) I had assumed it was due to the different clock speeds that tapes were not compatible. I remember advice to transfer files via the PET as its 1MHz clock would be "in between" the VIC and C64. André >Received on 2019-01-26 08:00:04
Archive generated by hypermail 2.2.0.