In article <[EMAIL PROTECTED]>, [EMAIL PROTECTED] writes >Here's a little oddity... > >I have got 3 ZX microdrives which supposedly work with the Spectrum (and >Interface 1). However, I have tested them by adding them to the QL's >microdrive expansion port and using FORMAT ram1_mdv3 (thanks Miracle) with >the following results: > >1) All 3 plugged in together, give format failed on mdv3 to mdv5 >2) I tried the middle ZX Microdrive on its own - that gave format failed.. >3) I tried each of the other two ZX Microdrive units on their own - both give >255/255 sectors (ie. all sectors on the cartridge are copied across). >4) I tried these 2 working ZX Microdrive units together - both now allow the >format command to copy the microdrive cartridge, but they only give 248/255 >sectors and 221/255 sectors > >Hmm - is there a loss of signal when using more than one add-on ZX Microdrive >?? I seem to recall that these units were not up to the same standard as the >built -in QL microdrives - am I correct??
Umm ... I have heard of this problem before. Yet I do not know the answer, and I have not owned/used the equipment. It suggest either power to all the drives as collective is a difficulty, or the logical assignment of each drive in the 'chain'. No doubt someone will have a better answer. -- Malcolm Cadman
