> My remaining QL, in my own build housing, uses twin OSs, an English > MG or > Minerva.each has TKll burned into a 64kb EPROM. > > To burn I had to make an extender for Qjumps programmer and insert > the code > in four pages. > > Would you ever believe that TT's EPROM programmer only worked in the > first > slot past 768k - is that C0000hex, had to leave that space open at > the > bottom of my 256k eprom board. I think a lot of peripherals were like that, since the original Sinclair design only allowed for 640K RAM IIRC, like the early 512k expansion rams, with the rest of the 1MB or so addressing space allocated for peripherals. Then things like Trumpcard came along and used it all for RAM (896K total IIRC) and stopped a lot of add-on cards working as a result. We then went through a little era where people designed peripherals like hard disks and digitisers and other add on cards which worked through an ingenious method with a "read-only" eprom slot. Made life interesting for cards like Qubide, which had jumpers to tell it which memory spaces to use, depending on what type of disk/ram you were using it with.
I have a QEPIII which gets only occasionally use. I normally copy rom images from disk to microdrive, remove the gold card and program eproms that way (image on mdv) or network or sernet to one of the other computers and copy the image over that way. -- Dilwyn Jones -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.4.4/320 - Release Date: 20/04/2006 _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
