The Sinclair QL Forum

I am looking for some info regarding the floppy controller and pic's on the boards .

any change over versions to the pic 1 and 2 ?

latest firmware 1.37 ?

any schematics available ?

regarding the memory , is it possible to add tms41256 to a 4256 pcb ?? as 1 bank is missing all its chips



hope you can help me with this nfo .

If you board has the three rows of RAM chips - then you can just add a complete row if one is missing.

The newer board was redesigned to have a lot fewer RAM chips by using 4 bit RAM's I believe, but still as 3 lots of 256K

Which Pictures are you referring to?

i thought it were pic's ,
turned out to be PAL's ( pal16l8anc ) --> , not pictures


are there any changes made in their contents ?

Hi,

Ahhh.... Pics of Pals...

Why not take the PAL out of the socket and try and read the code, unless the protect option is programmed in,it is little harder to crack the PAL security.

no pal programmer here ( only pic and gal )

hence my question

Hi,

Is the Trump Card in question v1 or v2

I have got PAL JED files for both.

shematics are from tetroid for 2 version
pal 1 & 2 JEDEKS i dont remember... tetroid has meke a clone with extras all off this is in the forum...
this is the logic for memmory and this the logic for dickdrive....(is the only think i designed)

Thanks for all info !!

very helpfull to get this old material working again.

@Derek_Stewart ,

both cards are version one , can you share the pal's please


techy

i believe pal jedek is from version 1 i post (any one to confirm here....) the version 2 has only les chips on memory