Derek Stewart wrote: > Robert, > > When not put Minerva into your machine, then you will have a faster > operating system than JS or earlier and the second screen is working.
Could do, but was responding to original request for possibility of 2nd screen on original QL, pointing to an example of code done to do it. ... >>>I want to present kind of "demo" for QL on the retro-computing >>>competition called Forever see: http://forever.zeroteam.sk >>>I did some graphics already on PC and it looks good (looks cool in fact >>>:-). But, I need to write special screen hadler with following conditions: >>> >>>1) I need to use both screens of the QL without affecting of the 2nd >>>screen by system variables. >>>(if there must be some variables, how much is the minimum for >>>functionality interrupt handler?) Program given in QLAUG does this. >>>2) I still need to call my routine every interrupt (50/60Hz) It links into 50/60Hz interrupt list, using a DBRA delay loop; will have problems on an expanded QL (eg with GC as this runs about 3-4 times as fast(?) as a std QL), but... >>>3) It must run on unexpanded QL with standard QDOS (sandyQboard >>>optional), no aurora, no Q40, Q60, no (S)GC. Plain, pure, virging QL only. For standard QDOS, QLAUG manual has a possible solution. Minerva upgrade has another. ^_^ >>>4) Safe return to Qdos is not required. >>>Anyone has any idea if it's possible? Yes, as suggested. _______________________________________________ QL-Users Mailing List http://www.q-v-d.demon.co.uk/smsqe.htm
