BlackBox Component Builder Forums

There was a discussion titled How to disable the window close button started on the Oberon microsystems mailing list on 19th Jun 2014. Although the aim was different to yours I think there should be enough information there to enable you to do what you are trying to do. Unfortunately the archives at...

To avoid this problem follow these instructions from Chapter 4 Server installation (Windows only) of the BlackBox Component Builder User Manual (System/Douc/User-Man). In your case the workstation and the server are the same machine: 1) Install BlackBox in a directory on the server machine, using Se...

1. Read the discussion Numerical Analysis (including the references regarding rounding) contained in some of those posts.

2. For this particular example use Math.IntPower to get the answer you want.

I don't understand the significance of the "largeint support" comment here. Does it mean this code works with INTEGERs and LONGINTs, or with the latter only? Only LONGINTs. After more investigation I found CPL486.GenDiv which handles both DIV and MOD for all the smaller integer types. WAR...

Please post your solutions and explanations to Quick Quiz #2 as a reply to this message.

How many semicolons need to be removed from the following code snippet before it will compile? Please post your solution here to give others a chance to think about it first before looking at your answer.

It's one thing to have communications that are restricted to a small governing board, but it's quite another to use that forum for any discussion that could benefit from public input. There are already too few people in the community. Doug Danforth's thread entitled "Killer app" is a case...

I wonder how the BlackBox compiler implements MOD & DIV - does anyone know? These look like the relevant lines of code from DevCPC486: (* largeint support *) | div: IF rev THEN DevCPL486.GenFDOp(FDIVR, y) ELSE DevCPL486.GenFDOp(FDIV, y) END; Floor(y, FALSE) | mod: IF y.mode # Reg THEN LoadR(y);...

1. The main issue is one of operator precedence. The monadic - operator has a lower precedence than the multiplicative operators DIV and MOD. Hence: q := -10 DIV 3; r := -10 MOD 3; are equivalent to: q := -(10 DIV 3); r := -(10 MOD 3); so: q = -3 r = -1 2. However: x := -10; q := x DIV 3; r := x MOD...

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