CompuServe test bed

CompuServe Thread

Forum unknown · Modula-2

#BOB's

5 messages in this thread
#101163From: Rhett RodewaldJan 2, 1988 1:04 PM
Using TDI's Modula-2 v. 3.00, My friend Kevin Kelm and I are working on a game that uses a SuperBitMap, and OverScan Display. We have the BOB's working fine on a normal screen, but when we try to use them on the above setup, we lose 464 bytes of memory every time we use DrawGList to move the BOBs. Does anyone know what difference the SuberBitMap makes on the usage of BOBs?
#101191From: Mike LawrenceJan 2, 1988 5:43 PM
Are you using ScrollRaster? I recall reading somewhere that on a certain type of screen (I think either superbitmap or dual playfield) that you loose memory with ScrollRaster. As I recall, this is a bug in AmigaDOS 1.2
#101344From: Mike LawrenceJan 3, 1988 1:01 PM
I found the exact reference. It's on page 52 of the Sept/Oct 1987 AmigaWorld. It basically says that scrolling to the left or right in a SuperBitMap window causes memory loss, and the solution is to allocate you own TmpRas since the one the OS allocates is not de-allocated. Mike 70030,160
#101344From: Mike LawrenceJan 3, 1988 1:01 PM
I found the exact reference. It's on page 52 of the Sept/Oct 1987 AmigaWorld. It basically says that scrolling to the left or right in a SuperBitMap window causes memory loss, and the solution is to allocate you own TmpRas since the one the OS allocates is not de-allocated. Mike 70030,160
#101191From: Mike LawrenceJan 2, 1988 5:43 PM
Are you using ScrollRaster? I recall reading somewhere that on a certain type of screen (I think either superbitmap or dual playfield) that you loose memory with ScrollRaster. As I recall, this is a bug in AmigaDOS 1.2