aksguest@engrhub (Milt Roselinsky) (09/08/90)
I'm having problems porting an application that I developed on a IIcx to an SE. The application opens up a window and displays a lot of text in a scrolling window. This works fine on my cx, but when I move the program to an SE, the text displays fine for a short time (maybe 6 lines) and then the text no longer shows up. I'm fairly new to MACs, and I'm stumped as to chasing down this bug. Any pointers would be appreciated. Milt Roselinsky
holmes@Apple.COM (Richard A. Holmes) (09/11/90)
As I understand, if QuickDraw doesn't have enough stack space, it will choose not to "drawstring"; this is better than crashing for lack of stack space. I suspect that perhaps your app is stack-intensive. The default stack space can be different on different machines: Color quickdraw requires more stack than B&W. You could try upping the stack space for your app. I think the calls woul d be some combination of "SetApplLimit" and "MaxApplZone", IM II, 7-51 should explain to some extent. You can test this theory without changing your code by changing the low mem global "DefltStack" using a debugger such as MacsBug or TMON to a larger quantity. "DefltStack" resides in a long word at location (Hexadecimal) $322. I hope it helps: I had a similar problem once and this cured it. I was able to simply reduce my stack usage, and didn't have to increase the stack allocation at all. Let me know if this was the problem. -- (I make no claims as to the truthfulness or lack of truthfulness of any words contained in this posting....) --Richard.
emmayche@dhw68k.cts.com (Mark Hartman) (09/15/90)
Make sure you check your transfer mode (you should be in srcCopy) -
transfer modes work differently on the Mac ][ family. (We got bit
by this a couple of years ago, and reported it, but no changes ever
got made as far as I know.)
--
------------
Mark Hartman
uucp: ...{spsd,zardoz,felix}!dhw68k!emmayche Internet:emmayche@dhw68k.cts.com
CompuServe: >internet:emmayche@dhw68k.cts.com Applelink: N1083