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Apple II Technical Notes

Apple II

#26: ROM Revision Summary Page

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• Pixel painting routines support QuickDraw Auxiliary Tool Set stretching and shrinking.

• PPToPort now clips correctly to the current portRect.

• QDStartUp and QDShutDown save and restore the scan line interrupt vector.

• RectInRgn bug fixed.

• ScrollRect works when the ClipRgn and VisRgn are not rectangular.

• SetSysFont works.

• StdPixels now returns with A=0 if the pen is not visible.

• Text underline bug fixed.

• TextBounds works.

New QuickDraw changes:

• Busy flag now maintained correctly by ClosePort, OffsetRgn, InsetRgn,

KillPoly, FillRect, FrameOval, PaintOval, EraseOval, InvertOval,

FillOval, FrameArc, PaintArc, EraseArc, InvertArc, FillArc,

FrameRRect, PaintRRect, EraseRRect, InvertRRect, and FillRRect.

• Cursor appears in correct Super Hi-Res mode as determined by the low byte’s bit 7

(320/640) of the MasterSCB.

SANE

• Elems now can be called from any part of memory.

• HALT exception jumping through the incorrect vector fixed.

• Integer overflow during conversion reported.

• STATUS call moved to ROM.

Scheduler

• Scheduler now accepts a flush function call.

• Task-handling RAM patch (on System Disk 1.0 and later) moved to ROM.

Serial I/O

• First character after an XON is no longer trashed when buffering is not enabled.

• If serial mode bit 17 = 1, parity and framing error suppression are defeated.

• Parity, baud, and data format commands work with buffering.

• STATUS call will not report that a character is ready if the character arrives with a

parity or framing error.

• STATUS call works correctly with XON/XOFF protocol.

SmartPort

• PR#5, following a PR#5 with I/O error (i.e., no disk in drive), now boots as expected.

• SmartPort manipulates only Slot 6 motor on detect so the IWM can run in fast mode.

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Apple IIgs Bedienungsanleitung Seite 4