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| author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-03-22 19:52:48 +0000 |
|---|---|---|
| committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2009-03-22 19:52:48 +0000 |
| commit | 94432d7c9193cb123c7121d07957681493852760 (patch) | |
| tree | a3d8540e68d45cb691a24b2a6b96437ee537bce3 /nuttx/configs/xtrs | |
| parent | 7ed74e1e25fee6c29061fe600f617cf432887c03 (diff) | |
| download | px4-nuttx-94432d7c9193cb123c7121d07957681493852760.tar.gz px4-nuttx-94432d7c9193cb123c7121d07957681493852760.tar.bz2 px4-nuttx-94432d7c9193cb123c7121d07957681493852760.zip | |
Patch [2696648] Z80: interrupt flag stored in parity bit
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1640 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/configs/xtrs')
| -rw-r--r-- | nuttx/configs/xtrs/src/xtrs_head.asm | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/nuttx/configs/xtrs/src/xtrs_head.asm b/nuttx/configs/xtrs/src/xtrs_head.asm index 9ead016fd..5fb33c3c8 100644 --- a/nuttx/configs/xtrs/src/xtrs_head.asm +++ b/nuttx/configs/xtrs/src/xtrs_head.asm @@ -1,7 +1,7 @@ ;************************************************************************** ; configs/xtrs/src/xtrs_head.asm ; -; Copyright (C) 2008 Gregory Nutt. All rights reserved. +; Copyright (C) 2008-2009 Gregory Nutt. All rights reserved. ; Author: Gregory Nutt <spudmonkey@racsa.co.cr> ; ; Redistribution and use in source and binary forms, with or without @@ -42,7 +42,7 @@ ; Register save area layout - XCPT_I == 0 ; Offset 0: Saved I w/interrupt state in carry + XCPT_I == 0 ; Offset 0: Saved I w/interrupt state in parity XCPT_BC == 2 ; Offset 1: Saved BC register XCPT_DE == 4 ; Offset 2: Saved DE register XCPT_IX == 6 ; Offset 3: Saved IX register @@ -198,8 +198,8 @@ _up_rstcommon: push bc ; Offset 1: BC ld b, a ; Save the reset number in B - ld a, i ; Carry bit holds interrupt state - push af ; Offset 0: I with interrupt state in carry + ld a, i ; Parity bit holds interrupt state + push af ; Offset 0: I with interrupt state in parity di ; Call the interrupt decode logic. SP points to the beggining of the reg structure @@ -221,7 +221,7 @@ _up_rstcommon: ; Restore registers. HL points to the beginning of the reg structure to restore ex af, af' ; Select alternate AF - pop af ; Offset 0: AF' = I with interrupt state in carry + pop af ; Offset 0: AF' = I with interrupt state in parity ex af, af' ; Restore original AF pop bc ; Offset 1: BC pop de ; Offset 2: DE @@ -244,7 +244,7 @@ _up_rstcommon: ; Restore interrupt state ex af, af' ; Recover interrupt state - jr nc, nointenable ; No carry, IFF2=0, means disabled + jp po, nointenable ; Odd parity, IFF2=0, means disabled ex af, af' ; Restore AF (before enabling interrupts) ei ; yes reti |