diff options
Diffstat (limited to 'src-68k/echo.68k')
| -rw-r--r-- | src-68k/echo.68k | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/src-68k/echo.68k b/src-68k/echo.68k index 19844fe..8810ab2 100644 --- a/src-68k/echo.68k +++ b/src-68k/echo.68k @@ -41,6 +41,7 @@ Echo_Z80Reset macro Echo_SendCommand: movem.l d1/a1, -(sp) ; Save registers +@Try: Echo_Z80Request ; We need the Z80 bus lea ($A01FFF), a1 ; First try the 1st slot @@ -48,13 +49,11 @@ Echo_SendCommand: beq.s @Ready ; If so, move on subq.l #4, a1 ; Try 2nd slot otherwise -@Try: tst.b (a1) ; Check if 2nd slot is ready beq.s @Ready ; Too busy? Echo_Z80Release ; Let Echo continue move.w #$FF, d1 ; Give it some time dbf d1, * ; ... - Echo_Z80Request ; Get Z80 bus back bra.s @Try ; Try again @Ready: @@ -75,6 +74,7 @@ Echo_SendCommand: Echo_SendCommandAddr: Echo_SendCommandEx: movem.l d0-d1/a1, -(sp) ; Save registers +@Try: Echo_Z80Request ; We need the Z80 bus lea ($A01FFF), a1 ; First try the 1st slot @@ -82,13 +82,11 @@ Echo_SendCommandEx: beq.s @Ready ; If so, move on subq.l #4, a1 ; Try 2nd slot otherwise -@Try: tst.b (a1) ; Check if 2nd slot is ready beq.s @Ready ; Too busy? Echo_Z80Release ; Let Echo continue move.w #$FF, d1 ; Give it some time dbf d1, * ; ... - Echo_Z80Request ; Get Z80 bus back bra.s @Try ; Try again @Ready: @@ -126,18 +124,17 @@ Echo_SendCommandByte: movem.l d1-d2/a1, -(sp) ; Save registers Echo_Z80Request ; We need the Z80 bus +@Try: lea ($A01FFF), a1 ; First try the 1st slot tst.b (a1) ; Is 1st slot available? beq.s @Ready ; If so, move on subq.l #4, a1 ; Try 2nd slot otherwise -@Try: tst.b (a1) ; Check if 2nd slot is ready beq.s @Ready ; Too busy? Echo_Z80Release ; Let Echo continue move.w #$FF, d2 ; Give it some time dbf d2, * ; ... - Echo_Z80Request ; Get Z80 bus back bra.s @Try ; Try again @Ready: |