msx2: correct for new style IRQ handling

Untested - needs the Makefiles fixing for the fact bootrom.bin has no
rule to create it

diff --git a/Kernel/platform-msx2/msx2.s b/Kernel/platform-msx2/msx2.s
index a1326d7..a0446dd 100644 (file)
--- a/Kernel/platform-msx2/msx2.s
+++ b/Kernel/platform-msx2/msx2.s
@@ -19,7 +19,7 @@
            .globl enaslt
            .globl _mapslot_bank1
            .globl _mapslot_bank2
-           .globl _kernel_flag
+           .globl _need_resched
 
            ; video driver
            .globl _vtinit
@@ -61,16 +61,6 @@
 ; -----------------------------------------------------------------------------
             .area _COMMONMEM
 
-trapmsg:    .ascii "Trapdoor: SP="
-            .db 0
-trapmsg2:   .ascii ", PC="
-            .db 0
-tm_user_sp: .dw 0
-
-tm_stack:
-            .db 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-tm_stack_top:
-
 ; Ideally return to any debugger/monitor
 _trap_monitor:
            di
@@ -82,8 +72,8 @@ _trap_reboot:
            di
            halt
 
-_kernel_flag:
-           .db 1
+_need_resched:
+           .db 0
 
 ; -----------------------------------------------------------------------------
 ; KERNEL MEMORY BANK (below 0xF000, only accessible when the kernel is mapped)

diff --git a/Kernel/platform-msx2/tricks.s b/Kernel/platform-msx2/tricks.s
index 61bf111..8ff22a3 100644 (file)
--- a/Kernel/platform-msx2/tricks.s
+++ b/Kernel/platform-msx2/tricks.s
@@ -8,7 +8,6 @@
         .globl _getproc
         .globl _trap_monitor
         .globl trap_illegal
-        .globl _inint
         .globl _switchout
         .globl _switchin
         .globl _doexec
@@ -52,10 +51,6 @@ _switchout:
         push iy
         ld (U_DATA__U_SP), sp ; this is where the SP is restored in _switchin
 
-        ; set inint to false
-        xor a
-        ld (_inint), a
-
         ; find another process to run (may select this one again)
         call _getproc
 
@@ -113,9 +108,9 @@ _switchin:
         pop hl ; return code
 
         ; enable interrupts, if the ISR isn't already running
-        ld a, (_inint)
+        ld a, (U_DATA__U_ININTERRUPT)
         or a
-        ret z ; in ISR, leave interrupts off
+        ret nz ; in ISR, leave interrupts off
         ei
         ret ; return with interrupts on