6502: some code tidy

diff --git a/Kernel/lowlevel-6502.s b/Kernel/lowlevel-6502.s
index 9928048..6e6d4ea 100644 (file)
--- a/Kernel/lowlevel-6502.s
+++ b/Kernel/lowlevel-6502.s
@@ -38,16 +38,12 @@
 ;      On completion U_DATA__U_ERROR an U_DATA__U_RETVAL hold the returns
 ;
 unix_syscall_entry:
-       sty U_DATA__U_CALLNO    ; Save the syscall code
+       jsr map_kernel          ; Ensure kernel is mapped (no-op in some cases)
        lda #1
        sta _kernel_flag        ; In kernel mode
-       jsr map_kernel          ; Ensure kernel is mapped (no-op in some cases)
        cli                     ; Interrupts now ok
        jsr _unix_syscall_i     ; Enter C space via the __interrupt wrapper
        sei                     ; Interrupts back off
-       pha
-       txa
-       pha                     ; Save return code
        lda #0
        sta _kernel_flag
 unix_sig_exit: