Optimize PHA PLA

2017-07-19 10:02:10 -07:00 · 2017-07-19 10:02:10 -07:00 · 612d49ad20
parent 102ca9438e
commit 612d49ad20
1 changed files with 1 additions and 3 deletions
--- a/linuxlogo.s
+++ b/linuxlogo.s
@ -66,18 +66,16 @@ DetectCPU
 ; Apple IIgs
 detect_ram
        lda MACHINEID1      ; FBB3: $38 = ][, $EA = ][+, $06 = //e //c IIgs
-        pha
        cmp #$38            ;
        bne apple_iiplus

 apple_ii
-        pla
        jsr IB_HGR          ; HGR on ][
        beq apple_ii_normal ; always, ends with BNE $D01B RTS

 apple_iiplus
+        pha
        jsr AS_HGR         ; ][ = $D000, Only on Apple ][+
-
        pla
        cmp  #$EA           ;  apple ][+?
        bne apple_iie       ; if so keep going