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changeset 3127:36061ff9e324

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l2 kernel: Replaced literal FF91 and FFA* with symbolic references Zero functional changes; binaries equivalence verified by diff'ing the listing files before and after.
author Neal Crook <foofoobedoo@gmail.com>
date Mon, 28 Nov 2016 13:02:16 +0000
parents f77ac3ae8a43
children a8007a15f06a
files level2/modules/kernel/ccbkrn.asm level2/modules/kernel/fdebug.asm level2/modules/kernel/fmove.asm level2/modules/kernel/krn.asm level2/modules/kernel/krnp2.asm
diffstat 5 files changed, 22 insertions(+), 22 deletions(-) [+]
line wrap: on
line diff
--- a/level2/modules/kernel/ccbkrn.asm	Mon Nov 28 12:54:03 2016 +0000
+++ b/level2/modules/kernel/ccbkrn.asm	Mon Nov 28 13:02:16 2016 +0000
@@ -121,11 +121,11 @@
 BtDebug pshs    cc,d,x          save the register
         orcc    #IntMasks       turn IRQ's off
         ldb     #$3b            block to map in
-        stb     >$FFA0          map the boot screen into block 0
+        stb     >DAT.Regs       map the boot screen into block 0
         ldx     >$0002          where to put the bytes
         sta     ,x+             put the character on-screen
         stx     >$0002          save updated address
-        clr     >$FFA0          map block 0 in again
+        clr     >DAT.Regs       map block 0 in again
         puls    cc,d,x,pc       restore and return
         * This routine just prints "!" and loops forever
 Crash   lda     #'!             print a "!"
@@ -327,7 +327,7 @@
         IFNE    H6309
         ldq     #$00080100      e=Marker, D=Block # to check
 L0111   asld                    get next block #
-        stb     >$FFA5          Map block into block 6 of my task
+        stb     >DAT.Regs+5     Map block into block 6 of my task
         ste     >-$6000,x       save marker to that block
         cmpe    ,x              did it ghost to block 0?
         bne     L0111           No, keep going till ghost is found
@@ -337,7 +337,7 @@
         ldd     #$0008
 L0111   aslb
         rola
-        stb     >$FFA5
+        stb     >DAT.Regs+5
         pshs    a
         lda     #$01
         sta     >-$6000,x
@@ -683,7 +683,7 @@
         lda     1,u             get first block
         ldb     3,u             get a second just in case of overlap
         orcc    #IntMasks       shutdown interupts while we do this
-        std     >$FFA5          map blocks in
+        std     >DAT.Regs+5     map blocks in
         IFNE    H6309
         ldw     #R$Size         get size of register stack
         tfm     x+,y+           copy it
@@ -697,7 +697,7 @@
         ldx     <D.SysDAT       remap the blocks we took out
         lda     $0B,x
         ldb     $0D,x
-        std     >$FFA5
+        std     >DAT.Regs+5
         puls    cc,x,y,u,pc     restore & return
 
 * Process software interupts from system state
@@ -957,7 +957,7 @@
 L0E8D   cmpb    <D.Task1N       are we going back to the same task
         beq     L0EA3           without the DAT image changing?
         stb     <D.Task1N       nope, save current task in map type 1
-        ldx     #$FFA8          get MMU start register for process's
+        ldx     #DAT.Regs+8     get MMU start register for process's
         ldu     <D.TskIPt       get task image pointer table
         ldu     b,u             get address of DAT image
 L0E93   leau    1,u             point to actual MMU block
--- a/level2/modules/kernel/fdebug.asm	Mon Nov 28 12:54:03 2016 +0000
+++ b/level2/modules/kernel/fdebug.asm	Mon Nov 28 13:02:16 2016 +0000
@@ -23,10 +23,10 @@
 * THIS CODE IS SPECIFIC TO THE COCO 3!
 REBOOT   orcc  #IntMasks  turn off IRQ's
          clrb
-         stb   >$FFA0      map in block 0
+         stb   >DAT.Regs   map in block 0
          stb   >$0071      cold reboot
          lda   #$38        bottom of DECB block mapping
-         sta   >$FFA0      map in block zero
+         sta   >DAT.Regs   map in block zero
          stb   >$0071      and cold reboot here, too
          ldu   #$0000      force code to go at offset $0000
          leax  ReBootLoc,pc  reboot code
@@ -41,7 +41,7 @@
 
 ReBootLoc
          ldd   #$3808      block $38, 8 times
-         ldx   #$FFA0      where to put it
+         ldx   #DAT.Regs   where to put it
 Lp       sta   8,x         put into map 1
          sta   ,x+         and into map 0
          inca
@@ -50,7 +50,7 @@
 
          lda   #$4C        standard DECB mapping
          sta   >$FF90
-         clr   >$FF91      go to map type 0
+         clr   >DAT.Task   go to map type 0
          clr   >$FFDE      and to all-ROM mode
          ldd   #$FFFF
 *         clrd              executes as CLRA on a 6809
--- a/level2/modules/kernel/fmove.asm	Mon Nov 28 12:54:03 2016 +0000
+++ b/level2/modules/kernel/fmove.asm	Mon Nov 28 13:02:16 2016 +0000
@@ -86,9 +86,9 @@
          ldw   #$0100       force to 128 bytes
 L0B92    stw   12,s         save count
          orcc  #IntMasks    Shut off interrupts
-         std   >$FFA5       map in the blocks
+         std   >DAT.Regs+5  map in the blocks
          tfm   x+,u+        Copy up to 128 bytes
-         sty   >$FFA5       Restore system blocks 5&6 to normal
+         sty   >DAT.Regs+5  Restore system blocks 5&6 to normal
          andcc #^IntMasks
          ldd   14,s         get full count
          subd  12,s         done?
@@ -147,7 +147,7 @@
          puls  y
          orcc  #IntMasks
          lda   $0E,s  +++
-         sty   >$FFA5
+         sty   >DAT.Regs+5
 ***** NO STACK USE BETWEEN HERE.....
                  tfr   d,y    +++
          andb  #$07
@@ -193,7 +193,7 @@
 L0BBC    ldy   <D.SysDAT
          lda   $0B,y
          ldb   $0D,y
-         std   >$FFA5
+         std   >DAT.Regs+5
 ***** AND HERE...........
          puls  cc
          ldd   $0E,s
--- a/level2/modules/kernel/krn.asm	Mon Nov 28 12:54:03 2016 +0000
+++ b/level2/modules/kernel/krn.asm	Mon Nov 28 13:02:16 2016 +0000
@@ -275,7 +275,7 @@
         IFNE    H6309
         ldq     #$00080100      e=Marker, D=Block # to check
 L0111   asld                    get next block #
-        stb     >$FFA5          Map block into block 6 of my task
+        stb     >DAT.Regs+5     Map block into block 6 of my task
         ste     >-$6000,x       save marker to that block
         cmpe    ,x              did it ghost to block 0?
         bne     L0111           No, keep going till ghost is found
@@ -285,7 +285,7 @@
         ldd     #$0008
 L0111   aslb
         rola
-        stb     >$FFA5
+        stb     >DAT.Regs+5
         pshs    a
         lda     #$01
         sta     >-$6000,x
@@ -580,7 +580,7 @@
         lda     1,u             get first block
         ldb     3,u             get a second just in case of overlap
         orcc    #IntMasks       shutdown interupts while we do this
-        std     >$FFA5          map blocks in
+        std     >DAT.Regs+5     map blocks in
         IFNE    H6309
         ldw     #R$Size         get size of register stack
         tfm     x+,y+           copy it
@@ -594,7 +594,7 @@
         ldx     <D.SysDAT       remap the blocks we took out
         lda     $0B,x
         ldb     $0D,x
-        std     >$FFA5
+        std     >DAT.Regs+5
         puls    cc,x,y,u,pc     restore & return
 
 * Process software interupts from system state
@@ -850,7 +850,7 @@
 L0E8D   cmpb    <D.Task1N       are we going back to the same task
         beq     L0EA3           without the DAT image changing?
         stb     <D.Task1N       nope, save current task in map type 1
-        ldx     #$FFA8          get MMU start register for process's
+        ldx     #DAT.Regs+8     get MMU start register for process's
         ldu     <D.TskIPt       get task image pointer table
         ldu     b,u             get address of DAT image
 L0E93   leau    1,u             point to actual MMU block
--- a/level2/modules/kernel/krnp2.asm	Mon Nov 28 12:54:03 2016 +0000
+++ b/level2/modules/kernel/krnp2.asm	Mon Nov 28 13:02:16 2016 +0000
@@ -157,7 +157,7 @@
          lda    1,u         get 1st block
          ldb    3,u         get a second in case of overlap
          orcc   #IntMasks   shut IRQ's down
-         std    >$FFA5      map in the blocks
+         std    >DAT.Regs+5 map in the blocks
          IFNE   H6309
          ldw    #R$Size     get size of register stack
          tfm    x+,y+       move 'em to process descriptor
@@ -171,7 +171,7 @@
          ldx    <D.SysDAT   get the system DAT image pointer
          lda    $0B,x       get the original blocks
          ldb    $0D,x
-         std    >$FFA5      map 'em back in
+         std    >DAT.Regs+5 map 'em back in
          puls   cc,u,pc     restore IRQ's, register stack pointer & return
      ENDC