msx1: allow for more load space

Once we've used the ROM services we move our sp up high and save just the stuff
we need at 0xFCxx

diff --git a/Kernel/platform-msx1/cartridge.s b/Kernel/platform-msx1/cartridge.s
index 5d3944f..5fb17af 100644 (file)
--- a/Kernel/platform-msx1/cartridge.s
+++ b/Kernel/platform-msx1/cartridge.s
@@ -35,8 +35,6 @@
 CHPUT          .equ 0x00A2
 INITXT         .equ 0x006F
 EXPTBL         .equ 0xFCC1
-SLTTBL         .equ 0xFCC5
-SLTATR         .equ 0xFCC9
 
 pstring:
                ld a,(hl)
@@ -116,6 +114,8 @@ wtfami:             ld sp,#0xF380           ; below system variables
                ; We'd like the use the ROM services but unfortunately they
                ; don't actually work for the top 16K in MSX
 
+               ld sp,#0xfcc0           ; We can trash the sysvars below this
+
                ld ix,#0xffff           ; subslot control byte
 
                di
@@ -170,7 +170,7 @@ wtfami:             ld sp,#0xF380           ; below system variables
                exx
 
                ld hl,#0xC000
-               ld bc,#0x3300
+               ld bc,#0x3C80
 
 copy_common_loop:
                exx                     ; Paging values