rcbus-z8: baby steps

EtchedPixels · Dec 3, 2024 · 15ae0d7 · 15ae0d7
1 parent 3cf7eea
commit 15ae0d7
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Showing 3 changed files with 16 additions and 23 deletions.
diff --git a/Kernel/platform/platform-rcbus-z8/Makefile b/Kernel/platform/platform-rcbus-z8/Makefile
@@ -48,7 +48,7 @@ clean:
 	rm -f $(OBJS) $(JUNK)  core *~ bootblock.bin bootblock fuzix.bin loader.tmp
 
 image: 
-	$(CROSS_LD) -i -b -Z 48 -C 0x0100 -D 0x0000 -S 0xF000 -f CXSDLBbs -o fuzix.bin crt0.o devices.o main.o \
+	$(CROSS_LD) -b -Z 48 -C 0x0100 -S 0xF000 -f CLDBbXSs -o fuzix.bin crt0.o devices.o main.o \
 	discard.o commonmem.o tricks.o rcbus-z8.o devtty.o \
 	../../start.o ../../version.o ../../cpu-z8/lowlevel-z8.o \
 	../../mm/bankfixed.o ../../timer.o ../../kdata.o  ../../mm/memalloc_none.o \

diff --git a/Kernel/platform/platform-rcbus-z8/config.h b/Kernel/platform/platform-rcbus-z8/config.h
@@ -58,10 +58,13 @@
 #if 0
 #define SWAPDEV  (256 + 1)  /* Device for swapping. (FIXME) */
 #endif
-#define NBUFS    8	  /* Number of block buffers */
-#define NMOUNTS	 4	  /* Number of mounts at a time */
+/* TODO make dynamic */
+#define NBUFS    5	  /* Number of block buffers */
+#define NMOUNTS	 3	  /* Number of mounts at a time */
 
 #define plt_discard()
 #define plt_copyright()
 
 #define BOOTDEVICENAMES "hd#"
+
+#define CONFIG_SMALL
diff --git a/Kernel/platform/platform-rcbus-z8/crt0.S b/Kernel/platform/platform-rcbus-z8/crt0.S
@@ -1,38 +1,28 @@
 #include "../../cpu-z8/kernel-z8.def"
 
+
+;
+;	Loaded at 0x0100
+;	Execution begins at 0x0102
+;	Loaded as a direct image map
+;
 		.code
 .export init
 
 	.word 0x5A38	; magic
-	; Next 5 words and this get trampled by IRQ vectors
 
 init:
         di
 	srp #0x10
 	ld 254,#>kstack_top
 	ld 255,#<kstack_top
 
-        call init_early
+	; Must run before any C code to set up the fast pointers
+	call __reginit
 
-	; Shuffle up the segments we packed at the end and which
-	; cover E000-FFFF areas. We put them in the upper 8K of
-	; the data area in the load (C000-DFFF)
-	ld r12,#0xC0
-	clr r13
-	ld r14,#>__common
-	ld r15,#<__common
-	ld r10,#>__common_size
-	ld r11,#<__common_size
-copy_common:
-	lde r9,@rr12
-	ldc @rr14,r9		; From data to code map
-	incw rr12
-	incw rr14
-	decw rr10
-	jr nz, copy_common
+        call init_early
 
-copy_commondata:
-	; Currently no commondata - add if needed
+	; Wipe the BSS
 
 	ld r12,#>__bss
 	ld r13,#<__bss