foo

4 files changed, 22 insertions, 6 deletions

diff --git a/680.inc b/680.inc
new file mode 100644
index 0000000..6ae2abf
--- /dev/null
+++ b/680.inc
@@ -0,0 +1,8 @@
+
+SAVEREG	MACRO
+	movem	d3-d7/a3-a6,-(sp)
+	ENDM
+
+RESTREG	MACRO
+	movem	(sp)+,d3-d7/a3-a6
+	ENDM
diff --git a/loader.c b/loader.c
index 9808b34..64910ee 100644
--- a/loader.c
+++ b/loader.c
@@ -21,17 +21,19 @@ void init_load(void)
 	 * 0x1f  ROM
 	 */
 
+	// RAM pages
 	pages[0x40] = malloc(PAGE_SIZE * sizeof(char));
 	pages[0x41] = malloc(PAGE_SIZE * sizeof(char));
 
+	// ROM pages
 	for (int i = 0; i++; i <= 0x1f) {
 		pages[i] = pages[0x40];
 	}
 
 	mem_page_0 = pages[0];
 	mem_page_loc_0 = 0;
-	mem_page_1 = pages[0x40];
-	mem_page_loc_1 = 0x40;
+	mem_page_1 = pages[0x1f];
+	mem_page_loc_1 = 0x1f;
 	mem_page_2 = pages[0];
 	mem_page_loc_2 = 0;
 	mem_page_3 = pages[0x40];
diff --git a/main.asm b/main.asm
index 05235f5..552d2e0 100644
--- a/main.asm
+++ b/main.asm
@@ -47,6 +47,7 @@
 	xdef	_tigcc_native
 	include "../tios.h"
 
+	include "680.inc"
 
 
 __main:
diff --git a/ports.asm b/ports.asm
index e183e7a..ddc0bef 100644
--- a/ports.asm
+++ b/ports.asm
@@ -540,10 +540,11 @@ port_out_03:
 port_in_04:
 port_out_04:
 	;; Bank B paging, among other things
-	;; XXX save registers
+	SAVEREG
 	move.b	d1,-(a7)
 	jsr	bankswap_b_write
 	addq	2,a7
+	RESTREG
 	rts
 
 port_in_05:
@@ -551,10 +552,11 @@ port_out_05:
 port_in_06:
 port_out_06:
 	;; Bank A paging
-	;; XXX save registers
+	SAVEREG
 	move.b	d1,-(a7)
 	jsr	bankswap_a_write
 	addq	2,a7
+	RESTREG
 	rts
 
 port_in_07:
@@ -677,16 +679,19 @@ port_out_10_set_row:
 
 port_in_11:
 	;; LCD data
-	;; XXX save registers
+	SAVEREG
 	jsr	video_read
 	move.b	d0,d1		; return value
+	RESTREG
 	rts
 
 port_out_11:
 	;; LCD data
+	SAVEREG
 	move.b	d1,-(a7)
-	;; XXX save registers
 	jsr	video_write
+	addq	#2,a7
+	RESTREG
 	rts
 
 port_in_12: