Disassembly:Bios - Revision history

E5frog at 09:33, 16 August 2020

2020-08-16T09:33:46Z

2020-08-16T09:24:45Z

2019-07-31T18:02:46Z

2019-03-01T19:46:38Z

2014-03-01T14:08:44Z

2012-11-16T21:22:46Z

1 revision

2005-10-13T22:07:54Z

@@ Line 1,599: / Line 1,599: @@
 	.byte	%00000000
-				db $08,$08,$08,$08,$08	;|
+	; Hockey (Tennis) players
-				db $20,$20,$20,$20,$20	;|
+	.byte	%00001000
-				db $10,$10,$20,$40,$40	; rest are slanted lines
+	.byte	%00001000
-				db $08,$10,$20,$40,$80
+	.byte	%00001000
-				db $00,$18,$20,$C0,$00
+	.byte	%00001000
-				db $00,$C0,$20,$18,$00
+	.byte	%00001000
 </pre>

@@ Line 165: / Line 165: @@
 ; clears the screen to a color and palette specified in r3
-clrscrn:
+	; clear screen to gray
 	; save return address
 	lr	K, P

← Older revision		Revision as of 18:02, 31 July 2019
Line 1:		Line 1:
−	~~{{Incomplete Disassembly}}~~

−	This is the disassembly of the [[Channel F]] [[bios]] made and partially annotated by Sean Riddle. This code is copyright © 1976 Fairchild Semiconductor. ~~The original disassembly can be found here: [http://members.cox.net/seanandalicia/chanf.asm]~~	+	This is the disassembly of the [[Channel F]] [[bios]] made and partially annotated by Sean Riddle. This code is copyright © 1976 Fairchild Semiconductor.

	<pre>		<pre>

@@ Line 1,395: / Line 1,395: @@
                  LI   $60                 ; 0742 20 60
                  OUTS 0                   ; 0744 b0
-                 LI   $50                 ; 0745 20 50
+                 LI   $50                 ; 0745 20 50 - bit 4 is however n/c, so $40 can be used
                  OUTS 0                   ; 0747 b0
                  LR   A,$1                ; 0748 41

@@ Line 11: / Line 11: @@
 ;=======;
-; this is the code executed when the cartridge first
+; this is the code executed when the system first
 ; starts up. it clears the registers, sets the K stack
 ; pointer, and checks to see if a cartridge is inserted

← Older revision	Revision as of 21:22, 16 November 2012
(No difference)