VICKY II - Revision history

Grenouye at 03:50, 28 June 2021

2021-06-28T03:50:22Z

Grenouye: /* Modes */

2021-06-28T03:48:36Z

‎Modes

Grenouye: /* Modes */

2021-06-28T03:48:16Z

‎Modes

Grenouye at 02:55, 28 June 2021

2021-06-28T02:55:55Z

Grenouye at 02:55, 28 June 2021

2021-06-28T02:55:34Z

Grenouye at 02:52, 28 June 2021

2021-06-28T02:52:38Z

Grenouye at 02:46, 28 June 2021

2021-06-28T02:46:15Z

Grenouye at 02:43, 28 June 2021

2021-06-28T02:43:31Z

Grenouye at 02:30, 28 June 2021

2021-06-28T02:30:00Z

Grenouye at 02:24, 28 June 2021

2021-06-28T02:24:30Z

Show changes

← Older revision		Revision as of 03:50, 28 June 2021
Line 1:		Line 1:
−	== VICKY II - the graphics engine ==	+	= VICKY II - the graphics engine =

	"Vicky" is the name of the graphics engine of the C256 Foenix.		"Vicky" is the name of the graphics engine of the C256 Foenix.

@@ Line 259: / Line 259: @@
 - 800 x 600 (hi res)
-{|
+{| class="wikitable"
 |Mstr_Ctrl_Video_Mode0
 |= $01

@@ Line 219: / Line 219: @@
 Modes are enabled and disabled via the Vicky Master Control Register at $AF0000 via the control bits:
-{|
+{| class="wikitable"
 |Mstr_Ctrl_Text_Mode__Lo_En
 |= $01
@@ Line 268: / Line 268: @@
 |0 - No Pixel Doubling, 1- Pixel Doubling (Reduce the Pixel Resolution by 2)
 |}
 == Bitmap Layer ==

@@ Line 31: / Line 31: @@
 The picture below shows how the graphics layers are arranged:
-[[File:Graphics layers.jpg:640px]]
+[[File:Graphics layers.jpg|640px]]
 Vicky Gloabl Memory Map:

@@ Line 31: / Line 31: @@
 The picture below shows how the graphics layers are arranged:
-[[File:Graphics layers.jpg]]
+[[File:Graphics layers.jpg:640px]]
 Vicky Gloabl Memory Map:

← Older revision		Revision as of 02:52, 28 June 2021
Line 30:		Line 30:

	The picture below shows how the graphics layers are arranged:		The picture below shows how the graphics layers are arranged:
		+
	[[File:Graphics layers.jpg]]		[[File:Graphics layers.jpg]]

← Older revision		Revision as of 02:43, 28 June 2021
Line 28:		Line 28:

	Despite the fact that there is an ALPHA value in the LUT, it is not supported/used at all.		Despite the fact that there is an ALPHA value in the LUT, it is not supported/used at all.
		+
		+	The picture below shows how the graphics layers are arranged:
		+	[[File:graphics_layers.jpg]]

	Vicky Gloabl Memory Map:		Vicky Gloabl Memory Map:

@@ Line 265: / Line 265: @@
 |}
 == Bitmap Layer ==
-The bitmap is stored anywhere in video RAM, which starts at bank $B0. If the bitmap is supposed to start at $B0:0000, the BM_START_ADDY has to be set to $00:0000.
+The bitmaps are stored anywhere in video RAM, which starts at bank $B0. If the bitmap is starts at $B0:0000, the BM_START_ADDY has to be set to $00:0000.
-*BM_CONTROL_REG          = $AF0140
+*BM_CONTROL_REG          = $AF:0100 and $AF:0108
 **Bit 0 = disable/enable
 **Bit 1-3 = Target LUT address located at AF:2000 and up.
-*BM_START_ADDY_L         = $AF0141
+**Bit 6 = Bitmap Collision On
-*BM_START_ADDY_M         = $AF0142
+*BM_START_ADDY_L         = $AF:0101 and $AF0109
-*BM_START_ADDY_H         = $AF0143
+*BM_START_ADDY_M         = $AF:0102 and $AF:010A
 == Text Layer ==
-This layer is enabled by setting the Vicky master control register at $AF0000 to have bit 1 enabled. To overlay text on a bitmap display set bit 2 enabled. This will ignore the background color so this bitmap image can show thru.
+This layer is enabled by setting the Vicky master control register at $AF0000 to have bit 1 enabled. To overlay text on a bitmap display set bit 2 enabled. This will ignore the background color so this bitmap image can show through.
-The text layer text itself starts at address $AFA000. At the moment this layer has 128 columns and 64 rows, of these 80 columns and 60 rows are visible on screen at any time. Do remember that Vicky is capable of displaying a border. Its up to the developer to account for the overlap of the border with the text screen and adjust the text position accordingly.
+The text layer text itself starts at address $AF:A000. At the moment this layer has 128 columns and 64 rows, of these 80 columns and 60 rows are visible on screen at any time. Do remember that Vicky is capable of displaying a border. Its up to the developer to account for the overlap of the border with the text screen and adjust the text position accordingly.
 The fore and background color can be set by setting the corresponding bytes for each character starting at $AFC000. The upper 4 bits of every byte specify the foreground of the character and the lower 4 bytes specify the background color. This means that only 16 colors are available for the fore and background each. Both index into the text LUT for either fore or background color.
-*Start of text screen    = $AFA000
+*Start of text screen    = $AF:A000
-*Start of color screen   = $AFC000
+*Start of color screen   = $AF:C000
-*Foreground LUT start    = $AF1F40 (4-bytes per entry)
+*Foreground LUT start    = $AF:1F40 (4-bytes per entry)
-*Background LUT start    = $AF1F80 (4-bytes per entry)
+*Background LUT start    = $AF:1F80 (4-bytes per entry)