Avalon: Data at 60227

60227: Data buffer - for each room object, creature, scenery item


This 16 byte working buffer handles each room item data set, stored at 31744. Bytes are copied back and forth between store and buffer.
60227	DEFB 0	Type of graphic to draw - checked & dealt with at routine at 51359: 1 = Back wall bricks/scenery, door frames, and wall-floor connector graphics. Also servant and flashing eye cursor 2 = Door 3 = Creature 4 = Interactable objects (e.g. key, chest, scroll) 5 = Missile fired by creature/warlock 6 = Corner-wall section (left) 7 = Corner-wall section (right) 8 = Missile fired by Maroc 14 = Tunnel item - boundary wall, spider or bat 15 = Viewport position for tunnel rooms 32 = Viewport position for standard rooms
60228	DEFW 0	Multiple use: Tunnel number offset (32) stored at 50727 Address pointer to data sets at 26512 (plus offset) stored in routine at 50062 Address pointer to data set for a room object (29551) in the current room (checked at 56959) Pointer to warlock & creature data sets at 27772 and 27828 For missiles, address pointer to missile table at 27868
60230	DEFB 0	Multiple uses: 0 = Back wall door 1 = Right wall door 2 = Left wall door Connecting door set number (from 26512) Tunnel boundary wall type, 1 (right) or 2 (left) - 55042 Tunnel number 0-31 (room number minus 224) stored at 50731. Data set number for object in room interactable objects table at 29551 Creature type setup in routine at 52630 - warlock & creature data at 27772: 1-7 = Warlock 8 = Guardian of Chaos 9 = Goblin warrior 10 = Goblin missile thrower 11 = Wraith 12 = Demon 4 = Spider (creature generation in tunnel at 55128) 8 = Bat (creature generation in tunnel at 55128)
60231	DEFB 0	Overflow/precision byte used when calculating the item's horizontal room position ('true' position is the next - high - byte which follows this one) Acts as a fraction/overflow value for large/small values when this item's horizontal room position is calculated at 51265 Second byte of foreground scenery set (at 32513) stored here in routine at 54545
60232	DEFB 0	Graphic horizontal position within current room, in half character (4-pixel) steps
60233	DEFB 0	Overflow/precision byte used when calculating the item's vertical room position ('true' position is the next - high - byte which follows this one)
60234	DEFB 0	Graphic vertical position within current room, in pixels, from top of room playing area
60235	DEFB 0	64 - item in standard room 254 - spider/bat in tunnel room at 55128 255 - other item in tunnel room (50663)
60236	DEFB 0	Item's horizontal movement speed For room scenery items, calculated at 59630 using the reverse (NEG) of Maroc's horizontal movement speed (60164) > 128 (negative) = left, < 128 (positive) = right
60237	DEFB 0	Item's vertical movement speed For room scenery items, calculated at 59630 using the reverse (NEG) of Maroc's vertical movement speed (60165) > 128 (negative) = up, < 128 (positive) = down
60238	DEFB 0	Item properties byte: ALL - Bit 0 (1) set indicates if any part of graphic is visible on-screen (1 = visible, 0 = not visible) ITEMS - Bit 1 (2) set indicates an item is hidden (e.g. inside a chest) ALL - Bit 2 (4) set if this item needs erasing on-screen, before being re-drawn (e.g. item has changed frame/moved) ITEMS - Bit 3 (8) indicates (when set) that an item is flying/falling - e.g. an item thrown/dropped by the servant (see 52059) ITEMS - Bit 4 (16) set = item currently carried by servant ITEMS - Bit 6 (64) = item is portable DOORS - Bit 3 (8) set (1) if door is open, reset (0) if closed DOORS - Bit 5 (32) set when a door opening/closing is triggered DOORS - Bit 6 (64) set if door is now opening/closing DOORS - Bit 7 (128) set - Maroc has just gone through a doorway MISSILES - Bits 5-8 - length of missile's existence on-screen before disappearing CREATURES - Bit 5 (32) - creature is disintegrating, will need removing post-animation WARLOCKS - Bit 6 (64) trigger warlock disappearance post-materialization animation (52873) - successful object trade WARLOCKS - Bit 7 (128) trigger warlock's appearance, post-materialization animation
60239	DEFB 0	Pre-graphics data byte (see Graphic properties): Bits 0-3 - graphics frame Bit 5 is set - graphic is 'flippable' Bit 6 is set = graphic has a left/right facing direction (e.g. mouse, goblins) Bit 7 is set = graphic is animated
60240	DEFB 0	Graphic address frame offset (>1 for mirrored graphics frames) Used at 57538 to calculate the graphics address pointer offset for the graphic in the table at 38851 Offset address = [(n-1)*2] - e.g. a byte value of 1 = no offset, byte value of 4 = offset of 6 bytes, or 3 x 2-byte pointer addresses Bit 3 (8) - used for creatures with left/right facing graphics, to indicate if they are facing right (set) or left (not set) - see 58203
60241	DEFW 0	Graphic address pointer (in table at 38851), including any offset for the correct graphic frame