EGFX · FUNCTION 35ALPHA · USE AT YOUR OWN RISK

SPRITE_ROM_ONCE

Draw one sprite from a companion ROM.

Draws one 16×16 frame from a page-aligned EGSP v3 pack in a read-only companion ROM, without replacing an active world, resource or tile backend. Use it for an occasional sprite from a second pack while another pack is registered. Returns status 1 for an invalid pack or frame. There is no BASIC helper; set the block directly as shown.

Parameters

Name	Bytes	Description
`PX/PY`	8–11	signed 16-bit position
`IMAGE`	12	frame number
`COLOUR`	13	unused for 2bpp packs; send 0
`FLAGS`	14	&10 mirror X, &20 mirror Y, &40 rotate 90° clockwise
`BANK`	16	source ROM slot
`PAGE`	17	header page, &80–&BF

BASIC example

Tested listing: ex35.bas, run in B-em on a Master 128. Append the EGFX helpers from gfx-basic.bas (the build does this for you), and put the Breakout EGASSETS.rom (with the beta release) in slot 7 where the example draws from &81/&87.

10 MODE 1:HIMEM=&2400:PROCeginit
20 PROCegbegin
30 PROCegxy(120,100):egb%?12=2:egb%?13=0:egb%?14=&10:egb%?16=7:egb%?17=&81:PROCegcall(35)
40 PROCegtext("FN35 OK",8,8):PROCegpresent
50 END

Assembly

        LDA #35 : STA block+5      ; function
        LDA #0  : STA block+7      ; clear ACK
        LDA #&C0 : LDX #block MOD 256 : LDY #block DIV 256
        JSR &FFF1                  ; OSWORD &C0; block+7 = &A5 on success

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