far_ptr.s (2067B)
1;-------------------------------------------------------------------------- 2; far_ptr.s 3; 4; Copyright (C) 2020, Tony Pavlov 5; 6; This library is free software; you can redistribute it and/or modify it 7; under the terms of the GNU General Public License as published by the 8; Free Software Foundation; either version 2, or (at your option) any 9; later version. 10; 11; This library is distributed in the hope that it will be useful, 12; but WITHOUT ANY WARRANTY; without even the implied warranty of 13; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14; GNU General Public License for more details. 15; 16; You should have received a copy of the GNU General Public License 17; along with this library; see the file COPYING. If not, write to the 18; Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, 19; MA 02110-1301, USA. 20; 21; As a special exception, if you link this library with other files, 22; some of which are compiled with SDCC, to produce an executable, 23; this library does not by itself cause the resulting executable to 24; be covered by the GNU General Public License. This exception does 25; not however invalidate any other reasons why the executable file 26; might be covered by the GNU General Public License. 27;-------------------------------------------------------------------------- 28 29 .module far_ptr 30 31 .include "global.s" 32 33 .area _HOME 34 35___call__banked:: 36 37 ld a, (#.MAP_FRAME1) 38 push af 39 inc sp 40 ld a, (___call_banked_bank) 41 ld (#.MAP_FRAME1), a 42 ld hl, (___call_banked_addr) 43 CALL_HL 44 dec sp 45 pop af 46 ld (#.MAP_FRAME1), a 47 ret 48 49_to_far_ptr:: 50 pop bc 51 pop hl 52 pop de 53 push de 54 push hl 55 push bc 56 ret 57 58 .area _DATA 59 60___call_banked_ptr:: 61___call_banked_addr:: 62 .ds 0x02 ; far pointer offset 63___call_banked_bank:: 64 .ds 0x02 ; far pointer segment