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81 lines
4.4 KiB
C
81 lines
4.4 KiB
C
/*****************************************************************************/
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/* */
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/* _atari5200os.h */
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/* */
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/* Internal include file, do not use directly */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#ifndef __ATARI5200OS_H
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#define __ATARI5200OS_H
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struct __os {
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/*Page zero*/
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unsigned char pokmsk; // = $00 System mask for POKEY IRQ enable
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unsigned char rtclok[2]; // = $01,$02 Real time clock
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unsigned char critic; // = $03 Critical section flag
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unsigned char atract; // = $04 Attract mode counter
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union {
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struct {
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unsigned char sdlstl; // = $05 Save display list LO
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unsigned char sdlsth; // = $06 Save display list HI
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};
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void* sdlst; // = $05,$06 Display list shadow
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};
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unsigned char sdmctl; // = $07 DMACTL shadow
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unsigned char pcolr0; // = $08 PM color 0
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unsigned char pcolr1; // = $09 PM color 1
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unsigned char pcolr2; // = $0A PM color 2
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unsigned char pcolr3; // = $0B PM color 3
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unsigned char color0; // = $0C PF color 0
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unsigned char color1; // = $0D PF color 1
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unsigned char color2; // = $0E PF color 2
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unsigned char color3; // = $0F PF color 3
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unsigned char color4; // = $10 PF color 4
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unsigned char _free_1[0xEF]; // = $11-$FF User space
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/*Stack*/
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unsigned char stack[0x100]; // = $100-$1FF Stack
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/*Page 2 OS variables*/
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void (*vinter)(void); // = $200 Immediate IRQ vector
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void (*vvblki)(void); // = $202 Immediate VBI vector
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void (*vvblkd)(void); // = $204 Deferred VBI vector
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void (*vdslst)(void); // = $206 DLI vector
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void (*vkeybd)(void); // = $208 Keyboard IRQ vector
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void (*vkeypd)(void); // = $20A Keyboard continuation vector
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void (*vbrkky)(void); // = $20C Break key interrupt vector
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void (*vbreak)(void); // = $20E BRK instruction interrupt vector
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void (*vserin)(void); // = $210 Serial input ready vector
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void (*vseror)(void); // = $212 Serial output data needed vector
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void (*vseroc)(void); // = $214 Serial output completed vector
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void (*vtimr1)(void); // = $216 POKEY timer 1 IRQ vector
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void (*vtimr2)(void); // = $218 POKEY timer 2 IRQ vector
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void (*vtimr4)(void); // = $21A POKEY timer 4 IRQ vector
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};
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#endif
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