94 lines
1.1 KiB
C
94 lines
1.1 KiB
C
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#include <types.h>
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extern pascal void SetMasterSCB(Word) inline(0x1604,dispatcher);
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extern pascal void SetAllSCBs(Word) inline(0x1404,dispatcher);
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extern pascal void SetColorTable(Word, ColorTable) inline(0x0E04,dispatcher);
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void ClearScreen(void);
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void screen_init(void) {
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#define WHITE 0x0fff
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#define YELLOW 0x0ff0
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#define BLACK 0x0000
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#define BLUE 0x000f
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#define GREEN 0x0080
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#define RED 0x0f00
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static ColorTable ct =
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{
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WHITE, // background
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RED, // underline / blink
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BLUE, // bold
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GREEN, // foreground
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WHITE,
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RED,
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BLUE,
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GREEN,
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WHITE,
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RED,
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BLUE,
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GREEN,
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WHITE,
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RED,
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BLUE,
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GREEN,
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};
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unsigned i;
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SetMasterSCB(0xc080);
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SetAllSCBs(0xc080);
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for (i = 0; i < 16; i++)
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SetColorTable(i, ct);
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ClearScreen();
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// linearize memory, enable shadowing.
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asm {
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phb
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pea 0xe0e0
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plb
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plb
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sep #0x20
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lda #0xC1
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tsb 0xc029
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lda #0x08
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trb 0xc035
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rep #0x20
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plb
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}
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}
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asm void screen_on(void) {
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phb
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pea 0xe0e0
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plb
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plb
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sep #0x20
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lda #0x80
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tsb 0xc029
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rep #0x20
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plb
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rtl
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}
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asm void screen_off(void) {
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phb
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pea 0xe0e0
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plb
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plb
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sep #0x20
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lda #0x80
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trb 0xc029
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rep #0x20
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plb
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rtl
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} |