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ti84: wip
Gave more priority to CPU in the emulator because initialization would otherwise be horrendously slow.
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@ -1 +1,15 @@
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1 3 LOADR+
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( Required config: TI_MEM )
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: TI_MEM+ [ TI_MEM LITN ] @ + ;
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: LCD_PORT_CMD 0x10 ; : LCD_PORT_DATA 0x11 ;
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: FNTW 3 ; : FNTH 5 ;
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( Wait until the lcd is ready to receive a command. It's a bit
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weird to implement a waiting routine in asm, but the forth
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version is a bit heavy and we don't want to wait longer than
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we have to. )
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: LCDWAIT
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BEGIN,
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LCD_PORT_CMD INAn,
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RLA, ( When 7th bit is clr, we can send a new cmd )
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JRC, AGAIN,
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;CODE
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: LCD$ H@ TI_MEM ! FNTH 2 * 2+ ALLOT ;
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@ -1,9 +1,3 @@
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( Required config: TI_MEM )
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: TI_MEM+ [ TI_MEM LITN ] @ + ;
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: LCD_PORT_CMD 0x10 ;
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: LCD_PORT_DATA 0x11 ;
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: FNTW 3 ;
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: FNTH 5 ;
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( Current Y position on the LCD, that is, where we're going to
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spit our next glyph. )
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: LCD_CURY 0 TI_MEM+ ;
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@ -1,13 +1,8 @@
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: _wait ( Wait until the lcd is ready to receive a command )
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( When 7th bit is cleared, we can send a new command )
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BEGIN LCD_PORT_CMD PC@ 0x80 AND NOT UNTIL ;
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: _cmd LCD_PORT_CMD PC! _wait ;
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: _data! LCD_PORT_DATA PC! _wait ;
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: _data@ LCD_PORT_DATA PC@ _wait ;
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: _cmd LCD_PORT_CMD PC! LCDWAIT ;
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: _data! LCD_PORT_DATA PC! LCDWAIT ;
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: _data@ LCD_PORT_DATA PC@ LCDWAIT ;
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: LCDOFF 0x02 ( CMD_DISABLE ) _cmd ;
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: _col! ( col -- )
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0x20 ( CMD_COL ) + _cmd ;
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: _row! ( row -- )
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0x80 ( CMD_ROW ) + _cmd ;
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: LCD$ H@ TI_MEM ! FNTH 2 * 2+ ALLOT ;
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@ -225,11 +225,8 @@ void draw_pixels()
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void event_loop()
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{
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while (1) {
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emul_step();
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emul_steps(100);
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if (lcd_changed) {
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// To avoid overdrawing, we'll let the CPU run a bit to finish its
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// drawing operation.
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emul_steps(100);
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draw_pixels();
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}
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// A low tech way of checking when the window was closed. The proper way
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@ -11,10 +11,13 @@ RAMSTART 0x70 + CONSTANT TI_MEM
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CURRENT @ XCURRENT !
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282 LOAD ( boot.z80 )
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555 LOAD ( ti.z80 )
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393 LOAD ( icore )
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(entry) _
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( Update LATEST )
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PC ORG @ 8 + !
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," 42 42 PC! BYE "
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422 437 XPACKR ( core )
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556 558 XPACKR ( ti )
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," 42 42 PC! LCD$ 43 43 PC! BYE "
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ORG @ 256 /MOD 2 PC! 2 PC!
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H@ 256 /MOD 2 PC! 2 PC!
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