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woz64/core/pseudo.asm

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NASM
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#importonce
#import "../core/mem_map.asm"
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#import "../core/module.asm"
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// ========================================================
// ////// PSEUDO COMMANDS /////////////////////////////////
// ========================================================
.pseudocommand phy {
jsr Pseudo._phy
}
.pseudocommand ply {
jsr Pseudo._ply
}
.pseudocommand phx {
jsr Pseudo._phx
}
.pseudocommand plx {
jsr Pseudo._plx
}
.pseudocommand phr {
pha
phx
phy
}
.pseudocommand plr {
plx
ply
pla
}
.filenamespace Pseudo
// ========================================================
// ////// METHODS /////////////////////////////////////////
// ========================================================
* = * "Pseudo Commands"
// --------------------------------------------------------
// init -
// Module Init.
// --------------------------------------------------------
init: {
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lda #$FF
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sta MemMap.CORE.xStackOffset
sta MemMap.CORE.yStackOffset
rts
}
// --------------------------------------------------------
// toDebug -
// Print debug info.
// --------------------------------------------------------
toDebug: {
ModuleToDebug(module_type, module_name, version)
rts
}
_phx: {
pha // Save A
tya // Tansfer Y in A
pha // Save Y as A
inc MemMap.CORE.xStackOffset // Increment Stack offset
ldy MemMap.CORE.xStackOffset // Load new Stack offset in Y
txa // Move X in A
sta MemMap.CORE.XStack, y // Save X (as A) in YStack + offset (y)
pla // Load saved A (was Y)
tay // restore Y from A
pla // restore A
rts
}
_plx: {
pha // Save A
tya // Tansfer X in A
pha // Save X as A
ldx MemMap.CORE.xStackOffset // Load Stack offset
lda MemMap.CORE.XStack, x // Load Y from stack
tax
dec MemMap.CORE.xStackOffset // Dcrement stack offset
pla // Load saved A (was X)
tay // restore X from A
pla
rts
}
_phy: {
pha // Save A
txa // Tansfer X in A
pha // Save X as A
inc MemMap.CORE.yStackOffset // Increment Stack offset
ldx MemMap.CORE.yStackOffset // Load new Stack offset in X
tya // Move Y in A
sta MemMap.CORE.YStack, x // Save Y (as A) in XStack + offset (x)
pla // Load saved A (was X)
tax // restore X from A
pla // restore A
rts
}
_ply: {
pha // Save A
txa // Tansfer X in A
pha // Save X as A
ldx MemMap.CORE.yStackOffset // Load Stack offset
ldy MemMap.CORE.YStack, x // Load Y from stack
dec MemMap.CORE.yStackOffset // Dcrement stack offset
pla // Load saved A (was X)
tax // restore X from A
pla // restore A
rts
}
// ========================================================
// ////// DATA ////////////////////////////////////////////
// ========================================================
* = * "Pseudo Data"
module_type: .byte Module.TYPES.CORE
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version: .byte 1, 0, 1
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.encoding "screencode_mixed"
module_name:
.text "pseudo"
.byte 0