Apple-2gs-SW/iigs-game-engine
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iigs-game-engine/macros/CORE.MACS.S

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Consolidate all of the project macros into one folder; merlin32 only takes one macro path on the command line
2021-08-25 14:34:26 +00:00
****************************************
* Basic Error Macro *
****************************************
_Err mac
bcc NoErr
Shadow based rendering working in demo-5
2023-02-27 21:30:56 +00:00
do ]0 ; (DO if true) Mu
Consolidate all of the project macros into one folder; merlin32 only takes one macro path on the command line
2021-08-25 14:34:26 +00:00
jsr PgmDeath ; this is conditionally compiled if
str ]1 ; we pass in an error statement
else ; (ELSE)
jmp PgmDeath0 ; we just call the simpler error handler
fin ; (FIN)
NoErr eom
More play-around
2020-08-23 05:25:39 +00:00
;
; Dereference a handle that is on the top of the stack
;
First draft of masked tile support Need to have the called provide a copy of the base line address to the masked drawing code and need to verify that the JTable entries are ordered the same way as the byte offset so the same register can be used to load the JMP addresses and patch in the LDA (DP),y instructions.
2021-08-13 15:05:28 +00:00
_Deref MAC
phb ; save caller's data bank register
pha ; push high word of handle on stack
plb ; sets B to the bank byte of the pointer
lda |$0002,x ; load the high word of the master pointer
pha ; and save it on the stack
lda |$0000,x ; load the low word of the master pointer
tax ; and return it in X
pla ; restore the high word in A
plb ; pull the handle's high word high byte off the
; stack
plb ; restore the caller's data bank register
<<<
Stub in more tile rendering functions; does not crash but renders incorrectly
2021-08-13 16:38:06 +00:00
_Mul128 mac
asl
asl
asl
asl
asl
asl
asl
<<<
Switch to using exported Tiled project assets
2021-08-15 01:58:37 +00:00
; Possible optimization (assumes accumulator is <512). 8 cycles/5 bytes vs 14 cycles/7 bytes
; cmp #$0100
; xba
; ror
First draft of masked tile support Need to have the called provide a copy of the base line address to the masked drawing code and need to verify that the JTable entries are ordered the same way as the byte offset so the same register can be used to load the JMP addresses and patch in the LDA (DP),y instructions.
2021-08-13 15:05:28 +00:00
_Div16 mac
lsr
lsr
lsr
lsr
<<<
_R0W0 mac ; Read Bank 0 / Write Bank 0
ldal STATE_REG
and #$FFCF
stal STATE_REG
<<<
_R0W1 mac ; Read Bank 0 / Write Bank 1
ldal STATE_REG
ora #$0010
stal STATE_REG
<<<
_R1W1 mac ; Read Bank 0 / Write Bank 1
ldal STATE_REG
ora #$0030
stal STATE_REG
<<<
_PushReg mac ; Used to save/restore registers when calling subroutines.
pha
phx
phy
<<<
_PullReg mac
ply
plx
pla
<<<
_PushReg2 mac ; Variation to also save the P-register to preserve m/x
pha
phx
phy
php
<<<
_PullReg2 mac
plp
ply
plx
pla
<<<
Checkpoint for WIP scanline render fix for overlays+sprites and user-defined tiles
2023-04-26 05:41:17 +00:00
phxy mac
phx
phy
<<<
plyx mac
ply
plx
<<<
First draft of masked tile support Need to have the called provide a copy of the base line address to the masked drawing code and need to verify that the JTable entries are ordered the same way as the byte offset so the same register can be used to load the JMP addresses and patch in the LDA (DP),y instructions.
2021-08-13 15:05:28 +00:00
jne mac
beq *+5
jmp ]1
<<<
jeq mac
bne *+5
jmp ]1
<<<
Checkpoint for WIP scanline render fix for overlays+sprites and user-defined tiles
2023-04-26 05:41:17 +00:00
jmi mac
bpl *+5
jmp ]1
<<<
jpl mac
bmi *+5
jmp ]1
<<<
First draft of masked tile support Need to have the called provide a copy of the base line address to the masked drawing code and need to verify that the JTable entries are ordered the same way as the byte offset so the same register can be used to load the JMP addresses and patch in the LDA (DP),y instructions.
2021-08-13 15:05:28 +00:00
jcc mac
bcs *+5
jmp ]1
<<<
jcs mac
bcc *+5
jmp ]1
<<<
Checkpoint for WIP scanline render fix for overlays+sprites and user-defined tiles
2023-04-26 05:41:17 +00:00
max mac
cmp ]1
bcs mout
lda ]1
mout <<<
First draft of masked tile support Need to have the called provide a copy of the base line address to the masked drawing code and need to verify that the JTable entries are ordered the same way as the byte offset so the same register can be used to load the JMP addresses and patch in the LDA (DP),y instructions.
2021-08-13 15:05:28 +00:00
min mac
cmp ]1
bcc mout
lda ]1
mout <<<
Initial shell of generalize sprite size support; just for marking the dirty tiles
2021-11-11 23:06:38 +00:00
; Increment a value mod some number.
incmod mac
inc
cmp ]1
bcc out
lda #0
out <<<
decmod mac
dec
bpl out
lda ]1
dec
out <<<
adcmod mac
adc ]1
cmp ]2
bcc out
sbc ]2
out <<<
sbcmod mac
sbc ]1
bpl out
clc
adc ]2
out <<<
Small improvements to sprite prototype to fix dirty tiles getting out of sync
2021-10-31 00:24:23 +00:00
asr16 mac
cmp #$8000
ror
<<<
asr8 mac
cmp #$80
ror
<<<
Initial Tiled tile animation export support * Tiled tile animations read from TSX files * Hooks for initialization generated by the tiled export tool * Animated tiles implements with dynamic tiles backed by 2KB of direct page space in Bank 00 * Animation resolution limited to 1/60th incremenents TODO * Fix crasher in the _DoScriptSequ timer callback * Fix single-line of garbage on the top line of the dynamic tiles
2021-10-06 12:10:09 +00:00
; Macro to define script steps
ScriptStep MAC
IF #=]5
dw {]1+{{]5&#$000F}<<8}},]2,]3,]4
ELSE
dw ]1,]2,]3,]4
FIN
<<<
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