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Neon816: VMODELINE, SPI2 commands; save a few bytes

This commit is contained in:
mgcaret 2019-12-15 15:13:20 -08:00
parent 3ad1f1e18b
commit 36391ed21d
1 changed files with 116 additions and 15 deletions
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131
platforms/Neon816/platform-lib.s
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@ -42,7 +42,6 @@ dword PS2K_QUERY,"PS2K?"
eword
dword PS2K_FETCH,"PS2K@"
lda #$0000
sep #SHORT_A
.a8
: lda f:PS2Kstat
@ -51,9 +50,9 @@ dword PS2K_FETCH,"PS2K@"
lda f:PS2Kio
rep #SHORT_A
.a16
tay
lda #$0000
PUSHNEXT
and #$00FF
jsr _pusha
NEXT
eword
dword PS2M_STORE,"PS2M!"
@ -85,7 +84,6 @@ dword PS2M_QUERY,"PS2M?"
eword
dword PS2M_FETCH,"PS2M@"
lda #$0000
sep #SHORT_A
.a8
: lda f:PS2Mstat
@ -94,9 +92,9 @@ dword PS2M_FETCH,"PS2M@"
lda f:PS2Mio
rep #SHORT_A
.a16
tay
lda #$0000
PUSHNEXT
and #$00FF
jsr _pusha
NEXT
eword
dword dKBDRESET,"$KBDRESET"
@ -196,9 +194,8 @@ dofetch: sta f:I2C2ctrl
rep #SHORT_A
.a16
and #$00FF
tay
lda #$0000
PUSHNEXT
jsr _pusha
NEXT
eword
dword I2C2_FETCH,"I2C2@+"
@ -238,9 +235,8 @@ dword VDC_C_FETCH,"VDCC@"
.a16
plx ; restore SP
and #$00FF
tay
lda #$0000
PUSHNEXT
jsr _pusha
NEXT
eword
dword VDC_STORE,"VDC!"
@ -284,7 +280,7 @@ dword VIDSTART,"VIDSTART"
ONLIT $0272
ONLIT $1E
.dword VDC_STORE
ONLIT $92
vid_on: ONLIT $92
: .dword ZERO
.dword VDC_C_STORE
.dword ZERO
@ -302,6 +298,37 @@ dword VIDSTART,"VIDSTART"
EXIT
eword
dword VMODELINE,"VMODELINE"
ENTER
.dword TWO
.dword MINUS
ONLIT $1E
.dword VDC_STORE
.dword DECR
ONLIT $1C
.dword VDC_STORE
.dword DECR
ONLIT $1A
.dword VDC_STORE
.dword DECR
ONLIT $18
.dword VDC_STORE
.dword TWO
.dword MINUS
ONLIT $16
.dword VDC_STORE
.dword DECR
ONLIT $14
.dword VDC_STORE
.dword DECR
ONLIT $12
.dword VDC_STORE
.dword DECR
ONLIT $10
.dword VDC_STORE
JUMP VIDSTART::vid_on
eword
dword VIDSTOP,"VIDSTOP"
ENTER
.dword I2C2START
@ -353,6 +380,80 @@ dump_size = $0100
EXIT
eword
dword SPI2INIT,"SPI2INIT"
sep #SHORT_A
.a8
lda #$00
sta f:SPI2ctrl
sta f:SPI2ctrl2
lda #$05
sta f:SPI2ctrl3
rep #SHORT_A
.a16
NEXT
eword
dword SPI2START,"SPI2START"
sep #SHORT_A
.a8
lda #$01
sta f:SPI2ctrl
rep #SHORT_A
.a16
NEXT
eword
dword SPI2STOP,"SPI2STOP"
sep #SHORT_A
.a8
: lda f:SPI2ctrl
and #$40
bne :-
sta f:SPI2ctrl ; note A=0
rep #SHORT_A
.a16
NEXT
eword
; NOTE: sets short accumulator and leaves it that way on exit!
.proc SPI2_busy_wait
sep #SHORT_A
nosep:
.a8
: lda f:SPI2ctrl
rol
bcs :-
rts
.a16
.endproc
dword SPI2_STORE,"SPI2!"
jsr _popay
jsr SPI2_busy_wait
.a8
tya
sta f:SPI2io
rep #SHORT_A
.a16
NEXT
eword
dword SPI2_FETCH,"SPI2@"
jsr SPI2_busy_wait
.a8
lda #$00
sta f:SPI2io
: lda f:SPI2ctrl
bit #$40
bne :-
lda f:SPI2io
rep #SHORT_A
.a16
and #$00FF
jsr _pusha
NEXT
eword
dend
; and now for the system interface