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authorDimitri Sokolyuk <demon@dim13.org>2017-08-19 12:15:28 +0200
committerDimitri Sokolyuk <demon@dim13.org>2017-08-19 12:15:28 +0200
commit67d25d837ac55f28a366c0a3b262e439a6e75fc3 (patch)
treedf7715c7724c5935ab87c807f3b8b4ef529315e3 /amforth-6.5/avr8/words/fetch-e.asm
parente0d6784e89dba33226c0edb815bb974486fa7c48 (diff)
Add AmForth
Diffstat (limited to 'amforth-6.5/avr8/words/fetch-e.asm')
-rw-r--r--amforth-6.5/avr8/words/fetch-e.asm51
1 files changed, 51 insertions, 0 deletions
diff --git a/amforth-6.5/avr8/words/fetch-e.asm b/amforth-6.5/avr8/words/fetch-e.asm
new file mode 100644
index 0000000..fb0dee5
--- /dev/null
+++ b/amforth-6.5/avr8/words/fetch-e.asm
@@ -0,0 +1,51 @@
+; ( e-addr - n)
+; Memory
+; read 1 cell from eeprom
+VE_FETCHE:
+ .dw $ff02
+ .db "@e"
+ .dw VE_HEAD
+ .set VE_HEAD = VE_FETCHE
+XT_FETCHE:
+ .dw PFA_FETCHE
+PFA_FETCHE:
+.if WANT_UNIFIED == 1
+ ldi zh, high(EEPROMEND)
+ ldi zl, low(EEPROMEND)
+ cp tosl, zl
+ cpc tosh, zh
+ brlt PFA_FETCHE1
+ brbs 1, PFA_FETCHE1
+ rjmp PFA_FETCHE_OTHER
+.endif
+PFA_FETCHE1:
+ in_ temp2, SREG
+ cli
+ movw zl, tosl
+ rcall PFA_FETCHE2
+ in_ tosl, EEDR
+
+ adiw zl,1
+
+ rcall PFA_FETCHE2
+ in_ tosh, EEDR
+ out_ SREG, temp2
+ jmp_ DO_NEXT
+
+PFA_FETCHE2:
+ sbic EECR, EEPE
+ rjmp PFA_FETCHE2
+
+ out_ EEARH,zh
+ out_ EEARL,zl
+
+ sbi EECR,EERE
+ ret
+
+.if WANT_UNIFIED == 1
+PFA_FETCHE_OTHER:
+ adiw zl, 1
+ sub tosl, zl
+ sbc tosh, zh
+ jmp_ PFA_FETCHI
+.endif