added some misc example files and fixed kernal docs in lib

git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@309 4df02467-bbd4-4a76-a152-e7ce94205b78
This commit is contained in:
marcobaye
2020-11-09 00:43:43 +00:00
parent 5629c58010
commit 125d525b7d
8 changed files with 190 additions and 3 deletions

31
examples/misc/primm.a Normal file
View File

@@ -0,0 +1,31 @@
;ACME 0.97
; zp variables
!addr ptr = $fb
; kernal
!addr k_chrout = $ffd2
; print immediate - prints zero-terminated string located directly
; after calling JSR. returns to opcode following the terminator.
primm pla ; get low byte of return address - 1
tay ; into Y
pla ; get high byte of return address - 1
sta ptr + 1 ; to ptr high
lda #0 ; and zero ptr low, so "(ptr), y" points before text
sta ptr
beq @entry
;;;
--- jsr k_chrout
@entry iny
bne +
; fix high byte
inc ptr + 1
+ lda (ptr), y
bne ---
; push updated address onto stack
lda ptr + 1
pha
tya
pha
rts ; return to caller (after zero-terminated text)