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| author | Leo C | 2018-09-23 19:44:22 +0200 |
|---|---|---|
| committer | Leo C | 2018-09-23 19:44:22 +0200 |
| commit | f6154a3944b775a6d6846f132b184d94b44bc204 (patch) | |
| tree | f95798ed2a960d8446c78d9ba494f4398cbf8df4 /z180 | |
| parent | dbc1de70e1824cf1a649d892db5746b86b34b4e7 (diff) | |
| download | z180-stamp-f6154a3944b775a6d6846f132b184d94b44bc204.zip | |
cpu_freq: extra timing loop WIP
Diffstat (limited to 'z180')
| -rw-r--r-- | z180/freqloop.180 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/z180/freqloop.180 b/z180/freqloop.180 new file mode 100644 index 0000000..be1137d --- /dev/null +++ b/z180/freqloop.180 @@ -0,0 +1,20 @@ + .z80 ; for M80, ignored by SLR assembler
+ include z180reg.inc
+
+ aseg
+ org 0
+
+ ld bc,00*256+RCR
+ xor a
+ out (c),a
+ out (040H),a
+ ;Z80 Z180(0W) Z180(MaxW)
+loop: ;--------------------------
+ in a,(050h) ;11 10 +3*3 19
+ jp loop ;10 9 +3*3 18
+ ;--------------------------
+ ;21 19 37
+
+ end
+
+; vim:set ts=8 noet nowrap
|