mirror of
https://github.com/uffejakobsen/acme.git
synced 2024-11-09 09:11:44 +00:00
docs only
git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@263 4df02467-bbd4-4a76-a152-e7ce94205b78
This commit is contained in:
parent
9d637eee25
commit
8f432f6aa7
@ -102,39 +102,50 @@ of the 65c02. Among the improvements are:
|
||||
|
||||
New mnemonics
|
||||
-------------
|
||||
02 cop imm8
|
||||
6b rtl
|
||||
82 brl rel16
|
||||
02 cop imm8 coprocessor operation
|
||||
6b rtl return long (fetches 24-bit address from stack)
|
||||
82 brl rel16 branch long (16-bit offset)
|
||||
|
||||
0b phd
|
||||
2b pld
|
||||
4b phk
|
||||
62 per rel16
|
||||
8b phb
|
||||
ab plb
|
||||
d4 pei (dp)
|
||||
f4 pea abs16
|
||||
0b phd push direct page register
|
||||
4b phk push program bank register
|
||||
8b phb push data bank register
|
||||
62 per rel16 push effective relative address
|
||||
d4 pei (dp) push effective indirect address
|
||||
f4 pea abs16 push effective absolute address
|
||||
|
||||
1b tcs
|
||||
3b tsc
|
||||
5b tcd
|
||||
7b tdc
|
||||
9b txy
|
||||
bb tyx
|
||||
2b pld pull direct page register
|
||||
ab plb pull data bank register
|
||||
|
||||
eb xba
|
||||
fb xce
|
||||
1b tcs transfer C to stack pointer
|
||||
3b tsc transfer stack pointer to C
|
||||
5b tcd transfer C to direct page register
|
||||
7b tdc transfer direct page register to C
|
||||
('C' means the whole 16-bit accumulator, even in 8-bit mode)
|
||||
9b txy transfer X to Y
|
||||
bb tyx transfer Y to X
|
||||
|
||||
42 wdm
|
||||
eb xba exchange high and low bytes of accumulator
|
||||
fb xce exchange Carry and Emulation bits
|
||||
|
||||
44 mvp src, dst
|
||||
54 mvn src, dst
|
||||
c2 rep #imm8 clear bits in status register
|
||||
e2 sep #imm8 set bits in status register
|
||||
|
||||
c2 rep #imm8
|
||||
e2 sep #imm8
|
||||
cb wai wait for interrupt
|
||||
db stp wait for reset
|
||||
|
||||
cb wai
|
||||
db stp
|
||||
42 wdm (reserved for future expansion)
|
||||
|
||||
block transfers:
|
||||
44 mvp src, dst move previous (decrementing addresses)
|
||||
54 mvn src, dst move next (incrementing addresses)
|
||||
the arguments are bank numbers. block size minus one must be in 16-bit
|
||||
accumulator. X holds source address, Y holds target address.
|
||||
after these instructions, data bank register is set to "dst".
|
||||
if blocks overlap:
|
||||
when moving a block to a higher address, use mvp and put the highest
|
||||
addresses in X/Y.
|
||||
when moving a block to a lower address, use mvn and put the lowest
|
||||
adresses in X/Y.
|
||||
|
||||
New addressing modes for existing mnemonics
|
||||
-------------------------------------------
|
||||
|
Loading…
Reference in New Issue
Block a user