Difference between revisions of "83Plus:BCALLs:8051"

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m (Destroys: linkie)
(Destroys: yes, it trashes the first byte of OP1 as well)
Line 17: Line 17:
 
* All registers preserved
 
* All registers preserved
 
* Destroys contents of memory at [[83Plus:RAM:8100|8100]] (ramCode)
 
* Destroys contents of memory at [[83Plus:RAM:8100|8100]] (ramCode)
 +
* [[83Plus:RAM:8478|OP1]]
  
 
== Comments ==
 
== Comments ==

Revision as of 19:11, 30 March 2005

Synopsis

Official Name: LoadAIndPaged

BCALL Address: 8051

Reads a byte into register A on page A at address HL.

Inputs

  • A = page
  • HL = address

Outputs

  • A = byte read

Destroys

  • All registers preserved
  • Destroys contents of memory at 8100 (ramCode)
  • OP1

Comments

Simple enough to implement yourself if speed is important.

Example

 ld     a,0
 ld     hl,4000
 B_CALL LoadAIndPaged  ;should return a=DB (at least on OS version 1.18)