Difference between revisions of "Keymap High Address Register"

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(core 3.0 changes/refresh)
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{{NextRegister
 
{{NextRegister
 
|Number=$28
 
|Number=$28
|Readable=No
+
|Readable=Yes
 
|Writable=Yes
 
|Writable=Yes
|ShortDesc=High address of Keymap (MSB in bit 0)
+
|ShortDesc=High address of Keymap (MSB in bit 0), read palette value from $44
 
}}
 
}}
Bits 7-1 are reserved, must be 0. Bit 0 is MSB of keymap address.
+
Write:
 +
  bits 7:1 = Reserved, must be 0
 +
  bit 0 = MSB keymap address
 +
 
 +
Read:
 +
  bits 7:0 = Stored palette value from {{NextRegNo|$44}}

Revision as of 13:56, 11 November 2019

Number $28
Readable Yes
Writable Yes
Short Description High address of Keymap (MSB in bit 0), read palette value from $44

Write:

 bits 7:1 = Reserved, must be 0
 bit 0 = MSB keymap address

Read:

 bits 7:0 = Stored palette value from Enhanced ULA Palette Extension ($44)