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GetBank

Syntax

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#include <memorybank.bas>

PRINT "Current bank at $c000: ";GetBank()

Description

Returns the memory bank located at $c000 based on the system variable BANKM.

Only works on 128K and compatible models.

Danger: If our program exceeds the address $c000 it may cause problems, use this function at your own risk.

Memory banks

  • $c000 > Bank 0 to Bank 7
  • $8000 > Bank 2 (fixed)
  • $4000 > Bank 5 (screen)
  • $0000 > ROM

Banks 2 and 5 are permanently fixed at addresses $8000 and $4000, so it is not common to use them. Banks 1, 3, 5 and 7 are banks in contention with the ULA, their use is not recommended in processes requiring maximum speed.

Examples

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#include "memorybank.bas"

DIM n AS UByte

' Fill banks with data
FOR n = 0 TO 7
    SetBank(n)
    PRINT AT n,0;"Bank: ";n;
    POKE $c000,n
    PRINT " > ";GetBank();
NEXT n

' Read banks
FOR n = 0 TO 7
    SetBank(n)
    PRINT AT n,15;PEEK($c000);
NEXT n

See also