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RLEWB decompression routine does not work for MSX-DOS #3

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mvac7 opened this issue Jan 6, 2022 · 1 comment

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mvac7 commented Jan 6, 2022 •

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Several system constants stored in the BIOS are read in the decompression routine.
They are not visible in the memory layout in MSX-DOS mode.

Requires the use of the RDSLT (000Ch) function.

mvac7 added the bug label

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mvac7 commented Jan 6, 2022

; MSX-DOS  
  ld   HL,#0x002D   ;MSXVER=002D MSX version number (0=MSX,1=MSX2,2=MSX2+,3=TurboR)
  ld   A,(#EXPTBL)  ;EXPTBL=FCC1 main BIOS-ROM slot address
  call RDSLT        ;Reads the value of an address in another slot

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