G007 hires unit - documentation wanted

[1024MAK]

Thank you

Mark

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Code: Select all

' // Get Byte from G007 cards.
If G_Card = eHiResG007 Then
      
    If addr >= &HC00 And addr <= &HCFF Then
     peekb = MEM(addr + 8192): Exit Function
    End If

    If (addr < 256 Or (addr >= 512 And addr < 768)) And (intI And 1) Then
     peekb = MEM(addr + 8192): Exit Function
    End If
  

Basic monitor patch:
If /RD (read data) is used in the $C00/$CFF memory segment, the data is peeked in the G007 ROM...[$2C00/$2CFF]
The same for the 512 / 768 segment. [$2200/$2300]

The patch in the G007 rom, include this exotic code, and add "Uncharted" (not used in the disassembled code).
Memotch use this ram offset redirection in the Memotext and his Centronics card to patch the Basic monitor ROM.

Zx Rom dump: [0-$2000]

Rom_G007_Patched.zip

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