Table for RAM used with memory map 1 table selected.
By Dwight ElveyHow to read the table
The RAM in the M20 is divided into 16K byte blocks. These blocks can be seen by the processor as existing at more than one logical address (<segment>Offset). Beside being at different locations, the M20 can treat Code or Instruction memory as different physical memory than Data memory. This means that within one segment, the processor can see up to 64K of Instruction memory and 64K of different, physical, Data memory.
This requires one to think about how the memory is being allocated and used. Instruction fetching is obvious but Instruction relative fetches are also from Instruction memory. All other fetch and store operation take place in Data memory. An example of how this can be used is in BASIC. The program loads BASIC, as Data, at <6>0000 but executes, as Instructions, at <1>0000, using the physical memory located on the mother board. BASIC can then use free areas of memory on the mother board for Data memory, where the BASIC's programs and Data are stored.
In the table below I try to organize the memory access so that a programmer can understand where and how different 16K blocks of RAM are located. The addresses on the left are those that the processor uses in code. The next line describes how that block is seen by the processor and the physical location of that block.
Ram Physical location:- DRAM0 = motherboard
- DRAM1 = first slot from keyboard end
- DRAM2 = second slot from keyboard end
- DRAM3 = third slot from keyboard end
- ROM0 = ROM
- D = Data memory
- I = Instruction memory
- D,I = Data or Instruction memory
The Table
8 Colors 128K <0>0000 D DRAM0 4000 I DRAM0 4000 <8>0000 D DRAM0 18000 I DRAM0 8000 <0>4000 D DRAM2 0000 I DRAM0 8000 <8>4000 D DRAM0 1C000 I DRAM0 C000 <0>8000 D DRAM2 4000 I DRAM0 C000 <8>8000 D DRAM1 10000 I DRAM1 8000 <0>C000 D DRAM3 0000 I DRAM0 10000 <8>C000 D DRAM1 14000 I DRAM1 C000 <1>0000 D DRAM0 14000 I DRAM0 8000 <9>0000 D DRAM0 18000 I DRAM0 18000 <1>4000 D DRAM0 18000 I DRAM0 C000 <9>4000 D DRAM0 1C000 I DRAM0 1C000 <1>8000 D DRAM0 1C000 I DRAM0 10000 <9>8000 D DRAM1 10000 I DRAM1 10000 <1>C000 D DRAM1 4000 I None <9>C000 D DRAM1 14000 I DRAM1 14000 <2>0000 D DRAM0 14000 I DRAM0 14000 <A>0000 D DRAM0 8000 I DRAM0 8000 <2>4000 D DRAM0 18000 I DRAM0 18000 <A>4000 D DRAM0 C000 I DRAM0 C000 <2>8000 D DRAM0 1C000 I DRAM0 1C000 <A>8000 D DRAM1 8000 I DRAM1 8000 <2>C000 D DRAM1 4000 I DRAM1 4000 <A>C000 D DRAM1 C000 I DRAM1 C000 <3>0000 D DRAM0 0000 I DRAM0 0000 <B>0000 D DRAM1 18000 I DRAM1 18000 <3>4000 D DRAM1 0000 I DRAM1 0000 <B>4000 D DRAM1 1C000 I DRAM1 1C000 <3>8000 D DRAM2 0000 I DRAM2 0000 <B>8000 D DRAM2 4000 I DRAM2 4000 <3>C000 D DRAM3 0000 I DRAM3 0000 <B>C000 D DRAM2 8000 I DRAM2 8000 <4>0000 D ROM0 0000 I ROM0 0000 <C>0000 D DRAM2 C000 I DRAM2 C000 <4>4000 D ROM0 10000 I ROM0 10000 <C>4000 D DRAM2 10000 I DRAM2 10000 <4>8000 D ROM0 14000 I ROM0 14000 <C>8000 D DRAM2 14000 I DRAM2 14000 <4>C000 D ROM0 18000 I ROM0 18000 <C>C000 D DRAM2 18000 I DRAM2 18000 <5>0000 D DRAM0 8000 I ROM0 10000 <D>0000 D DRAM2 1C000 I DRAM2 1C000 <5>4000 D DRAM0 C000 I ROM0 14000 <D>4000 D DRAM3 0000 I DRAM3 0000 <5>8000 D DRAM0 10000 I ROM0 18000 <D>8000 D DRAM3 4000 I DRAM3 4000 <5>C000 D None I SRAM0 0000 <D>C000 D DRAM3 8000 I DRAM3 8000 <6>0000 D DRAM0 8000 I DRAM0 8000 <E>0000 D DRAM3 C000 I DRAM3 C000 <6>4000 D DRAM0 C000 I DRAM0 C000 <E>4000 D DRAM3 10000 I DRAM3 10000 <6>8000 D DRAM0 10000 I DRAM0 10000 <E>8000 D DRAM3 14000 I DRAM3 14000 <6>C000 D None I None <E>C000 D DRAM3 18000 I DRAM3 18000 <7>0000 D ROM0 0000 I ROM0 0000 <F>0000 D DRAM3 1C000 I DRAM3 1C000 <7>4000 D ROM0 10000 I ROM0 10000 <F>4000 D DRAM3 0000 I DRAM3 0000 <7>8000 D ROM0 14000 I ROM0 14000 <F>8000 D DRAM3 4000 I DRAM3 4000 <7>C000 D DRAM3 4000 I DRAM3 4000 <F>C000 D DRAM3 8000 I DRAM3 8000 8 Colors 32K <0>0000 D DRAM0 4000 I DRAM0 4000 <8>0000 D DRAM0 18000 I DRAM0 8000 <0>4000 D DRAM2 0000 I DRAM0 8000 <8>4000 D DRAM0 1C000 I DRAM0 C000 <0>8000 D DRAM2 4000 I DRAM0 C000 <8>8000 D DRAM3 4000 I DRAM2 4000 <0>C000 D DRAM3 0000 I DRAM0 10000 <8>C000 D None I DRAM3 0000 <1>0000 D DRAM0 14000 I DRAM0 8000 <9>0000 D DRAM0 18000 I DRAM0 18000 <1>4000 D DRAM0 18000 I DRAM0 C000 <9>4000 D DRAM0 1C000 I DRAM0 1C000 <1>8000 D DRAM0 1C000 I DRAM0 10000 <9>8000 D DRAM3 4000 I DRAM3 4000 <1>C000 D DRAM1 4000 I None <9>C000 D None I None <2>0000 D DRAM0 14000 I DRAM0 14000 <A>0000 D DRAM0 8000 I DRAM0 8000 <2>4000 D DRAM0 18000 I DRAM0 18000 <A>4000 D DRAM0 C000 I DRAM0 C000 <2>8000 D DRAM0 1C000 I DRAM0 1C000 <A>8000 D DRAM2 4000 I DRAM2 4000 <2>C000 D DRAM1 4000 I DRAM1 4000 <A>C000 D DRAM3 0000 I DRAM3 0000 <3>0000 D DRAM0 0000 I DRAM0 0000 <B>0000 D None I None <3>4000 D DRAM1 0000 I DRAM1 0000 <B>4000 D None I None <3>8000 D DRAM2 0000 I DRAM2 0000 <B>8000 D None I None <3>C000 D DRAM3 0000 I DRAM3 0000 <B>C000 D None I None <4>0000 D ROM0 0000 I ROM0 0000 <C>0000 D None I None <4>4000 D ROM0 10000 I ROM0 10000 <C>4000 D None I None <4>8000 D ROM0 14000 I ROM0 14000 <C>8000 D None I None <4>C000 D ROM0 18000 I ROM0 18000 <C>C000 D None I None <5>0000 D DRAM0 8000 I ROM0 10000 <D>0000 D None I None <5>4000 D DRAM0 C000 I ROM0 14000 <D>4000 D None I None <5>8000 D DRAM0 10000 I ROM0 18000 <D>8000 D None I None <5>C000 D SRAM0 0000 I SRAM0 0000 <D>C000 D None I None <6>0000 D DRAM0 8000 I DRAM0 8000 <E>0000 D None I None <6>4000 D DRAM0 C000 I DRAM0 C000 <E>4000 D None I None <6>8000 D DRAM0 10000 I DRAM0 10000 <E>8000 D None I None <6>C000 D None I None <E>C000 D None I None <7>0000 D ROM0 0000 I ROM0 0000 <F>0000 D None I None <7>4000 D ROM0 10000 I ROM0 10000 <F>4000 D None I None <7>8000 D ROM0 14000 I ROM0 14000 <F>8000 D None I None <7>C000 D DRAM3 4000 I DRAM3 4000 <F>C000 D None I None B/W 128K <0>0000 D DRAM0 4000 I DRAM0 4000 <8>0000 D DRAM0 18000 I DRAM0 8000 <0>4000 D DRAM1 4000 I DRAM0 8000 <8>4000 D DRAM0 1C000 I DRAM0 C000 <0>8000 D DRAM2 0000 I DRAM0 C000 <8>8000 D DRAM1 C000 I DRAM1 4000 <0>C000 D DRAM2 4000 I DRAM0 10000 <8>C000 D DRAM1 10000 I DRAM1 8000 <1>0000 D DRAM0 14000 I DRAM0 8000 <9>0000 D DRAM0 18000 I DRAM0 18000 <1>4000 D DRAM0 18000 I DRAM0 C000 <9>4000 D DRAM0 1C000 I DRAM0 1C000 <1>8000 D DRAM0 1C000 I DRAM0 10000 <9>8000 D DRAM1 C000 I DRAM1 C000 <1>C000 D DRAM1 0000 I None <9>C000 D DRAM1 10000 I DRAM1 10000 <2>0000 D DRAM0 14000 I DRAM0 14000 <A>0000 D DRAM0 8000 I DRAM0 8000 <2>4000 D DRAM0 18000 I DRAM0 18000 <A>4000 D DRAM0 C000 I DRAM0 C000 <2>8000 D DRAM0 1C000 I DRAM0 1C000 <A>8000 D DRAM1 4000 I DRAM1 4000 <2>C000 D DRAM1 0000 I DRAM1 0000 <A>C000 D DRAM1 8000 I DRAM1 8000 <3>0000 D DRAM0 0000 I DRAM0 0000 <B>0000 D DRAM1 14000 I DRAM1 14000 <3>4000 D None I None <B>4000 D DRAM1 18000 I DRAM1 18000 <3>8000 D None I None <B>8000 D DRAM1 1C000 I DRAM1 1C000 <3>C000 D None I None <B>C000 D DRAM2 0000 I DRAM2 0000 <4>0000 D ROM0 0000 I ROM0 0000 <C>0000 D DRAM2 4000 I DRAM2 4000 <4>4000 D DRAM3 0000 I None <C>4000 D DRAM2 8000 I DRAM2 8000 <4>8000 D DRAM3 4000 I None <C>8000 D DRAM2 C000 I DRAM2 C000 <4>C000 D None I None <C>C000 D DRAM2 10000 I DRAM2 10000 <5>0000 D DRAM0 8000 I ROM0 10000 <D>0000 D DRAM2 14000 I DRAM2 14000 <5>4000 D DRAM0 C000 I ROM0 14000 <D>4000 D DRAM2 18000 I DRAM2 18000 <5>8000 D DRAM0 10000 I ROM0 18000 <D>8000 D DRAM2 1C000 I DRAM2 1C000 <5>C000 D SRAM0 0000 I SRAM0 0000 <D>C000 D DRAM3 0000 I DRAM3 0000 <6>0000 D DRAM0 8000 I DRAM0 8000 <E>0000 D DRAM3 4000 I DRAM3 4000 <6>4000 D DRAM0 C000 I DRAM0 C000 <E>4000 D DRAM3 8000 I DRAM3 8000 <6>8000 D DRAM0 10000 I DRAM0 10000 <E>8000 D DRAM3 C000 I DRAM3 C000 <6>C000 D None I None <E>C000 D DRAM3 10000 I DRAM3 10000 <7>0000 D ROM0 0000 I ROM0 0000 <F>0000 D DRAM3 14000 I DRAM3 14000 <7>4000 D ROM0 10000 I ROM0 10000 <F>4000 D DRAM3 18000 I DRAM3 18000 <7>8000 D ROM0 14000 I ROM0 14000 <F>8000 D DRAM3 1C000 I DRAM3 1C000 <7>C000 D ROM0 18000 I ROM0 18000 <F>C000 D DRAM3 0000 I DRAM3 0000 4 Colors 128K <0>0000 D DRAM0 4000 I DRAM0 4000 <8>0000 D DRAM0 18000 I DRAM0 8000 <0>4000 D DRAM2 0000 I DRAM0 8000 <8>4000 D DRAM0 1C000 I DRAM0 C000 <0>8000 D DRAM2 4000 I DRAM0 C000 <8>8000 D DRAM1 10000 I DRAM1 8000 <0>C000 D DRAM3 0000 I DRAM0 10000 <8>C000 D DRAM1 14000 I DRAM1 C000 <1>0000 D DRAM0 14000 I DRAM0 8000 <9>0000 D DRAM0 18000 I DRAM0 18000 <1>4000 D DRAM0 18000 I DRAM0 C000 <9>4000 D DRAM0 1C000 I DRAM0 1C000 <1>8000 D DRAM0 1C000 I DRAM0 10000 <9>8000 D DRAM1 10000 I DRAM1 10000 <1>C000 D DRAM1 4000 I None <9>C000 D DRAM1 14000 I DRAM1 14000 <2>0000 D DRAM0 14000 I DRAM0 14000 <A>0000 D DRAM0 8000 I DRAM0 8000 <2>4000 D DRAM0 18000 I DRAM0 18000 <A>4000 D DRAM0 C000 I DRAM0 C000 <2>8000 D DRAM0 1C000 I DRAM0 1C000 <A>8000 D DRAM1 8000 I DRAM1 8000 <2>C000 D DRAM1 4000 I DRAM1 4000 <A>C000 D DRAM1 C000 I DRAM1 C000 <3>0000 D DRAM0 0000 I DRAM0 0000 <B>0000 D DRAM1 18000 I DRAM1 18000 <3>4000 D DRAM1 0000 I DRAM1 0000 <B>4000 D DRAM1 1C000 I DRAM1 1C000 <3>8000 D None I None <B>8000 D DRAM2 0000 I DRAM2 0000 <3>C000 D None I None <B>C000 D DRAM2 4000 I DRAM2 4000 <4>0000 D ROM0 0000 I ROM0 0000 <C>0000 D DRAM2 8000 I DRAM2 8000 <4>4000 D ROM0 10000 I ROM0 10000 <C>4000 D DRAM2 C000 I DRAM2 C000 <4>8000 D ROM0 14000 I ROM0 14000 <C>8000 D DRAM2 10000 I DRAM2 10000 <4>C000 D ROM0 18000 I ROM0 18000 <C>C000 D DRAM2 14000 I DRAM2 14000 <5>0000 D DRAM0 8000 I ROM0 10000 <D>0000 D DRAM2 18000 I DRAM2 18000 <5>4000 D DRAM0 C000 I ROM0 14000 <D>4000 D DRAM2 1C000 I DRAM2 1C000 <5>8000 D DRAM0 10000 I ROM0 18000 <D>8000 D DRAM3 0000 I DRAM3 0000 <5>C000 D SRAM0 0000 I SRAM0 0000 <D>C000 D DRAM3 4000 I DRAM3 4000 <6>0000 D DRAM0 8000 I DRAM0 8000 <E>0000 D DRAM3 8000 I DRAM3 8000 <6>4000 D DRAM0 C000 I DRAM0 C000 <E>4000 D DRAM3 C000 I DRAM3 C000 <6>8000 D DRAM0 10000 I DRAM0 10000 <E>8000 D DRAM3 10000 I DRAM3 10000 <6>C000 D None I None <E>C000 D DRAM3 14000 I DRAM3 14000 <7>0000 D ROM0 0000 I ROM0 0000 <F>0000 D DRAM3 18000 I DRAM3 18000 <7>4000 D ROM0 10000 I ROM0 10000 <F>4000 D DRAM3 1C000 I DRAM3 1C000 <7>8000 D ROM0 14000 I ROM0 14000 <F>8000 D DRAM3 0000 I DRAM3 0000 <7>C000 D DRAM3 4000 I ROM0 18000 <F>C000 D DRAM3 4000 I DRAM3 4000 4 Colors 32K <0>0000 D DRAM0 4000 I DRAM0 4000 <8>0000 D DRAM0 18000 I DRAM0 8000 <0>4000 D DRAM2 0000 I DRAM0 8000 <8>4000 D DRAM0 1C000 I DRAM0 C000 <0>8000 D DRAM2 4000 I DRAM0 C000 <8>8000 D DRAM3 0000 I DRAM2 0000 <0>C000 D DRAM3 0000 I DRAM0 10000 <8>C000 D DRAM3 4000 I DRAM2 4000 <1>0000 D DRAM0 14000 I DRAM0 8000 <9>0000 D DRAM0 18000 I DRAM0 18000 <1>4000 D DRAM0 18000 I DRAM0 C000 <9>4000 D DRAM0 1C000 I DRAM0 1C000 <1>8000 D DRAM0 1C000 I DRAM0 10000 <9>8000 D DRAM3 0000 I DRAM3 0000 <1>C000 D DRAM1 4000 I None <9>C000 D DRAM3 4000 I DRAM3 4000 <2>0000 D DRAM0 14000 I DRAM0 14000 <A>0000 D DRAM0 8000 I DRAM0 8000 <2>4000 D DRAM0 18000 I DRAM0 18000 <A>4000 D DRAM0 C000 I DRAM0 C000 <2>8000 D DRAM0 1C000 I DRAM0 1C000 <A>8000 D DRAM2 0000 I DRAM2 0000 <2>C000 D DRAM1 4000 I DRAM1 4000 <A>C000 D DRAM2 4000 I DRAM2 4000 <3>0000 D DRAM0 0000 I DRAM0 0000 <B>0000 D None I None <3>4000 D DRAM1 0000 I DRAM1 0000 <B>4000 D None I None <3>8000 D None I None <B>8000 D None I None <3>C000 D None I None <B>C000 D None I None <4>0000 D ROM0 0000 I ROM0 0000 <C>0000 D None I None <4>4000 D ROM0 10000 I ROM0 10000 <C>4000 D None I None <4>8000 D ROM0 14000 I ROM0 14000 <C>8000 D None I None <4>C000 D ROM0 18000 I ROM0 18000 <C>C000 D None I None <5>0000 D DRAM0 8000 I ROM0 10000 <D>0000 D None I None <5>4000 D DRAM0 C000 I ROM0 14000 <D>4000 D None I None <5>8000 D DRAM0 10000 I ROM0 18000 <D>8000 D None I None <5>C000 D SRAM0 0000 I SRAM0 0000 <D>C000 D None I None <6>0000 D DRAM0 8000 I DRAM0 8000 <E>0000 D None I None <6>4000 D DRAM0 C000 I DRAM0 C000 <E>4000 D None I None <6>8000 D DRAM0 10000 I DRAM0 10000 <E>8000 D None I None <6>C000 D None I None <E>C000 D None I None <7>0000 D ROM0 0000 I ROM0 0000 <F>0000 D None I None <7>4000 D ROM0 10000 I ROM0 10000 <F>4000 D None I None <7>8000 D ROM0 14000 I ROM0 14000 <F>8000 D None I None <7>C000 D ROM0 18000 I ROM0 18000 <F>C000 D None I None No Expansion <0>0000 D DRAM0 4000 I DRAM0 4000 <8>0000 D DRAM0 18000 I DRAM0 8000 <0>4000 D None I DRAM0 8000 <8>4000 D DRAM0 1C000 I DRAM0 C000 <0>8000 D None I DRAM0 C000 <8>8000 D None I None <0>C000 D None I DRAM0 10000 <8>C000 D None I None <1>0000 D DRAM0 14000 I DRAM0 8000 <9>0000 D DRAM0 18000 I DRAM0 18000 <1>4000 D DRAM0 18000 I DRAM0 C000 <9>4000 D DRAM0 1C000 I DRAM0 1C000 <1>8000 D DRAM0 1C000 I DRAM0 10000 <9>8000 D None I None <1>C000 D DRAM0 10000 I None <9>C000 D None I None <2>0000 D DRAM0 14000 I DRAM0 14000 <A>0000 D DRAM0 8000 I DRAM0 8000 <2>4000 D DRAM0 18000 I DRAM0 18000 <A>4000 D DRAM0 C000 I DRAM0 C000 <2>8000 D DRAM0 1C000 I DRAM0 1C000 <A>8000 D None I None <2>C000 D DRAM0 10000 I None <A>C000 D None I None <3>0000 D DRAM0 0000 I DRAM0 0000 <B>0000 D None I None <3>4000 D None I None <B>4000 D None I None <3>8000 D None I None <B>8000 D None I None <3>C000 D None I None <B>C000 D None I None <4>0000 D ROM0 0000 I ROM0 0000 <C>0000 D None I None <4>4000 D ROM0 10000 I ROM0 10000 <C>4000 D None I None <4>8000 D ROM0 14000 I ROM0 14000 <C>8000 D None I None <4>C000 D ROM0 18000 I ROM0 18000 <C>C000 D None I None <5>0000 D DRAM0 8000 I ROM0 10000 <D>0000 D None I None <5>4000 D DRAM0 C000 I ROM0 14000 <D>4000 D None I None <5>8000 D DRAM0 10000 I ROM0 18000 <D>8000 D None I None <5>C000 D SRAM0 0000 I SRAM0 0000 <D>C000 D None I None <6>0000 D DRAM0 8000 I DRAM0 8000 <E>0000 D None I None <6>4000 D DRAM0 C000 I DRAM0 C000 <E>4000 D None I None <6>8000 D DRAM0 10000 I DRAM0 10000 <E>8000 D None I None <6>C000 D None I None <E>C000 D None I None <7>0000 D ROM0 0000 I ROM0 0000 <F>0000 D None I None <7>4000 D ROM0 10000 I ROM0 10000 <F>4000 D None I None <7>8000 D ROM0 14000 I ROM0 14000 <F>8000 D None I None <7>C000 D ROM0 18000 I ROM0 18000 <F>C000 D None I None B/W 32K <0>0000 D DRAM0 4000 I DRAM0 4000 <8>0000 D DRAM0 18000 I DRAM0 8000 <0>4000 D DRAM1 4000 I DRAM0 8000 <8>4000 D DRAM0 1C000 I DRAM0 C000 <0>8000 D DRAM2 0000 I DRAM0 C000 <8>8000 D DRAM2 4000 I DRAM1 4000 <0>C000 D DRAM2 4000 I DRAM0 10000 <8>C000 D DRAM3 0000 I DRAM2 0000 <1>0000 D DRAM0 14000 I DRAM0 8000 <9>0000 D DRAM0 18000 I DRAM0 18000 <1>4000 D DRAM0 18000 I DRAM0 C000 <9>4000 D DRAM0 1C000 I DRAM0 1C000 <1>8000 D DRAM0 1C000 I DRAM0 10000 <9>8000 D DRAM2 4000 I DRAM2 4000 <1>C000 D DRAM1 0000 I None <9>C000 D DRAM3 0000 I DRAM3 0000 <2>0000 D DRAM0 14000 I DRAM0 14000 <A>0000 D DRAM0 8000 I DRAM0 8000 <2>4000 D DRAM0 18000 I DRAM0 18000 <A>4000 D DRAM0 C000 I DRAM0 C000 <2>8000 D DRAM0 1C000 I DRAM0 1C000 <A>8000 D DRAM1 4000 I DRAM1 4000 <2>C000 D DRAM1 0000 I DRAM1 0000 <A>C000 D DRAM2 0000 I DRAM2 0000 <3>0000 D DRAM0 0000 I DRAM0 0000 <B>0000 D DRAM3 4000 I DRAM3 4000 <3>4000 D None I None <B>4000 D None I None <3>8000 D None I None <B>8000 D None I None <3>C000 D None I None <B>C000 D None I None <4>0000 D ROM0 0000 I ROM0 0000 <C>0000 D DRAM3 4000 I None <4>4000 D DRAM3 0000 I ROM0 10000 <C>4000 D None I None <4>8000 D DRAM3 4000 I ROM0 14000 <C>8000 D None I None <4>C000 D None I ROM0 18000 <C>C000 D None I None <5>0000 D DRAM0 8000 I ROM0 10000 <D>0000 D None I None <5>4000 D DRAM0 C000 I ROM0 14000 <D>4000 D None I None <5>8000 D DRAM0 10000 I ROM0 18000 <D>8000 D None I None <5>C000 D SRAM0 0000 I SRAM0 0000 <D>C000 D None I None <6>0000 D DRAM0 8000 I DRAM0 8000 <E>0000 D None I None <6>4000 D DRAM0 C000 I DRAM0 C000 <E>4000 D None I None <6>8000 D DRAM0 10000 I DRAM0 10000 <E>8000 D None I None <6>C000 D None I None <E>C000 D None I None <7>0000 D ROM0 0000 I ROM0 0000 <F>0000 D None I None <7>4000 D ROM0 10000 I ROM0 10000 <F>4000 D None I None <7>8000 D ROM0 14000 I ROM0 14000 <F>8000 D None I None <7>C000 D ROM0 18000 I ROM0 18000 <F>C000 D None I None
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