Displaying the Memory Contents

You can view the contents of the memory with the IDE | Show Machine Memory menu command that displays the contents of the full 64K memory addressable by Z80:

While the ZX Spectrum 48K does not support paging, other models do. When you use them, you can choose to show only the contents of a particular bank:

Some models (such as ZX Spectrum Next or Cambridge Z88) offer you many banks to choose from:

Display Options

The Memory View provides several options to display and navigate the memory contents:

• Decimal: Turns on or off the decimal display (off, by default). When turned on, memory addresses and content are displayed with decimal numbers; otherwise, they are hexadecimal.
• View: A dropdown menu to select the memory layout display mode:
  • 8B / 1 col: Display 8 bytes per row in a single column (one dump section).
  • 8B / 2 col: Display 8 bytes per row in two columns (two dump sections side by side). This is the default mode.
  • 16B / 1 col: Display 16 bytes per row in a single column.
• Chars: This toggles the display of the character view for a particular memory section (on, by default). When enabled, each byte’s character representation is shown alongside the hex dump. Hovering over a byte in the hex area highlights the corresponding character in the character section with a border.
• Bank: This option (on, by default) allows you to turn the display of bank labels on or off in front of memory addresses. This option is available only for models that support memory paging.
• Go To: Type an address into this box and press Enter to jump to the particular address. Though memory sections are aligned to 8-byte boundaries when jumping to a new address, the designated address’s content flashes for about 3 seconds to let you identify the jump target. In decimal mode, you can type decimal addresses; otherwise, use hexadecimal addresses.

Banked Memory Views

A new switch, 64K View, is displayed in the second header row when your model supports memory paging. It is turned on by default, and the current 64K memory (according to the current memory page settings) is displayed. When you turn this option off, you can choose the bank to display (ROM pages or RAM banks, depending on the machine type) from the Select bank dropdown. The Memory View will display only the contents of that memory even if that segment is not paged in.

Edit Memory Content

When you hover the mouse over a memory address that represents RAM, you can edit its content by right-clicking it:

You can specify the new value with decimal numbers, hexadecimal numbers (use the $ prefix), or binary numbers (use the % prefix). You can use spaces to group digits; the IDE will remove them.

If the specified value cannot be parsed, a red border marks the invalid state. Clicking the Set button or pressing Enter will set the contents to the specified value.

With this dialog, you can write 1, 2, 3, or 4 consecutive bytes into the memory (select the size from the dropdown). The given value is entered as a little-endian value (LSB first). However, checking the Big-endian write flag stores the MSB first. This flag is available only for 2, 3, and 4-byte values.

Machine-Specific Memory Partitions

Every partition has one name and one description. The name is what identifies it: it is what the bank column shows, what a breakpoint is listed under, and what the bp-* commands accept in a partition-qualified address such as bp-set r1:$32ac. The description is the longer form a chooser spells out beside the name; it is never typed and never appears in a breakpoint key.

Names are accepted case-insensitively, so r1 and R1 are the same partition.

ZX Spectrum 48K

No partitions: this model supports only the 64K view.

ZX Spectrum 128K

ZX Spectrum +2E, +3E

Cambridge Z88

The Z88 has no ROM partitions: its ROM is a card in slot 0 rather than a fixed page.

ZX Spectrum Next

The bank chooser heads each group once rather than repeating it on every entry, so a DivMMC RAM bank appears as M3 under a DivMMC RAM heading. Hovering any entry names it in full.