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 a few options to display and navigate the memory contents:

• Decimal: Turns on or off the decimal display (off, by default). When turned off, memory addresses and content are displayed with decimal numbers; otherwise, they are hexadecimal.
• 2 Columns: Depending on this option, you can display one or two columns in a single row (two columns by default).
• Chars: This toggles the display of the character view for a particular memory section (on, by default).
• 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

ZX Spectrum 48K

This model supports only the 64K view.

ZX Spectrum 128K

The ROM 0 and ROM 1 segments allow you to access the two ROM pages (16K each). The RAM banks (16K each) can be selected with one of the BANK 0 or BANK 7 segments.

ZX Spectrum +2E, +3E

The ROM 0… ROM 3 segments allow you to access the four ROM pages (16K each). The RAM banks (16K each) can be selected with one of the BANK 0 … BANK 7 segments.

Cambridge Z88

You can access one of the available 256 banks (16K each) by selecting the bank’s index from the dropdown.

ZX Spectrum Next

The dropdown provides these options to access memory segments:

• IDs from 00 to DF (000 to 224 in decimal view) to select an 8K RAM bank. The view does not support displaying them as 16K banks.
• M0, M1 … MF: The 16 DivMMC RAM banks (8K each)
• NROM0 … NROM3: The ROM pages of the ZX Next OS (16K each)
• ALTR0, ALTR1: The alternate ROM pages (16K each)
• DivMR: The DivMMC ROM (8K)