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zesarux.md

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This document describes the interaction with ZEsarUX.

The debugger connects to ZEsarUX locally at 127.0.0.1 on port 10000.

  • any response of "command>·" indicates CPU is running
  • any response of "command@cpu-step>·" indicates CPU is stopped and in step mode

Note: · = space

Connect()

Version

Send get-version
Receive 5.1-SN
command>·

Count breakpoints available

Send get-breakpoints
Receive Breakpoints: On
Disabled 1: PC=000Dh
Disabled 2: None
...
Disabled 99: None
Disabled 100: None
command>·

Set debug settings

Send set-debug-settings 40
Receive command>· 
Bit 0: show all cpu registers on cpu stepping or only pc+opcode.
Bit 1: show 8 next opcodes on cpu stepping.
Bit 2: Do not add a L preffix when searching source code labels.
Bit 3: Show bytes when debugging opcodes.
Bit 4: Repeat last command only by pressing enter.
Bit 5: Step over interrupt when running cpu-step, cpu-step-over and run verbose. It's the same setting as Step Over Interrupt on menu

Disable each individual breakpoint

Send disable-breakpoint 1 - repeated for each breakpoint
Receive command>·
or Error. You must enable breakpoints first

Set memory zone to the 64k Spectrum memory

Send set-memory-zone -1
Receive command>· 
Zone: -1 Name: Mapped memory
Zone: 0 Name: Machine RAM Size: 131072 R/W: 3
Zone: 1 Name: Machine ROM Size: 32768 R/W: 1
Zone: 2 Name: Diviface eeprom Size: 8192 R/W: 3
Zone: 3 Name: Diviface ram Size: 131072 R/W: 3

Enable breakpoints

Send enable-breakpoints
Receive command>·
or Error. Already enabled

Disconnect()

Disable breakpoints

Send disable-breakpoints
Receive command>·
or Error. Already disabled

Exit

Send exit
Receive Sayonara baby

Pause()

Send enter-cpu-step
Receive command@cpu-step>·

Continue()

Send run
Receive (nothing until breakpoint hit)

StepOver()

Send cpu-step-over
Receive command@cpu-step>·

Step()

Send cpu-step
Receive command@cpu-step>·

RefreshMemoryPages()

Send get-memory-pages
Receive (48k) command@cpu-step>·
Receive (128k) RO1 RA5 RA2 RA0 SCR5 PEN
command@cpu-step>·
  • First four entries represent each 16k slot. RO# = ROM number, RA# = RAM bank.
  • SCR indicates which bank is currently in the screen slot.
  • PEN indicates paging is enabled. Alternatively it would be PDI when disabled.

ReadMemory( address, length )

Send read-memory 5625 10
Receive 56EBCD2C16E1D9C987C6
command@cpu-step>·

Address & length are sent as decimal.

RefreshRegisters()

Send get-registers
Receive PC=15f9 SP=ff4a BC=0921 A=00 HL=5cb9 DE=5ca8 IX=ffff IY=5c3a A'=00 BC'=174b HL'=107f DE'=0006 I=3f R=59 F= Z P3H F'= Z P MEMPTR=15f7 EI IM1 VPS: 0
command@cpu-step>·
  • Registers parsed by regex:
  • Flags parsed by regex:
    • (?i)(?'register'F\'?)=(?'s'.{1})(?'z'.{1})(?'bit5'.{1})(?'pv'.{1})(?'bit3'.{1})(?'h'.{1})(?'n'.{1})(?'c'.{1}) open in regex101

Results are always hex.

SetRegister()

Send set-register PC=1234 (decimal)
Receive command@cpu-step>·