wfjm.w11/tools/mcode/m9312/bootw11.md

M9312: bootw11: interactive boot

The bootw11 code is a proof-of-principle boot code for the w11. Intended usage is the test of the M9312 emulation. It supports

• DK: RK11/RK05 boot
• DL: RL11/RL02 boot
• DB: RH70/RP06 boot
• MT: TM11 boot
• PR: PC11 boot

Start on w11

See general notes on

• FPGA Board setup
• Rlink and Backend Server setup

First, connect to an FPGA board or in a GHDL simulation with

ti_w11 <opt>

Then load the bootw11 code into the emulated M9312. Because software sees the M9312 as a read-only memory area, the code can't be loaded with the usual methods. Instead, a dedicated interface is used:

  package require ibd_m9312
  set start [ibd_m9312::load cpu0 "bootw11.mac"]

The code is started with

  cpu0 cp -stapc $start

and writes a @ prompt to console. To test a boot device, first attach a bootable disk or a ram: disk with dummy boot block, and then enter the boot device name, with optional unit number and a CR. Like

  cpu0rka0 att "ram:dk0?noboot;pat=dead"
  < DK0

This uses the < command that injects tests into the console directly. The dummy boot block will write a message to console and halt the CPU. The code can be restarted, it's in an emulated PROM after all, for additional tests.