Nick: roxfan
E-mail: none
Board: Supermicro H8SGL board enable pseudocode
Contents: 
// PrepareForFlashProgramming is at F000:05FC in the unpacked SLAB (module 1b)
// for the BIOS H8SGL2.831

h8sgl_board_enable:
  flash_write_enable()
  enable_rom_map()
  oem_enable()
  imc_gpio9_high()

imc_present:
  return pci[0:14.3][0x40] & 0x80; // IntegratedImcPresent

testenable_on:
  io[0xCD6] = 0x53; // TESTENABLE?
  io[0xCD7] |= 8;

testenable_off:
  io[0xCD6] = 0x53; // TESTENABLE?
  io[0xCD7] &= ~8;

// 8587
hpet_bar_unhide:
  pci[0:14.0][0x43] &= ~8; // HPETBarHid = 0

// 8599
hpet_bar_hide:
  pci[0:14.0][0x43] |= 8;  // HPETBarHid = 1

// 868A
imc_read_byte(idx):
  io[0x3E] = idx
  return io[0x3F]

// 8697
imc_write_byte(idx, val):
  io[0x3E] = idx
  io[0x3F] = val

// 86A4
imc_wait_reply:
  while 1:
    fixed_delay(66)
    if imc_read_byte(0x82) == 0xFA:
      break

// 8630
imc_send_command(id, val):
  if imc_present():
    imc_write_byte(0x82, 0)
    imc_write_byte(0x83, id>>8)
    imc_write_byte(0x84, id&0xFF)
    imc_write_byte(0x80, val)
    fixed_delay(4000)
    imc_wait_reply()

// 85D5
imc_disable:
  hpet_bar_unhide()
  if (pci[0:14.0][0x20] & 2) == 0:
    pci[0:14.0][0x20] |= 2
    if cmos[0x7D] & 8:
      imc_send_command(0x00B4, 0x96)
  hpet_bar_hide()

// 1388
disable_imc_if_present:
  if imc_present():
    testenable_on()
    imc_disable()

// 12FD
flash_write_enable:
  disable_imc_if_present()
  pci[0:14.0][0x79] |= 1; // PM_Addr_Enable = 1
  io[0xC6F] |= 0x40;      // Flash Rom Program Enable?

// 13DD
enable_rom_map:
  val = pci[0:14.0][0x41]
  val &= ~0x12
  val |= 0x12
  pci[0:14.0][0x41] = val
  
  pci[0:14.3][0xA3] |= 0x10; // Rom Range 2 Port Enable
  pci[0:14.3][0x6C]  = 0xA0; // LPC ROM Address Range 2

// 1353
oem_enable:
  if imc_present():
    hpet_bar_unhide()
    pci[0:14.0][0x20] &= ~1;
    hpet_bar_hide()
    testenable_off()

// 94F1
imc_gpio9_high:
  pci[0:14.3][0xC9] &= ~2; // IMC_Gpio_OeB[9]=0 (enable)
  pci[0:14.3][0xC7] |=  2; // IMC_Gpio_Out[9]=1 (high)