August 22, 2025
Sun 3 bootrom souce - fire up the 3/80
The help menu for the Sun 3/80 shows these three additional
commands that we don't have in the 3/160 code.
^a | Display Phys and Virtual Addresses
^t [addr] | Translate virtual addr to physical
^r | Read On Board Device Registers
Find it and power it up
My 3/80 is stored in a big static bag in a big plastic organizer tub.
I dig it out, connect the power supply and a serial cable and flip
the switch. We get a lot more output than from the 3/160 prom:
Sun-3/80 Boot PROM Selftest (Rev. 3.0.2)
(Press to abort tests or for the Loop Menu)
System Enable Register Read Test {pass 0x00000001} 17:19:11
PROM Checksum Test {pass 0x00000001} 17:19:11
TOD [Clock/Calender] Test {pass 0x00000001} 17:19:12
I/O Mapper RAM Write/Write/Read Test {pass 0x00000001} 17:19:13
I/O Mapper RAM Address Test {pass 0x00000001} 17:19:13
I/O Mapper RAM 3-Pattern Test {pass 0x00000001} 17:19:14
Memory Address Test {pass 0x00000001} 17:19:15 0
Memory Read Byte Alignment Test {pass 0x00000001} 17:19:30
Memory Write Byte Alignment Test {pass 0x00000001} 17:19:30
Bus Error Register Test {pass 0x00000001} 17:19:31
Level 1 Interrupt Test {pass 0x00000001} 17:19:31
Level 2 Interrupt Test {pass 0x00000001} 17:19:31
Level 3 Interrupt Test {pass 0x00000001} 17:19:32
Parity Memory Forced Error Test {pass 0x00000001} 17:19:32
Configuration Memory Check {pass 0x00000001} 17:19:33
LANCE Controller Check {pass 0x00000001} 17:19:33
ESP SCSI Controller Check {pass 0x00000001} 17:19:34
Floppy Controller Check {pass 0x00000001} 17:19:34
Printer Controller Check {pass 0x00000001} 17:19:34
END OF SELFTEST # 0x00000001 (SELFTEST PASSED).
#PASSED = 0x00000001, #FAILED = 0x00000000
Type a Character within 10 seconds to enter the Menu Tests...(e for echo mode)
No Keyboard Found: Using RS232 Port A as input!
Selftest Completed.
Sun Workstation, Model Sun-3/80 Series.
ROM Rev 3.0.2, 16MB memory installed
ID PROM invalid.
Auto-boot in progress...
ERROR: missing or invalid ID prom
ERROR: missing or invalid ID prom
le: No Carrier
ERROR: missing or invalid ID prom
le: No Carrier
ERROR: missing or invalid ID prom
Requesting Internet address for 0:0:0:0:0:0
le: No Carrier
I send a break character to get to the prompt, then:
*** break sent ***
Abort at 0xFEFF23E6.
>
>h
Boot PROM Monitor Commands
----------------------------------------------------------------------------
a [digit] | Open CPU Addr Reg (0-7)
b [dev([cntrl],[unit],[part])] | Boot a file
c [addr] | Continue program at Addr
d [digit] | Open CPU Data Reg (0-7)
e [addr] | Open Addr as 16 bit word
f [beg_addr] [end_addr] [patt] [bwl] | Fill Memory
g [addr] | Go to Address
h | Display this Help Menu
k [number] | Reset (0)CPU, (1)PMMU, (2)System
l [addr] | Open Addr as 32 bit long
m [A] [B] [addr] | Open TIA or TIB Table
----------------------------------------------------------------------------
Hit Any Key to Continue through Help Menu
----------------------------------------------------------------------------
o [addr] | Open Addr as 8 bit byte
p [addr] | Open Page Map
q [addr] | Open EEPROM
r [reg] | Open CPU Regs (i.e. PC)
s [digit] | Set/Query Function Code (0-7)
t [y/n/c] | Trace: Yes/No/Continue
u [arg] | Select Console Device
v [beg_addr] [end_addr] [bwl] | Display Memory
w [addr] [string] | Vector
x | Extended Diag Tests
z [addr] | Set Breakpoint
^a | Display Phys and Virtual Addresses
^t [addr] | Translate virtual addr to physical
^r | Read On Board Device Registers
----------------------------------------------------------------------------
>^r
TC: (0x80D07660) CRP: (0x7FFF0003) (0xFFA000)
SYS ENA: (0x8000) INT: (0x81) BERR: (0x20) VBR: (0xFEF72000)
MEM ERR CNTRL: (0x50505050) MEM ERR ADDR: (0xFFE818)
>^a
Devcie: Virtual Address: Physical Address:
Keybrd Mouse 0xFEF00000: 0x62000000:
Serial Port 0xFEF02000: 0x62002000:
EEPROM 0xFEF04000: 0x64000000:
TOD 0xFEF06000: 0x640007F8:
Mem Err Reg 0xFEF09000: 0x61001000:
Int Reg 0xFEF0B400: 0x61001400:
le Ethernet 0xFEF0E000: 0x65002000:
Sys ENA Reg 0xFEF16000: 0x61000000:
Bus ERR Reg 0xFEF18400: 0x61000400:
IDPROM 0xFEF047D8: 0x640007D8:
VIDEOMEM_BASE 0xFEF20000: 0x50400000:
P4 Video Reg 0xFEF1E000: 0x50300000:
P4 DAC 0xFEF0C000: 0x50200000:
P4 Overlay 0xFEF20000: 0x50400000:
P4 ENA Plane 0xFEF40000: 0x50600000:
IOMAPPER 0xFEF66000: 0x60000000:
FDC 0xFEF7A000: 0x6E000000:
FDC_CNTRL_REG 0xFEF7A400: 0x6E000400:
FDC_VEC_REG 0xFEF7A800: 0x6E000800:
PRINTER_PORT 0xFEF8003C: 0x6F00003C:
Compare the above list to these addresses I have located in the
3/160 source code:
EEPROM -- 0x6400_0000 (0xfef0_4000 virtual)
TOD -- 0x6400_07f8 (0xfef0_6000 virtual)
IDPROM -- 0x6100_0C00 (0xfef1_cc00 virtual)
Also note that the serial port virtual addresses are the same for
the 3/160 and the 3/80. This means that standalone demo code I have
written should run unchanged.
Feedback? Questions?
Drop me a line!
Tom's Computer Info / tom@mmto.org