modem7
10k Member
According to:
1. Various editions of Upgrading & Repairing PC's (by Scott Mueller)
2. ROMs in possession
3. IBM's Technical Reference for the 5170
-------------------------
01/10/84
-------------------------
ROM U27 = 32K chip
ROM U47 = 32K chip
KNOWN ROM SETS = U27=6181028/U47=6181029
ID/SUBMODEL/VERSION = FC/--/--
* Found on the type 1 motherboard (type 1 uses 'piggyback' type RAM chips).
* Designed for operation at 6 MHz only.
* Supports 15 hard drive types (with type 15 being reserved).
* Support for 360K and 1.2M floppy drives.
Memory map:
b = ROM BASIC
R = ROM BIOS
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0F0000: RRRRRRRRRRRRRRRRRRRRRRRRbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbRRRRRRRR
------: |<------------------------ U27/U47 ---------------------------->|
-------------------------
06/10/85
-------------------------
ROM U27 = 32K chip
ROM U47 = 32K chip
KNOWN ROM SETS = U27=6480090/U47=6480091
ID/SUBMODEL/VERSION = FC/00/01
* Found on the type 2 motherboard (refer 5170 entry at the VCF Wiki).
* "POST fixes clock rate to 6 MHz"
* Supports 22 hard drive types (with type 15 being reserved).
* Added support for 720k diskette drive.
Memory map:
b = ROM BASIC
R = ROM BIOS
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0F0000: RRRRRRRRRRRRRRRRRRRRRRRRbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbRRRRRRRR
------: |<------------------------ U27/U47 ---------------------------->|
-------------------------
11/15/85
-------------------------
ROM U27 = 32K chip
ROM U47 = 32K chip
KNOWN ROM SETS = U27=61X9266/U47=61X9265 (EPROM) or U27=62X0820/U47=62X0821 (PROM)
ID/SUBMODEL/VERSION = FC/01/00
* Found on the type 3 motherboard (refer 5170 entry at the VCF Wiki).
* "POST fixes clock rate to 8 MHz"
* Supports 23 hard drive types (with type 15 being reserved).
* Added support for 1.44M diskette drive (you can boot from a 1.44M diskette).
* Added support for the 101-key Enhanced keyboard.
Memory map:
b = ROM BASIC
R = ROM BIOS
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0F0000: RRRRRRRRRRRRRRRRRRRRRRRRbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbRRRRRRRR
------: |<------------------------ U27/U47 ---------------------------->|
1. Various editions of Upgrading & Repairing PC's (by Scott Mueller)
2. ROMs in possession
3. IBM's Technical Reference for the 5170
-------------------------
01/10/84
-------------------------
ROM U27 = 32K chip
ROM U47 = 32K chip
KNOWN ROM SETS = U27=6181028/U47=6181029
ID/SUBMODEL/VERSION = FC/--/--
* Found on the type 1 motherboard (type 1 uses 'piggyback' type RAM chips).
* Designed for operation at 6 MHz only.
* Supports 15 hard drive types (with type 15 being reserved).
* Support for 360K and 1.2M floppy drives.
Memory map:
b = ROM BASIC
R = ROM BIOS
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0F0000: RRRRRRRRRRRRRRRRRRRRRRRRbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbRRRRRRRR
------: |<------------------------ U27/U47 ---------------------------->|
-------------------------
06/10/85
-------------------------
ROM U27 = 32K chip
ROM U47 = 32K chip
KNOWN ROM SETS = U27=6480090/U47=6480091
ID/SUBMODEL/VERSION = FC/00/01
* Found on the type 2 motherboard (refer 5170 entry at the VCF Wiki).
* "POST fixes clock rate to 6 MHz"
* Supports 22 hard drive types (with type 15 being reserved).
* Added support for 720k diskette drive.
Memory map:
b = ROM BASIC
R = ROM BIOS
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0F0000: RRRRRRRRRRRRRRRRRRRRRRRRbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbRRRRRRRR
------: |<------------------------ U27/U47 ---------------------------->|
-------------------------
11/15/85
-------------------------
ROM U27 = 32K chip
ROM U47 = 32K chip
KNOWN ROM SETS = U27=61X9266/U47=61X9265 (EPROM) or U27=62X0820/U47=62X0821 (PROM)
ID/SUBMODEL/VERSION = FC/01/00
* Found on the type 3 motherboard (refer 5170 entry at the VCF Wiki).
* "POST fixes clock rate to 8 MHz"
* Supports 23 hard drive types (with type 15 being reserved).
* Added support for 1.44M diskette drive (you can boot from a 1.44M diskette).
* Added support for the 101-key Enhanced keyboard.
Memory map:
b = ROM BASIC
R = ROM BIOS
------: 0---1---2---3---4---5---6---7---8---9---A---B---C---D---E---F---
0F0000: RRRRRRRRRRRRRRRRRRRRRRRRbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbRRRRRRRR
------: |<------------------------ U27/U47 ---------------------------->|
Last edited: