Simplified ROM folder structure
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Jeff Parsons
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123 changed files with 118 additions and 117 deletions
106
devices/pc/rom/5170/README.md
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106
devices/pc/rom/5170/README.md
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---
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layout: page
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title: IBM PC AT (Model 5170) ROMs
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permalink: /devices/pc/rom/5170/
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redirect_from:
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- /devices/pc/5170/
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- /devices/pc/bios/5170/
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---
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IBM PC AT (Model 5170) BIOS
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---
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[ATBIOS-REV1.json](1984-01-10/ATBIOS-REV1.json) contains the original IBM PC AT BIOS.
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From [http://minuszerodegrees.net/bios/BIOS_5170_10JAN84_6MHZ.zip](http://minuszerodegrees.net/bios/):
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This is the first BIOS for the IBM 5170.
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It is dated 10JAN84.
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It is found in type 1 motherboards running at 6 Mhz.
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U27 has the IBM part number of 6181028, and is 32K in size
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U47 has the IBM part number of 6181029, and is 32K in size
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8 bit checksum of 6181028 = 36
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8 bit checksum of 6181029 = CA
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--
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added = 00
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There are two BIN files in this ZIP file:
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1. BIOS_5170_10JAN84_U27_6181028_27256_6MHZ.BIN --> Use this to create a U27 using a 27256 EPROM (rated at 150nS or faster)
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2. BIOS_5170_10JAN84_U47_6181029_27256_6MHZ.BIN --> Use this to create a U47 using a 27256 EPROM (rated at 150nS or faster)
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The JSON-encoded ROM image that PCjs uses was created using the *FileDump* command-line *merge* option:
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filedump --file=http://archive.pcjs.org/devices/pc/rom/5170/BIOS_5170_10JAN84_U27_6181028_27256_6MHZ.BIN --merge=http://archive.pcjs.org/devices/pc/rom/5170/BIOS_5170_10JAN84_U47_6181029_27256_6MHZ.BIN --output=ATBIOS-REV1.json --overwrite
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Since a MAP file ([ATBIOS-REV1.map](1984-01-10/ATBIOS-REV1.map)) exists as well, it is automatically appended to the JSON file
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([ATBIOS-REV1.json](1984-01-10/ATBIOS-REV1.json)) when using a ROM input file (or JSON output file) with a matching filename.
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It is also possible to create a merged binary ROM image ([ATBIOS-REV1.rom](http://archive.pcjs.org/devices/pc/rom/5170/ATBIOS-REV1.rom))
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by adding *--format=rom* to the command-line (the default is *--format=json*).
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These operations can only be performed using the *FileDump* command-line interface; the *FileDump* API does not support
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either the *merge* option or the appending of MAP data. For the moment, the API can only dump unadorned ROM images; eg:
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http://localhost:8088/api/v1/dump/?file=http://archive.pcjs.org/devices/pc/rom/5170/ATBIOS-REV1.rom
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---
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IBM PC AT (Model 5170) BIOS ("Rev 2")
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---
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[ATBIOS-REV2.json](1985-06-10/ATBIOS-REV2.json) contains the second IBM PC AT BIOS, dated June 10, 1985, which expanded hard disk
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support from 15 to 23 drive types, fixed some bugs, and added support for 720Kb 3.5-inch floppy diskette drives.
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From [http://minuszerodegrees.net/bios/BIOS_5170_10JUN85_6MHZ.zip](http://minuszerodegrees.net/bios/):
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This is the second BIOS for the IBM 5170.
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It is dated 10JUN85.
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It is found in type 2 motherboards running at 6 Mhz.
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U27 has the IBM part number of 6480090, and is 32K in size
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U47 has the IBM part number of 6480091, and is 32K in size
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8 bit checksum of 6480090 = 71
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8 bit checksum of 6480091 = 8F
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--
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added = 00
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There are two BIN files in this ZIP file:
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1. BIOS_5170_10JUN85_U27_6480090_27256.BIN --> Use this to create a U27 using a 27256 EPROM (rated at 150nS or faster)
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2. BIOS_5170_10JUN85_U47_6480091_27256.BIN --> Use this to create a U47 using a 27256 EPROM (rated at 150nS or faster)
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The JSON-encoded ROM image that PCjs uses was created using the *FileDump* command-line *merge* option:
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filedump --file=http://archive.pcjs.org/devices/pc/rom/5170/BIOS_5170_10JUN85_U27_6480090_27256.BIN --merge=http://archive.pcjs.org/devices/pc/rom/5170/BIOS_5170_10JUN85_U47_6480091_27256.BIN --output=ATBIOS-REV2.json --overwrite
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---
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IBM PC AT (Model 5170) BIOS ("Rev 3")
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---
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[ATBIOS-REV3.json](1985-11-15/ATBIOS-REV3.json) contains the third (and last) IBM PC AT BIOS, dated November 15, 1985,
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which added support for 101-key keyboards and 1.44Mb floppy diskette drives.
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From [http://minuszerodegrees.net/bios/BIOS_5170_15NOV85_8MHZ_VARIATION_2.zip](http://minuszerodegrees.net/bios/):
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This is the third BIOS for the IBM 5170.
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It is dated 15NOV85.
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It is found in type 2 motherboards running at 8 Mhz.
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U27 has the IBM part number of 61X9266, and is 32K in size
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U47 has the IBM part number of 61X9265, and is 32K in size
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8 bit checksum of 61X9266 = 10
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8 bit checksum of 61X9265 = F0
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--
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added = 00
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There are two BIN files in this ZIP file:
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1. BIOS_5170_15NOV85_U27_61X9266_27256.BIN --> Use this to create a U27 using a 27256 EPROM (rated at 150nS or faster)
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2. BIOS_5170_15NOV85_U47_61X9265_27256.BIN --> Use this to create a U47 using a 27256 EPROM (rated at 150nS or faster)
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The JSON-encoded ROM image that PCjs uses was created using the *FileDump* command-line *merge* option:
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filedump --file=http://archive.pcjs.org/devices/pc/rom/5170/BIOS_5170_15NOV85_U27_61X9266_27256.BIN --merge=http://archive.pcjs.org/devices/pc/rom/5170/BIOS_5170_15NOV85_U47_61X9265_27256.BIN --output=ATBIOS-REV3.json --overwrite
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