USD CurrencyUSD
AED CurrencyAED
AFN CurrencyAFN
ALL CurrencyALL
AMD CurrencyAMD
ANG CurrencyANG
AOA CurrencyAOA
ARS CurrencyARS
AUD CurrencyAUD
AWG CurrencyAWG
AZN CurrencyAZN
BAM CurrencyBAM
BBD CurrencyBBD
BDT CurrencyBDT
BGN CurrencyBGN
BHD CurrencyBHD
BIF CurrencyBIF
BMD CurrencyBMD
BND CurrencyBND
BOB CurrencyBOB
BRL CurrencyBRL
BSD CurrencyBSD
BTN CurrencyBTN
BWP CurrencyBWP
BYN CurrencyBYN
BYR CurrencyBYR
BZD CurrencyBZD
CAD CurrencyCAD
CDF CurrencyCDF
CHF CurrencyCHF
CLF CurrencyCLF
CLP CurrencyCLP
CNH CurrencyCNH
CNY CurrencyCNY
COP CurrencyCOP
CRC CurrencyCRC
CUC CurrencyCUC
CUP CurrencyCUP
CVE CurrencyCVE
CZK CurrencyCZK
DJF CurrencyDJF
DKK CurrencyDKK
DOP CurrencyDOP
DZD CurrencyDZD
EGP CurrencyEGP
ERN CurrencyERN
ETB CurrencyETB
EUR CurrencyEUR
FJD CurrencyFJD
FKP CurrencyFKP
GBP CurrencyGBP
GEL CurrencyGEL
GGP CurrencyGGP
GHS CurrencyGHS
GIP CurrencyGIP
GMD CurrencyGMD
GNF CurrencyGNF
GTQ CurrencyGTQ
GYD CurrencyGYD
HKD CurrencyHKD
HNL CurrencyHNL
HRK CurrencyHRK
HTG CurrencyHTG
HUF CurrencyHUF
IDR CurrencyIDR
ILS CurrencyILS
IMP CurrencyIMP
INR CurrencyINR
IQD CurrencyIQD
IRR CurrencyIRR
ISK CurrencyISK
JEP CurrencyJEP
JMD CurrencyJMD
JOD CurrencyJOD
JPY CurrencyJPY
KES CurrencyKES
KGS CurrencyKGS
KHR CurrencyKHR
KMF CurrencyKMF
KPW CurrencyKPW
KRW CurrencyKRW
KWD CurrencyKWD
KYD CurrencyKYD
KZT CurrencyKZT
LAK CurrencyLAK
LBP CurrencyLBP
LKR CurrencyLKR
LRD CurrencyLRD
LSL CurrencyLSL
LYD CurrencyLYD
MAD CurrencyMAD
MDL CurrencyMDL
MGA CurrencyMGA
MKD CurrencyMKD
MMK CurrencyMMK
MNT CurrencyMNT
MOP CurrencyMOP
MRO CurrencyMRO
MRU CurrencyMRU
MUR CurrencyMUR
MVR CurrencyMVR
MWK CurrencyMWK
MXN CurrencyMXN
MYR CurrencyMYR
MZN CurrencyMZN
NAD CurrencyNAD
NGN CurrencyNGN
NIO CurrencyNIO
NOK CurrencyNOK
NPR CurrencyNPR
NZD CurrencyNZD
OMR CurrencyOMR
PAB CurrencyPAB
PEN CurrencyPEN
PGK CurrencyPGK
PHP CurrencyPHP
PKR CurrencyPKR
PLN CurrencyPLN
PYG CurrencyPYG
QAR CurrencyQAR
RON CurrencyRON
RSD CurrencyRSD
RUB CurrencyRUB
RWF CurrencyRWF
SAR CurrencySAR
SBD CurrencySBD
SCR CurrencySCR
SDG CurrencySDG
SEK CurrencySEK
SGD CurrencySGD
SHP CurrencySHP
SLL CurrencySLL
SOS CurrencySOS
SRD CurrencySRD
SSP CurrencySSP
STD CurrencySTD
STN CurrencySTN
SVC CurrencySVC
SYP CurrencySYP
SZL CurrencySZL
THB CurrencyTHB
TJS CurrencyTJS
TMT CurrencyTMT
TND CurrencyTND
TOP CurrencyTOP
TRY CurrencyTRY
TTD CurrencyTTD
TWD CurrencyTWD
TZS CurrencyTZS
UAH CurrencyUAH
UGX CurrencyUGX
UYU CurrencyUYU
UZS CurrencyUZS
VES CurrencyVES
VND CurrencyVND
VUV CurrencyVUV
WST CurrencyWST
XAF CurrencyXAF
XCD CurrencyXCD
XOF CurrencyXOF
XPF CurrencyXPF
YER CurrencyYER
ZAR CurrencyZAR
ZMW CurrencyZMW
ZWL CurrencyZWL
Notify me when product is back in stock
DoubleROM - IDE Size Limit Remover - Dual Bootable ROM ISA Card DoubleROM - IDE Size Limit Remover - Dual Bootable ROM ISA Card DoubleROM - IDE Size Limit Remover - Dual Bootable ROM ISA Card

DoubleROM - IDE Size Limit Remover - Dual Bootable ROM ISA Card

$25.00 inc. tax
Add two ROM sockets to any system with ISA slots.
No ROM chips are included by default. Select them with the drop-down boxes.

  • Choose from memory addresses between C0000 and F0000.
  • Supports 27(C)64, 28C64B, and 28C256 ROM chips.
  • Supports writing to EEPROMs.

Some example uses are:
  • Add HD floppy support to an XT (provided you already have an HD Floppy Controller).
  • Add XT-IDE Universal BIOS to any machine, including 286, 386, 486, and Pentium machines, to support more hard drive types.
  • Use as an EEPROM programmer. (XTIDECFG can program non-XT-IDE ROM images too)
If choosing to include a ROM programmed with XT-IDE BIOS, you must specify in the checkout comments, what configuration you'd like. If you do not specify, it will come configured for the most common scenario of a single 16-bit ISA interface at port 1F0 (for 286 and up).
You can always change the configuration with XTIDECFG at any time, since you can write to the EEPROMs.

Some possible XT-IDE BIOS Controller Types:

  • 16-bit IDE Interface (on a MultiIO or Sound card) (Primary (1F0), Secondary (170), Other)
  • 32-bit VLB/PCI IDE Interface (Primary (1F0), Secondary (170), Other)
  • 16-bit IDE interface in 8-bit mode (for CF card adapter only) (Primary (1F0), Secondary (170), Other)

If using in a 386 or up, your System BIOS has the option, and you have everything configured how you want it, you should enable ROM Shadowing at the addresses of the ROM Sockets in use, to improve performance. You may need to disable this function if you want to reprogram the chip from DOS.

XT-IDE Universal BIOS Firmware and config utility
XT-IDE Universal BIOS Source
Product Code: 006-DoubleROM
Product Condition: New
weight: 80.0g
Updating Order Details
Please do not refresh or navigate away from the page!
Get that 386/486 to break the 504MB Barrier
Saturday, May 21, 2022
I recently installed one of these into a 386 I refurbished and it worked perfectly. The BIOS in the 386 would not support any hard drive above 257MB (only option was to pick a "type" from a selection of about 40). With this little ISA card I was able to install a 4GB CF card connected to an IDE to CF adapter with no issues. I simply set the hard drives in the BIOS to none and this little card did the rest.
Product Added to your Cart

-------- OR --------