The 4P-ROM adds new features and improved performance of Model 4P systems. The new features include:
The 4P-ROM can also be customized with your name, address, drivers' license number, or other identifying information that is displayed on demand or when a boot fails, such as when there is no diskette in drive 0.
This customization is available when the 4P-ROM is ordered by itself or as part of HBUILD6. There is an additional $50 charge for customizing the ROM. Specify 4PBRCU0 in addition to the 4P-ROM or HBUILD6 part number. Allow an additional four weeks for order processing for any customizations. Click here for the details on 4P-ROM customization.
|4P-ROM System Requirements:|| |
|CPU||Model 4P non-gate-array or 4P gate-array system.|
|Processor||Z80A or a superset processor, including the XLR8er accelerator. * **|
|Floppy Drive||Two Radio-Shack-compatible floppy drives, although one or both can be double-sided, and can be 5.25" or 3.5" media, provided the current boot ROM will boot correctly as the system stands.|
|Hard Drive||Any Radio Shack-compatible configuration including no drives.|
|Operating Systems||The following systems have been tested: LDOS 5, TRSDOS 6, LS-DOS 6, CP/M+, NEWDOS, TRSDOS 1.3/1.4.|
|Hardware||The 4P-ROM may be used with a SmartWatch(TM) clock chip.** |
|Keyboard||The Model 4P was only available in a US keyboard layout, and that is the only supported arrangement.|
Important: The HBUILD6 package contains the software that allows systems to boot directly from hard disk drives. and most HBUILD6 packages packages include an 4P-ROM.  If ordering one of those packages, you don't need to order the 4P-ROM separately. Read about HBUILD6 here.
|What hard disk drives the 4P-ROM is to be used with||Part Number||Price|
|4P-ROM ROM for non-gate-array or gate-array Model 4P systems With hard disk driver for Radio Shack WD1000 or TB1 controllers (If you don't have a disk system right now, order this part, as it is the most common controller should you obtain one later on.)||4PBR640||$28.00|
|4P-ROM ROM for non-gate-array or gate-array Model 4P systems With hard disk driver for MISOSYS SCSI Host interface and Adaptec or XEBEC disk controller||4PBR645||$28.00|
|4P-ROM ROM for non-gate-array or gate-array Model 4P systems With hard disk driver for non-Radio Shack WD1000 controllers that are port-mapped at 0x78 - 0x7f||4PBR647||$28.00|
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