Kelly: No problem. When I use the term "BIOS" I use it generically. The technical manual for the T2K reads like any other PC-style book with conventional BIOS interrupts (10h=video, 13h=floppy, etc.) From the Technical Reference, I can't tell how much functionality is in those ROMs and how much is contained in the MS-DOS "bios" (which is in IO.SYS). The easiest way I've found to dump them is by pulling them from the board and reading them in an EPROM programmer. If you don't have equipment do that, you can boot the machine and read the chips using BASIC or DEBUG and saving the info to a binary file. Based on my notes, the BIOS is located Based on the ROM size (only 16k), I would have agreed that it probably has less functionality than the typical PC-style BIOS. But, I went back to the ASM listing of the original PC BIOS and it ORGed at FE000, which would result in an 8k BIOS. Thanks again for the help. I've amassed enough code from various sources that I can probably start coding soon. Rich Rich Cini Collector of classic computers Lead engineer, Altair32 Emulator Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ Web site: http://www.altair32.com/ /***************************************************/ -----Original Message----- From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Kelly Leavitt Sent: Sunday, October 15, 2006 8:26 PM To: General Discussion: On-Topic and Off-Topic Posts Subject: RE: Tandy 2000 boot roms needed Rich: I have a running 2000 here, that I can transfer files from. The 2000 does not have a BIOS like a PC. I believe the internal ROMs are just a POST and a boot strap, and the rest of the PC like BIOS is on the MS-DOS boot disk. I have been relayed this information by someone that used to develop and debug the 2000 for Tandy/Radio Shack. Do you know a way to dump them? I guess if I knew their starting address and length I could use debug. I also have Microsoft's Assembler for the 2000. Kelly PS I still owe you a phone call about the 2000s. I have one that I don't need, but it doesn't work. My suspicion is the power supply, but I've taken no time to verify this. This unit includes keyboard, HD controller, 10 meg drive and one or two 720k floppies, depending on the unit.