ZUC02AA@WYOCDC1.BITNET (Richard Travsky 307-766-3663/3668) (02/19/88)
Hello CPM list - I have a problem that can't really be answered with a simple yes or no. Recently, LISTSERV@RPICICGE.BITNET started carrying CPM files from SIMTEL20. I have a Kaypro 2X, work on a VAX cluster running VMS, am on BITNET myself, and with great joy noticed a VT52 emulator. Got it, and it didn't work. Ok. The file was <CPM.KAYPRO>KP-VT52.LBR. I ordered it mailed, uuencoded. Used a CPM version of Kermit to download it to my Kaypro. Decoded it. Ex- tracted everything with NULU151.COM (also ordered from the LISTSERV). Using a 300/1200 baud Avatex brand partially Hayes compatible modem, I fired it up. It sat there, dead still. No response of any kind. With the modem on, the screen starts a pyrotechnic display that 15 years ago I would have considered a cheap high. This machine was gone. Had to push the reset. I traced exe- cution with DDT and here's what I saw: PC Instruction ==== =========== 0100 NOP 0101 NOP 0102 LXI H,0000*0105 0105 DAD SP*0106 0106 SHLD 0506*0109 0109 LXI SP,4082*010C 010C LXI D,4000*010F 010F LXI H,05F9*0112 0112 LXIB,05FA*0115 0115 ??= ED*425D 425D RST 07*425D and the PC is 425D forever after. This emulator was written in Z80 by Ray Rizzuto and he used Z80MR as an assembler (which I notice is also available from this LISTSERV). He states in his accompanying documentation that this is written for non-graphic versions of the Kaypro and you guessed it mine is a graphics version. Has anyone used this emulator? Is there an updated version available? How about a fix of some kind (I'm not a Z80 whiz but I can stumble through instructions)? Or, is there another VT52 emulator I can get? Any help would be greatly appreciated by myself and by several other Kaypro owners here who are watching and waiting! I am not on this list so please write to me directly. Thanks! Rich Travsky University of Wyoming ZUC02AA@WYOCDC1.BITNET P.S. Once - ONCE - after jiggling the modem cable, I got the modem to auto-dial, but the screen was completely blank (not even a cursor). Haven't figured that one out yet.