Whether it's a TPDD or a PC that emulates a TPDD (e.g., DESKLINK.COM), a NEC8201a laptop must have a cable connection at its RS-232C port. If a TPDD is what is connected at the other end of the cable, then the cable must be a TPDD cable; if a PC that emulates a TPDD is what is connected at the other end of the cable, then the cable must be a nul-modem cable.
Rather than use a NEC8201a version of TS-DOS which consumes a large amount of free memory, consider using a NEC8201a version of TEENY which consumes the same "teeny" amount of free memory as its M10x and M200 versions - an image size of 747 bytes. I provided Gary Weber a textual .DO file (TEENYN.DO) that installs a NEC-variant TEENY.CO file. The installation of the NEC-variant TEENY.CO file, operates just like installation of the M10x and M200 variants: the installation allocates the internal addresses within file TEENY.CO based on an "End address" that you specify during the installation. Installation file TEENYN.DO is attached to this message. TEENYN.DO contains the textual form of BASIC statements that, when run (i.e., when interpreted by the BASIC interpreter of the NEC8201a laptop), install a NEC-variant TEENY.CO file within the file system of the NEC8201a laptop. During the installation you are prompted for an "End address" and you are given the simplifying option to (Press ENTER for just below HIMEM). Unlike the M10x and M200 laptops, there is no HIMEM "function" in a NEC PC-8201A laptop. Instead, the current point of HIMEM is found by using the BASIC phrase PRINTPEEK(-3196)+PEEK(-3195)*256. The highest (cold-start) possible point of HIMEM for a NEC PC-8201A laptop is 62336, and the corresponding "End address" for TEENY.CO is 61589 (i.e., 62336-747). After using the NEC-variant file TEENY.CO for a while, you might wish to convert it to a trigger file in order to obtain an additional 746 bytes of free memory. The BASIC statements shown below convert file TEENY.CO to a trigger file named Tnnnnn.CO where nnnnn stands for its HIMEM requirement. (e.g., T61589.CO). CLEAR12:T$="TEENY.CO":BLOADT$:KILLT$:T=PEEK(-1600)+256*PEEK(-1599):T$=LEFT$( T$,1):BSAVET$+MID$(STR$(T),2),T,1,T Like any binary file, be it a M10x-variant or a M200-variant or a NEC-variant binary file, the Point of HIMEM must be set to an address that is equal to, or lower than, the HIMEM requirement of the binary file. Be it a M10x or a M200 or a NEC PC-8201A laptop, the second argument of the CLEAR command is what sets the Point of HIMEM. For example, the BASIC statement shown below sets the Point of HIMEM to 61589. CLEAR0,61589 Keeper of the Primordial Bit (born of the Big Bit Bang), -= Ron Wiesen =- _____ From: M100 [mailto:[email protected]] On Behalf Of ultimate quantifier Sent: Friday, May 29, 2015 19:25 To: Model 100 Discussion Subject: [M100] can a tpdd be used with a nec 8201a? i know a tpdd can be used with the m100 units and tsdos. i think a version of tsdos is available for the nec 8201a... but how would a tpdd connect with the nec?
TEENYN.DO
Description: Binary data
