80-Bus News

  

March-April 1983, Volume 2, Issue 2











Page 22 of 55











22

I get around the inconsistency of some programs using CR and others using CR and LF at line ends as follows. The printer procedure ignores LF’s completely, and converts CR to LF before sending it to the printer, which has AUTO FEED off. CH is converted ta CR in order to preserve compatibility with Nas-Sys cursor controi. The MX8O"s block graphic character set has different codes to Nas-Graphics. This short procedure converts from Nascom to Epson graphes:

sNas graph char in A

SUB #C0 LE DB,A LD &, #46 wo B,S 3&6 LD HL,CTAB SFL oO JR ONC.CE OR CHL? = INC HL DINZ Ci sexit with Epsom graph char in A RET – CTAB DEFB 1,4,14,2,8,22

ry foot

mo

Finally, I disagree with David Hunt*s comments about =ON/AOFF protocol. At work fF am aiuser of small computers (mainly PDF 11}, which use only this protecal. Both in terms of cabling costs and interface simplicity it is greatiy to be preffered tao handshaking with DTR etc. Indeed, few DEC interfaces suopert nNandshake lines. and XON/ ZOFF is the only available method for Z20mA current ilooo cammunicatian.

Classified Ads.

These ads. are printed free-of-charge (when space permits) provided that they are for the sale of private property and are not for commercial gain. If you want to advertise games, or that Greenhouse Controller Board then you’ll have to pay. Write for details of our super rates.

Nascom RAM card A. ; 32K fitted + 4K firmware; works at 4MHz without wait states £50 ONO. Tel: Clive Graham, Crawley 547400.

Nascom 2.

Cased with 48K, graphics, Nas-Sys 3 & 1, Imp printer, Hobbit microcassette system, toolkit, Zeap, Nas-Dis, Naspen, games, spare cassettes, magazines and books. Complete working system, £450 for clearance.

Colchester (0206) 841293.

Cheap printers:

1) Epson MX-70 (80-col + dot gaphics).

2) Golfball Terminal/Typewriter with Serial interface (135 baud – 15cps) (software and baud rate generator for Nascom also available)

£190 ono each. Mike, 01 874 6244.


This is an OCR’d version of the scanned page and likely contains recognition errors.











Page 22 of 55