There was a test a long time ago.

==================================================================================== * Forwarded from NETMAIL by Kirill Frolov (500:812/9.8). * Originally by: Musa Khaybullin (2:5085/1.65), 27 Jun 99 14:09. * Originally to: Kirill Frolov. ==================================================================================== Received: (from fnet@localhost) by main.bcc.com.uz (8.8.2-MVC-141196/8.7.5) id PAA09038fo Greetings, Kirill! KF>>> =:-[ ] How is this possible? There is nothing in the manual about hl KF>>> written ! The NEG command changes HL ? MK>> Judging by the procedure, yes. KF> What does it change there? See for yourself: XOR A LD HL,#0202 N.E.G. LD A,L CP 4 JR...... ^^^^^^^^^^^^^^^^^^^^^^^^^^ Who can explain on what processors such glitches are observed? IMHO these should be thrown out right away... Kirill Frolov. [ZX]