dxwoodbu@crdc.arpa (Lt. Donald Woodbury) (01/20/86)
Does anybody know how to access the tone generator for the HP150? I
have most of the technical manuals - it is not documented.
Don WoodburyBillW@su-score.arpa (01/21/86)
The tone generator on the hp150 is in the 8041 that scans the keyboard and touchecreen. It's documented on page 3-50 and 3-51 of my "preliminary technical reference manual". I don't know if this ever made it to print in a less preliminary form, but here is the relevant data: 8041 commands IO port (19h) comand code Function 08h Stop bell immediately 22h keyclick off 23h keyclick on 30h-3Fh Beep bell. duration is about 100ms, and the tone is determined by the low nibble (about 290 Hz for 0 and 1.7Khz for F. 40h do one keyclick immediately. keyclick must be on. Those are only the codes that have to do with sound... Enjoy BillW
scott@hp-pcd.UUCP (scott) (01/25/86)
I'm not sure what technical manuals you have, but it is documented in the HP150 Technical Reference Manual. I think that it was part of the keyboard controller chip. From BASIC, an OUT 27,xx where xx is from 30 to 46 will generate the 16 tones available (the 27 is correct; I'm not quite sure about the 30 to 46!). Anyway, it's rather limited as far as tone generators go.... hp-pcd!hpcvcc!scott