The HP67 calculator has three angle modes: DEG, RAD and GRD.<\/p>\n
DEG is degrees. There are 360 degrees in a circle.
\nRAD is radians. There are 2*PI radians (about 6.28) in a circle.
\nGRD is gradians. I’d never heard of these before I got my original HP67 but apparently these are used in some fields and there are 400 gradians in a circle.
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\nYou select the angle mode by pressing [h] then [ENTER], [CHS] or [EEX]. The key codes you’ll see in W\/PRGM are “35 41”, “35 42” or “35 43”.<\/p>\n
The angle mode is one of the pieces of status information written to each side of a magnetic card, whether you write program information or data.<\/p>\n
h DEG 45 f SIN = 0.71, STO 0, g SIN-1 = 45.00
\nRCL 0 h RAD g SIN-1 = 0.79 (=PI\/4)
\nRCL 0 h GRD g SIN-1 = 50.00<\/p>\n
When you select an angle mode the calculator remembers your choice by setting a combination of bits in its internal S register. You can see this by choosing different angle modes in the HP67u and looking at the S register via menu \/ Advanced.<\/p>\n
The combinations are:
\nDEG S0=0 & S14=0
\nRAD S0=1 & S14=0
\nGRD S0=0 & S14=1<\/p>\n
\r\n[h] [DEG]\r\n00214 display off\r\n00215 b exchange c[w]\r\n00216 CRC 400\r\n00217 keys to a\r\n...\r\n00252 delayed rom 01\r\n00253 a -> rom address\r\n00522 ...\r\n07205 0 -> s 0 \r\n07206 0 -> s 14<\/strong> \r\n07207 if n\/c go to 07313\r\n07313 delayed rom 00 \r\n07314 if n\/c go to 0074\r\n00074 ...\r\n00161 hi im woodstock\r\n00162 display off\r\n00163 display toggle\r\n00164 ...\r\n(00167 - 00213; wait loop)\r\n\r\n[h] [RAD]\r\n00214 display off\r\n00215 b exchange c[w]\r\n00216 CRC 400\r\n00217 keys to a\r\n...\r\n00252 delayed rom 01\r\n00253 a -> rom address\r\n00521 ...\r\n07203 1 -> s 0 \r\n07204 if n\/c go to 07206\r\n07206 0 -> s 14 <\/strong>\r\n07207 if n\/c go to 07313\r\n07313 ...\r\n\r\n[h] [GRD]\r\n00214 display off\r\n00215 b exchange c[w]\r\n00216 CRC 400\r\n00217 keys to a\r\n...\r\n00252 delayed rom 01\r\n00253 a -> rom address\r\n00520 ...\r\n07210 0 -> s 0 \r\n07211 1 -> s 14 <\/strong>\r\n07212 if n\/c go to 07313\r\n07313 ...\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"The HP67 calculator has three angle modes: DEG, RAD and GRD. DEG is degrees. There are 360 degrees in a circle. RAD is radians. There are 2*PI radians (about 6.28) in a circle. GRD is gradians. I’d never heard of these before I got my original HP67 but apparently these are used in some fields … Continue reading HP67 DEG, RAD and GRD<\/span>