one of several commodore scientific models made in the
between 1974 and 1976.
this model has the luxury of 48 keys and
subsequently does not require a shift key (unlike the sr-1800).
several commodore models preferred no shift or 2nd key so to
have all functions on individual buttons. this made for efficient
the usual scientific functions are all here. there is no operator
precedence between + and *, but there is for x^y. eg 1+2*3 = 9 (here) and
1+2^3 = 9. brackets seem to only work to 1 level. accuracy is quite good
(using 2 extra digits), although the machine has a noticeable delay
calculating. the display is quite good, you get 10+2.
it has two memories 1 & 2, but memory 2 is also used for series
tally, using the Xn button. pressing this accumulates the total into
also the average value can be found by swapping it with the sum using
i quite like the exponent manipulation on the top row. this scales the
exponent up and down one at a time, similar to some eng display modes but
not in multiples of 3.
a nice touch is the degrees/radians selection via d-r which
doubles as a converter. on power up the
machine is in degrees. when in
radians, a small dot is lit on screen to remind you of the mode.
battery pack is sealed inside the machine and is actually 3 rechargeable
AA cells. i much prefer the battery pack method of the sr-1800.