DSP-1

Command ($308000 - $3FBFFF / $B08000 - $BFBFFF in Mode 20, $006000 - $0F6FFF / $806000 - $8F6FFF if Mode 21, RW)
7  bit  0 (Write)
---- ----
CCCC CCCC
|||| ||||
++++-++++- Command / Parameters

7  bit  0 (Read)
---- ----
RRRR RRRR
|||| ||||
++++-++++- Command Result

Status ($30C000 - $3FFFFF / $B0C000 - $BFFFFF in Mode 20, $007000 - $0F7FFF / $807000 - $8F7FFF if Mode 21, R)
7  bit  0
---- ----
R... ....
|
+--------- Data Request (0 = DSP Busy; 1 = Ready for R/W)

Data Types:

Caption text

Name	Description	Bits	Data Range	Unit
A	Angle	8	-180° -> 180°	2pi/2^16
T	Fixed Point Decimal	16	-1.0 -> 0.999969...	2^-15
I8	Int with Decimal (Fixed)	16	-128.0 -> 127.996039...	2^-8
I	Integer	16	-32768 -> 32767	1
2I	Double Int	17	-65536 -> 65534	2
CI	Cyclic Int	16	-32768 -> 32767, Loops	1
U	Unsigned Int	16	0 -> 65535	1
D	Double Prec Int	32	-2147483648 -> 2147483647	1
L	Low Word of Double	16	---	---
H	High Word of Double	16	---	---
D2	Double Prec Half Int	32	-1073741824 -> 1073741823	2^-1
L2	Low Word of Double Half	16	---	---
H2	High Word of Double Half	16	---	---
M	Float Coefficient	16	-1.0 -> 0.999969...	1
C	Float Exponent	16	-32768 -> 32767	1

Commands:

Caption text

Name	Opcode (Hex)	Inputs (In Order)	Outputs (In Order)	Equation	Command Cycles	Input Cycles	Output Cycles	Description
16 bit Multiply	$00	T/I, T/I	T/H2	I1 * I2 = O1	6	12, 4	4	Multiplies two Values. Product is Rounded to <= 15 bits
Float Inverse	$10	M, C	M, C	1 / I1 * 2^I2 = O1 * 2^O2	6	12, 73	2, 4	Calculate the inverse of a Floating Point number
Triangle	$04	A, T/I	T/I, T/I	O2 = I2 * cos(I1), O1 = I2 * sin(I1)	6	12, 24	3, 4	Calculate the Sine of an Angle (I1) and Radius (I2) and the Product of the Cosine and Radius
Radius	$08	I, I, I	L2, H2	I1² + I2² + I3² = Ox	6	14, 4, 4	2, 4	Caculate the Vector Size
Range	$18	T/I, T/I, T/I, T/I	T/H2	I1² + I2² + I3² - I4² = O	6	12, 4, 4, 8	4	Subtract the Square of the Specified Range from the Vector Size
Distance	$28	I/T, I/T, I/T	I/T	sqrt(I1² + I2² + I3²) = O	6	15, 4, 127	4	Calculate the Vector SIze (Abs)
Rotate	$0C	A , I , I	I , I	(I2, I3) [cos(I1) - sin(I1), sin(I1) cos(I1) = O1, O2	6	12, 3, 37	2, 4	Calculate XY Coordinate (O1 & O2) after rotating XY (I2 & I3) with I1 (Z Axis, Counterclockwise)
Polar	$1C	A, A, A, I, I, I	I, I, I	(I4, I5, I6) * [cos(I3) 0 sin(I3), 0 1 0, -sin(I3) 0 cos(I3)] * [1 0 0, 0 cos(I2) -sin(I2), 0 sin(I2) cos(I2] * [cos(I1) -sin(I1) 0, sin(I1) cos(I1) 0, 0 0 1] = (O1, O2, O3)	6	13, 3, 2, 2, 2, 107	6, 2, 4	3D Rotation. Coord In: XYZ (I4, I5, I6) Angle In: XYZ (I1, I2, I3) Coord Out: XYZ (O1, O2, O3)