Applix 1616 programmable logic - video

PAL16R8 (IC5) video logic

      VPAL
15 MHz --> 1 PAL
 16R8 
20 VCC  
EN640 --> 2 19 --> ENPAL --> IC3 pin 10
DISP --> 3 18 --> VIDEO_CLK (7.5 MHz) --> ?
IC31 pin 13 (IC60 pin 9) --> VD1 --> 4 17 --> T1 --> IC4 pin 4 = RB
A5 --> 5 16 --> T0 --> IC4 pin 5 = RA
BC3 --> 6 15 --> RED --> IC3 pin 3
BC2 --> 7 14 --> GREEN --> IC3 pin 4
BC1 --> 8 13 --> BLUE --> IC3 pin 7
BC0 --> 9 12 --> INTENSITY --> IC3 pin 9
  GND 10 11 <-- OE = GND

T1,T0 are the logical pixel value (0 to 4)

RB,R0 are the read address of the palette RAM.

WB,W0 are the write address of the palette RAM.

VHDL description

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CUPL description

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