[Coco] CoCo1 Rev E 64K Upgrade by Kitsz

[theother_bob]

For the sake of a quick reply I am typing in the relevant portion of the article so you don't have to wait for me to set up my manual scanner. This is from The Color Computer Magazine, Oct. 1983, Custom Color by Dennis Kitsz, pp31-48 (wow! a mini-mag in itself, covering the lowerkit, 64k upgrades for all models up to NC board and installing aftermarket keyboards in the CoCo.)
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   64K Upgrade, Radio Shack style--Rev.E. Needed: screwdriver to open the case, snips, solder and iron, thin wire, eight 64K RAMs (type 4164/4864).
 
   1. Unplug and open the computer
   2. Remove the RF interference shield by cutting the white plastic straps and working the cover around the edges.
   3. Move four jumpers (one between U4 and U8, and three above the keyboard connector) up and over to the 32K position.
   4. Move the remaining umper (below C44) up and over to the 16/32K position.
   5. Solder or jumper together the two LO staking pins next to U29.
   7. Carefully remove U29 from its socket, and bend pins 4, 5 and 6 up and parallel to its body.
   8. Remove U11 from its socket, and bend pin 5 up and parallel to its body.
   9. Replace U29 and U11 in their sockets, except for the pins noted.
   10. Connect three wires: from U29 pin 6 to U29 pin 8; from U29 pin 4 to U11 pin 5; from U29 pin 5 to TP1.
   11. Clip out capacitors C61, C31, C64, C35, C67, C45, C70 and C48.
   12. Remove the eight 4K or 16K memory chips U20 through U27.
   13. Install eight 64K memory chips, pointing in the same direction.
   14. Restore the interference shield and press it down, replace the cover, and power up.
   15. PRINT MEM should reveal a 32K machine.