Replace the ram chips and battery with battery backed sram chips (M48Z02, DS1220, etc.).
I used M48Z02 with 70 and 150ns speeds.

Remove the battery and replace all the ram chips with the nonvolatile SRAM chips, since they are all used to store data.
The existing RAM chips run off of the +5 volts after a diode.
Since the M48Z02 nonvolatile SRAM chips need > 4.75V, I had to short out the diode D1 so they get the full 5 volts.

       D1
+5V --->|--------\
            D2    \
Battery+ --->|-----\-- VCC

I created the memory map by loading in some data using the sds7 and then checking it by reading the chips with an eprom programmer.

Once I figured out the pattern, I used the eprom programmer to enter all the data (much quicker) and burned all 10 chips!

I didn't do too much verifying of the data and it looks like the selector pad plows through card #9 of kit #38!

As far as I can tell, the 15 parameters are laid end to end (0xXXX0 - 0xXXXE) x 12 cards
The addresses listed (0xXXX0) are the starting address for that kit, first card, first parameter.
All kits follow the same format, just different starting addresses

I didn't see anything really being done with the very first block of IC9 (address 0x0000 - 0x00C0).
Maybe something to do with copying? (when you select kit 0)?

	      Kit starting address
Kit 1 - IC9 - 0x00C0

	Card starting address
	0x00C0 - card #1
		Parameter address
		0x00C0 = Analog pitch
		0x00C1 = Analog bend
		0x00C2 = Analog mod
		0x00C3 = Analog level
		0x00C4 = Digital pitch
		0x00C5 = Digital bend
		0x00C6 = Digital mod
		0x00C7 = Digital level
		0x00C8 = Filter freq
		0x00C9 = Filter bend
		0x00CA = Filter res
		0x00CB = Filter decay
		0x00CC = Click
		0x00CD = Noise
		0x00CE = Speed
	0x00D0 - card #2
	0x00E0 - card #3
	0x00F0 - card #4
	0x0100 - card #5
	0x0110 - card #6
	0x0120 - card #7
	0x0130 - card #8
	0x0140 - card #9
	0x0150 - card #10
	0x0160 - card #11
	0x0170 - card #12

Kit 2 - IC9 - 0x0180
Kit 3 - IC9 - 0x0240
Kit 4 - IC9 - 0x0300
Kit 5 - IC9 - 0x03C0
Kit 6 - IC9 - 0x0480
Kit 7 - IC9 - 0x0540
Kit 8 - IC9 - 0x0600
Kit 9 - IC9 - 0x06C0

Kit 10 - IC10 - 0x0000
Kit 11 - IC10 - 0x00C0
Kit 12 - IC10 - 0x0180
Kit 13 - IC10 - 0x0240
Kit 14 - IC10 - 0x0300
Kit 15 - IC10 - 0x03C0
Kit 16 - IC10 - 0x0480
Kit 17 - IC10 - 0x0540
Kit 18 - IC10 - 0x0600
Kit 19 - IC10 - 0x06C0

Kit 20 - IC11 - 0x0000
Kit 21 - IC11 - 0x00C0
Kit 22 - IC11 - 0x0180
Kit 23 - IC11 - 0x0240
Kit 24 - IC11 - 0x0300
Kit 25 - IC11 - 0x03C0
Kit 26 - IC11 - 0x0480
Kit 27 - IC11 - 0x0540
Kit 28 - IC11 - 0x0600
Kit 29 - IC11 - 0x06C0

Kit 30 - IC12 - 0x0000
Kit 31 - IC12 - 0x00C0
Kit 32 - IC12 - 0x0180
Kit 33 - IC12 - 0x0240
Kit 34 - IC12 - 0x0300
Kit 35 - IC12 - 0x03C0
Kit 36 - IC12 - 0x0480
Kit 37 - IC12 - 0x0540
Kit 38 - IC12 - 0x0600
	0x0600 - card #1
	0x0610 - card #2
	0x0620 - card #3
	0x0630 - card #4
	0x0640 - card #5
	0x0650 - card #6
	0x0660 - card #7
	0x0670 - card #8
	0x0680 - card #9 - Selector pad stored here!
	0x0690 - card #10
	0x06A0 - card #11
	0x06B0 - card #12
Kit 39 - IC12 - 0x06C0

Kit 40 - IC13 - 0x0000
Kit 41 - IC13 - 0x00C0
Kit 42 - IC13 - 0x0180
Kit 43 - IC13 - 0x0240
Kit 44 - IC13 - 0x0300
Kit 45 - IC13 - 0x03C0
Kit 46 - IC13 - 0x0480
Kit 47 - IC13 - 0x0540
Kit 48 - IC13 - 0x0600
Kit 49 - IC13 - 0x06C0

Kit 50 - IC14 - 0x0000
Kit 51 - IC14 - 0x00C0
Kit 52 - IC14 - 0x0180
Kit 53 - IC14 - 0x0240
Kit 54 - IC14 - 0x0300
Kit 55 - IC14 - 0x03C0
Kit 56 - IC14 - 0x0480
Kit 57 - IC14 - 0x0540
Kit 58 - IC14 - 0x0600
Kit 59 - IC14 - 0x06C0

Kit 60 - IC15 - 0x0000
Kit 61 - IC15 - 0x00C0
Kit 62 - IC15 - 0x0180
Kit 63 - IC15 - 0x0240
Kit 64 - IC15 - 0x0300
Kit 65 - IC15 - 0x03C0
Kit 66 - IC15 - 0x0480
Kit 67 - IC15 - 0x0540
Kit 68 - IC15 - 0x0600
Kit 69 - IC15 - 0x06C0

Kit 70 - IC16 - 0x0000
Kit 71 - IC16 - 0x00C0
Kit 72 - IC16 - 0x0180
Kit 73 - IC16 - 0x0240
Kit 74 - IC16 - 0x0300
Kit 75 - IC16 - 0x03C0
Kit 76 - IC16 - 0x0480
Kit 77 - IC16 - 0x0540
Kit 78 - IC16 - 0x0600
Kit 79 - IC16 - 0x06C0

Kit 80 - IC17 - 0x0000
Kit 81 - IC17 - 0x00C0
Kit 82 - IC17 - 0x0180
Kit 83 - IC17 - 0x0240
Kit 84 - IC17 - 0x0300
Kit 85 - IC17 - 0x03C0
Kit 86 - IC17 - 0x0480
Kit 87 - IC17 - 0x0540
Kit 88 - IC17 - 0x0600
Kit 89 - IC17 - 0x06C0

Kit 90 - IC18 - 0x0000
Kit 91 - IC18 - 0x00C0
Kit 92 - IC18 - 0x0180
Kit 93 - IC18 - 0x0240
Kit 94 - IC18 - 0x0300
Kit 95 - IC18 - 0x03C0
Kit 96 - IC18 - 0x0480
Kit 97 - IC18 - 0x0540
Kit 98 - IC18 - 0x0600
Kit 99 - IC18 - 0x06C0

nvram.bin is a memory dump with all the kits filled in (data is from nvram.xls using the data from the _SDS7 Kits 01-39 file from yahoo groups) and selector pad set to 1-16.
Since the _SDS7 Kits 01-39 file did not include any data for channels 7-12, I just copied channels 1-6 to 7-12

To program, just grab the correct 2K chunk for the chip being programmed.

0x0000 - 0x07FF - IC9
0x0800 - 0x0FFF - IC10
0x1000 - 0x17FF - IC11
0x1800 - 0x1FFF - IC12
0x2000 - 0x27FF - IC13
0x2800 - 0x2FFF - IC14
0x3000 - 0x37FF - IC15
0x3800 - 0x3FFF - IC16
0x4000 - 0x47FF - IC17
0x4800 - 0x4FFF - IC18

Seems to be working well!
No memory loss, yet!

Doug