Module Comparisons Third-Party Products Functional Information

Camintonn Memory

Overview

Camintonn made several memory modules for LSI-11 computers. Genuine DEC memory modules, with more than 256 KB onboard, are difficult to find and much more expensive than third-party modules. Configuration information on DEC modules, however, can be difficult to find.

The table below compares the different Camintonn modules.

Model Number CMV-250 CMV-500 CMV-254 CMV-504 CMV-1000 CMV-4000
Module Size Dual Dual Dual Dual Quad Quad
Q-bus Addressing 22-bits 22-bits 22-bits 22-bits 22-bits 22-bits
Data Width 18-bits 18-bits 18-bits 18-bits 18-bits 18-bits
RAM Type dynamic dynamic dynamic dynamic dynamic dynamic
RAM Amount 256 KB 512 KB 1 MB 2 MB 1 MB 4 MB
Technology MOS MOS MOS MOS MOS MOS
RAM Chip Size 64 Kb 64 Kb 256 Kb 256 Kb 64 Kb 256 Kb
PMI Support no no no no no no
Self Refresh yes yes yes yes yes yes
Parity yes yes yes yes yes yes
CSR yes yes yes yes yes yes
Block Mode yes yes yes yes yes yes
Battery Backup no no no no no no
AC Bus Load 1.0 1.0 1.0 1.0 2.0 2.0
DC Bus Load 1 1 1 1 1 1
+5V Load 2.0 A 2.0 A 2.0 A 2.0 A 2.8 A
+12V Load

Configuration Information

The configuration information below is what I know about the dual-width Camintonn modules. Clicking on the links increases and decreses the resolution of the jumper tables.

Starting Address: Jumpers 1-9, 15, 16

Update Starting Address Increment: 8K 16K 32K 64K 128K 256K 512K 1024K 2048K

Starting Address in 2048K Increments
Address 1 2 3 4 5 6 7 8 9 15 16
I = INSTALLED; R = REMOVED
0 KB I I I I I I I I I I R
2048 KB I I I I I I I I R R I

Ending Address: Jumpers 10-14

Update Ending Address Increment: 128K 256K 512K 1024K 2048K

Ending Address in 512K Increments
Address 10 11 12 13 14
I = INSTALLED; R = REMOVED
512 KB I I R R R
1024 KB I I I R R
1536 KB I I R I R
2048 KB I I I I R
2560 KB I I R R I
3072 KB I I I R I
3584 KB I I R I I
4096 KB I I I I I

18-bit CSR: Jumper "A" installed.
22-bit CSR: Jumper "B" installed.

CSR Parity Enabled:  Jumper "C" installed.
CSR Parity Disabled: Jumper "D" installed.

CSR Address
Address G H J
17772100 I I I
17772102 I I R
17772104 I R I
17772106 I R R
17772110 R I I
17772112 R I R
17772114 R R I
17772116 R R R

4KW I/O Page Size: Jumper "K" installed.
2KW I/O Page Size: Jumper "L" installed.

Block Mode DMA Disabled: Jumper "S" installed.
Block Mode DMA Enabled:  Jumper "T" installed.

References


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