Appendix A - Test And Operating Data; Byte Pattern For Displaying "Cosmac; Beeper Program - RCA CDP18S711 Instruction Manual

Appendix A - Test and Operating Data

Byte Pattern for Displaying "COSMAC"

The following figure shows how the word "COSMAC" would be formed by spots (or bits) on the
display screen.
The following bytes when loaded into memory will cause the word "COSMAC" to be shown on
the display in a 2048-byte RAM system. Start pattern of bytes at location OFOO in a 4096-byte
system.

Beeper Program

This machine- language program flashes the Q light and beeps at a rate determined by the byte at
location 0002. Change this byte for faster or slower rates.
0700 F9 F3 E6 CF 9F
0708 81 12 07
0710 81 13 E5 4F
0718 81 10 24
0720 F9 F3 E4 48
0728 00 00 00 00
0000 7A F8 0F BF 2F 9F 3A 04
0008 31 00 7B 30 01 00 00 00
00 00 00
C8 90 00 00 00
90 00 00 00
48 90 00 00 00
9F 00 00 00
00 00 00 00
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