Corsham Technologies KIM Clone, User Manual

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10
Both connectors are female on the KIM Clone. EXPA has 30 connections while EXPB
has 40. The connectors are standard 2x15 or 2x20 pins with .1” (2.54mm) spacing
between pins.
EXPA is located above EXPB. The lower pins on EXPB (39 and 40) are centered 1.5”
from the bottom edge of the board. The top pins (1 and 2) are located 3.4” from the
bottom of the board. EXPA pins 29 and 30 are located 4.4” from the bottom of the
board, and pins 1 and 2 are 5.8” from the bottom. These distances will remain the
same in future versions unless there is major problem that requires changes.
EXPA Connector
Pin KIM Clone Use
1 & 2 Ground
3 & 4 +8 VDC
5 & 6 Reserved Reserved for +5 on motherboards
7 /RESET 6502 RESET line, active low
8 PH2 6502 phase 2 clock
9 PH0 6502 phase 0 clock
10 SO 6502 SO signal
11 R/W High = read, low = write
12 PH1 6502 phase 1 clock
13 /RDY
14 /IRQ
15 SYNC
16 /NMI
17 /RAM_SELECT Pull low to select RAM on KIM Clone, or pulled
low when KIM Clone RAM is
selected.
18 Reserved Reserved for motherboard use.
19 & 20 Reserved
21 – 30 Not used User-defined functionality
EXPB Connector
Pin KIM Clone Use
1 & 2 Ground
3 A15
4 A14
5 A13
6 A12
7 A11