Measurement Computing Serial488A - Manual (Page 72)

6.2
Decoding of the microprocessor address space is accomplished with a
Programmable Logic Array [U110 (16L8)]. The Memory space allocation is
Address Device Part Number Function
$0000-$7FFF
U103 58258 Static RAM
$A000-$A007 U106 9914A IEEE Controller
$A800-$A807 U105 6551 UART
$B000-$B00F U104 65B22 VIA
$B800 U201 74HCT244 SW1 (S201)
$B801 U202 74HCT244 SW2 (S202)
$B802 U203 74HCT244 SW3 (S203)
$E000-$FFFF U102 2764 Programmed EPROM