CMD RAMLINK PC BOARDS & CHIPS
         latest updates and corrections: 2-6-2016

        EARLY MODEL (1990), MAIN BOARD IC'S
 
ID        PART #         GENERIC IC       FUNCTION

U1      RL-701037A	GAL20V8A-25LP	 (for RTC, use RL-701037D)
U2      RL-701002A	GAL20V8A-25LP
U3      RL-701018A      GAL16V8A-25LP
U4	RL-701017A      GAL16V8A-25LP
U5	RL-701003       27512             DOS EPROM, versions 1.40, 2.00, 2.01, ETC.
U6			74LS139N
U7			74AHCT74
U8			74AHCT74N
U9			7407
U10			   N/A            BLANK SPACE
U11			D8255AC-5
U12			74LS174N
U13			6264LP-15         SRAM 
U14			74F157N
U15			74HCT193E
U16			74HC04AP
U17			74LS14	
U18                     AN7807		  3 TERMINAL REGULATOR
U19			74LS157NA
U20			   N/A		  BLANK SPACE

Q1                      2N3906            TRANSISTOR, PNP, SIGNAL
Q2                      TIP42C            TRANSISTOR, PNP, PWR, TO220
Q3                      TIP41C            TRANSISTOR, NPN, PWR, TO220


    LATE MODEL (1992), MAIN BOARD IC'S (RL version 2, SN RL001700 up)
 
ID        PART #         GENERIC IC       FUNCTION

U1      RL-701037A	GAL20V8A-25LP	 (for RTC, use RL-701037D)
U2      RL-701002A	GAL20V8A-25LP
U3      RL-701018A      GAL16V8A-25LP (ALT: RLDIRECT-A)
U4	RL-701017C      GAL16V8A-25LP
U5	RL-701003       27512             DOS EPROM, version 2.01
U6			74LS139N
U7			74HC109N
U8			74HC32BI
U9			7407
U11			D8255AC-2
U12			74LS174N
U13			HY6264P-12        SRAM 
U14			LM393N
U15			74HC14N
U16	RL-701519A      GAL16V8A-25LP
U17			74LS14
U18                     LM340TS (7805)    3 TERMINAL REGULATOR
U19			74LS157NA
U21                     LM317

Q1                      2N3906            TRANSISTOR, PNP, SIGNAL
Q2                      TIP32C            TRANSISTOR, PNP, PWR, TO220
Q3                      TIP31C            TRANSISTOR, NPN, PWR, TO220
Q4                      2N3904            TRANSISTOR, NPN, SIGNAL
Q5                      TIP32             TRANSISTOR, PNP, PWR, TO220



        EARLY SIMM BOARD (1990) IC'S (no RTC)

ID       PART #          GENERIC IC

U1                       74HCT193E
U2      RL-701102A       GAL20V8-25LP
U3                       74157
U4                       74157
U5                       74157
U6                       TMP8255AP-5
AND SIMM SOCKETS, FOUR BANKS (4X 1 Meg or 4X 4 Meg)


        LATE SIMM BOARD (1992) IC'S

ID       PART #          GENERIC IC

U1      RL701606A        GAL16V8-25LNC  (non-RTC = RL701605)
U2      RL701102B        GAL20V8-25LP
U3                       74157F
U4                       74157F
U5                       74157F
U6      HD-201010        72421B RTC  (non-RTC = no chip)
U7                       74HCT374N
U8                       74HCT374N
AND SIMM SOCKETS, FOUR BANKS (4X 1 Meg or 4X 4 Meg)