PROG board

Cartridge PCB which holds the P and V ROMs.

List from [MAME's source].

MVS

Name	Test	Max P ROM	Max V ROM
NPS-PRG1	[[UPD4990], BR4090, PCM
PROG-8MB
PROG-EP
PROG-G2	PCM,SNK-9201	512*2(+/?)1024
PROG-HERO
PROG-NAM
PROG16
PROG4096	PCM	2*512+1024+2048	3*2048
PROG4096B
PROG42G
PROG42G-1	PCM	128+1024	4*1024
PROG42G-COM
PROG8M42
PROGBK1
PROGBK2
PROGBK2R
PROGBK2S
PROGBK3R
PROGBK3S
PROGEOP
PROGGSC
PROGLBA
PROGTOP
PROGV
PROGMC2	PCM	1*16384	1*16384

NPS-PRG1

Neo Print cartridge. Has an UPD4990 and a BR4090 serial EEPROM.

PROGBK1

The only non-protected board that can bankswitch and use all V ROM space. Really common and very useful for homebrew stuff or converts.

P ROM

P1 can be 4Mbit, 8Mbit or 16Mbit (27C400/27C800/27C160).

• If P1 is 16Mbit then some jumper must be set (JB3? didn't look into it. see kof95) and P2 should be empty. First half of P1 is mapped to 0x200000-0x2FFFFF and second half is mapped to 0x000000-0x0FFFFFF.
• If P1 is 4Mbit or 8Mbit, then P2 can contain a bankswitched ROM (same type as P1 plus 27C322). P1 appears at 0x000000-0x0FFFFF. P2 banked rom appears in 0x200000-0x2FFFFF.

V ROM

V ROMs can be 8Mbit, 16Mbit or 32Mbit (27C800/27C160/27C322). Size of largest ROM is selected with a pair of jumpers and the other 4 should be left unconnected. 4Mbit can also be used but only if there is one ROM and only in the last used slot.

ROM size	Jumper A	Jumper B
8Mbit	JV1	JV2
16Mbit	JV3	JV4
32Mbit	JV5	JV6

Pinouts

Bankswitching is done with the LS74. It's not needed if the game isn't banked. Any write to an odd 0x200000-0x2FFFFF address will set the bank.

Cart edge	LS74	P2
A5(68k D0)	2(D1)	N/A
A6(68k D1)	12(D2)	N/A
A28(PORTWEL)	3(CLK1)	N/A
A28(PORTWEL)	11(CLK2)	N/A
N/A	5(Q1)	42(A19)
N/A	9(Q2)	32(A20)

One of 4 V ROMs is enabled with a set of LS139 outputs. The pair of V ROM jumpers effectively choose a set of 2 NEO-PCM address outputs to input to the LS139.

Jumper	LS139	V ROM
JV1	2(1A)	N/A
JV2	3(1B)	N/A
JV3	2(1A)	N/A
JV4	3(1B)	N/A
JV5	2(1A)	N/A
JV6	3(1B)	N/A
N/A	4(1Y0)	V1 13(/OE)
N/A	5(1Y1)	V2 13(/OE)
N/A	6(1Y2)	V3 13(/OE)
N/A	7(1Y3)	V4 13(/OE)

The LS08 is used to AND the two PORT /OE signals.

• 4x 1/2/4MiB V ROMs
• 1/2MiB P1 ROM
• 1/2/4MiB P2 ROM
• 2x 512KiB EP1/EP2 ROM
• NEO-PCM
• LS139,LS08,LS74

PROGBK2

Looks identical to PROGBK1 in terms of ROM layout but uses a NEO-PCM2 for encryption plus all other logic that was done with discrete chips on PROGBK1.

PROGV (Brezzasoft)

Same board manufacturer as SNK ?

• 42pin V1 and P1 ROMs (DIP or TSOP)
• 64KiB Battery-backed RAM (Mapped to $200000~?)
• External I/O port (8 ?)
• Room for 2x8DIP switchs

PROGMC2(Development Board2)

Its really from SNK ? [Billy Pit's Neo-Geo Proto Page]