nfg.forums

Hello all!,

at last i got burn PCE Eprom,and i'm trying to connect the Eprom to the Hu card...,

but i have a problem 

some of the pins from Hu card no have the same name on the Eprom...or maybe are not on the Eprom and in reverse...

PCE:

Pin   Name   Description
1   /CD   Card Detect
2   AUDIO_IN   non utilisé
3   A18   Address 18
4   A16   Address 16
5   A15   Address 15
6   A12   Address 12
7   A7   Address 7
8   A6   Address 6
9   A5   Address 5
10   A4   Address 4
11   A3   Address 3
12   A2   Address 2
13   A1   Address 1
14   A0   Address 0
15   D0   Data 0
16   D1   Data 1
17   D2   Data 2
18   /GND   Ground
19   D3   Data 3
20   D4   Data 4
21   D5   Data 5
22   D6   Data 6
23   D7   Data 7
24   /CE   Chip Select
25   A10   Address 10
26   /OE   Output Enable
27   A11   Address 11
28   A9   Address 9
29   A8   Address 8
30   A13   Address 13
31   A14   Address 14
32   A17   Address 17
33   A19/CE   Address 19/Chip Enable
34   R/W   Read/Write
35   /HSM   High Speed Mode
36   /RESET   Reset système
37   /IRQ2   Interrupt Request 2
38   VCC   +5 VCC

this are te pins dont know how/where connect...:

1   /CD   Card Detect
26   /OE   Output Enable
33   A19/CE   Address 19/Chip Enable
34   R/W   Read/Write
35   /HSM   High Speed Mode
36   /RESET   Reset système
37   /IRQ2   Interrupt Request 2

Eprom m27c801 have two pins where not connect nothing:

"Gvpp" and "E"

¿¿¿Card Detect maybe to GND??? i'm not sure and i can't find any info ,
thanks in advance!,

Greetings

If you read the datasheet, /E is /CE (chip enable)
/GVpp is /OE (output enable)

Anything that doesn't match between the chip and system, ignore.

Except /CD - this pin should be connected to ground on the HuCard, so the system knows a card is inserted.

Whooooooooooooooooooooooooooooo!
thanks! 

but adress 19 is at same time chip enable...,¿i need wire the signals to the 2 points on the eprom? adress 19 and chip enable?,

and the pin 24 chip select is needed?

thank you very much!

/CE only becomes A19 when the HuCard is so big the PCE needs access to extra large cards.  Connect the chip's A19 pin to PCE pin 33 (/CE) and connect the chip's /CE to GND. 

This way the chip is always enabled, and A19 will only be activated when necessary.

Not luck for now,

but with this explanations i think im really close,

for now just an orange screen...  ,

I get confused a bit between  "24   /CEChip Select"      and     "33 A19/CE   Address 19/Chip Enable",

thank you very much I really appreciate the help.

Connect A19 to A19, and /CE to /CE. 

ITS ALIVE!!!! ITS ALIVE!!!!

works!,thank you very much!

i  ve done correctly yesterday,but with eprom burn with BYTE SWAP...,

byte swap is not needed...,

now i know,thank you very much,

TATSUJIN awaits me  ,

greetings!.

Weird thing!

Adventure island works great,but TATSUJIN works with deformations...,imposible to play...,

in first was think the eprom is corrup or some thing like this...,

but when i read this eprom the image is perfect working on emulator...,¿maybe a problem with BIG games?i need another config for use this kind of 1.024 kb roms?

adventure island is really little...256kb...,

thanks again from the Guy of the problems  .

Edit:

Shinobi dont work 385k

Xevious dont work 257k

W-ring works perfectly,is a 384k rom

why?

maybe some ROMS are not good for this or is needed remove some header?

Quote from: gillianx68000 on May 25, 2013, 11:58:24 PM
Weird thing!

Adventure island works great,but TATSUJIN works with deformations...,imposible to play...,

in first was think the eprom is corrup or some thing like this...,

but when i read this eprom the image is perfect working on emulator...,¿maybe a problem with BIG games?i need another config for use this kind of 1.024 kb roms?

adventure island is really little...256kb...,

thanks again from the Guy of the problems  .

Edit:

Shinobi dont work 385k

Xevious dont work 257k

W-ring works perfectly,is a 384k rom

why?

maybe some ROMS are not good for this or is needed remove some header?

Darius alpha on Supergrafx