AMT-Cheif
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EPROMEmu-1
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v2 changes (no more ce/pgm pins)

This commit is contained in:
Brian Peek 2022-07-05 21:50:29 -07:00
parent 47a04300dd
commit dd83387795
1 changed files with 12 additions and 14 deletions
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26
src/main.cpp
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@ -6,13 +6,15 @@
// PROGMEM
#define ROM_BUFFER_LEN (256*1024)
DMAMEM char buffer[ROM_BUFFER_LEN];
char buffer[ROM_BUFFER_LEN];
int32_t inPins[] = { 19,18,14,15,40,41,17,16,22,23,20,21,38,39,26,27,24,25,30,31,-1 };
// v1 uses 30/31
int32_t inPins[] = { 19,18,14,15,40,41,17,16,22,23,20,21,38,39,26,27,24,25,/*30,31,*/-1 };
int32_t outPins[] = { 10,12,11,13,8,7,36,37,-1 };
int32_t cePin = 30;
int32_t pgmPin = 31;
// v1
//int32_t cePin = 30;
//int32_t pgmPin = 31;
void readFile()
{
@ -62,19 +64,15 @@ void loop()
{
uint32_t io6 = GPIO6_DR;
uint32_t outb = 0;
uint8_t ce = digitalReadFast(cePin);
if(!ce)
{
// read address pins
uint32_t addr = (((io6 >> 16) & 0xFFFF) | ((io6 & 0x3000) << 4));
// read address pins
uint32_t addr = ((io6 >> 16) & 0xFFFF) | ((io6 & 0x3000) << 4);
// get byte at addr
char b = buffer[addr];
// get byte at addr
char b = buffer[addr];
// set data pins
outb = ((b & 0x0F) << 0) | ((b & 0xF0) << 12);
}
// set data pins
outb = ((b & 0x0F) << 0) | ((b & 0xF0) << 12);
GPIO7_DR = outb;