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EPROMEmu-1
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1mbit fixes, tweaks

This commit is contained in:
Brian Peek 2022-01-02 22:18:38 -07:00
parent d867c4584e
commit 5cb2704908
2 changed files with 15 additions and 9 deletions
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schematic/epromemu-backups/epromemu-2022-01-02_173738.zip Normal file
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24
src/main.cpp
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@ -33,6 +33,10 @@ void readFile()
}
}
while(read != 0);
// on GG (and lynx?) top address bit gets stuck high (?) so mirror to upper region too?
if(total == 131072)
memcpy(p, buffer, 131072);
}
void setPinMode(int32_t* pins, int32_t direction)
@ -52,19 +56,21 @@ void setup()
void loop()
{
// read address pins
uint32_t io6 = GPIO6_DR;
uint32_t addr = (((io6 >> 16) & 0xFFFF) | ((io6 & 0x3000) << 4));
// get byte
char b = buffer[addr];
// set data pins
uint32_t outb = 0;
uint8_t ce = digitalReadFast(cePin);
if(!ce)
outb = ((b & 0x0F) << 0) | ((b & 0xF0) << 12);
{
// read address pins
uint32_t addr = (((io6 >> 16) & 0xFFFF) | ((io6 & 0x3000) << 4));
// get byte at addr
char b = buffer[addr];
// set data pins
outb = ((b & 0x0F) << 0) | ((b & 0xF0) << 12);
}
GPIO7_DR = outb;