Macintosh-HW/BlueSCSI
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Move the db_bsrr table to RAM for faster performance.

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Glenn Anderson 2022-03-16 13:21:10 -07:00
parent d6ffe45554
commit 1f6410fdc2
1 changed files with 7 additions and 7 deletions
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14
src/BlueSCSI.cpp
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@ -217,14 +217,9 @@ byte m_msb[256]; // Command storage bytes
// Set DBP, set REQ = inactive
#define DBP(D) ((((((uint32_t)(D)<<8)|PTY(D))*0x00010001)^0x0000ff01)|BITMASK(vREQ))
#define DBP8(D) DBP(D),DBP(D+1),DBP(D+2),DBP(D+3),DBP(D+4),DBP(D+5),DBP(D+6),DBP(D+7)
#define DBP32(D) DBP8(D),DBP8(D+8),DBP8(D+16),DBP8(D+24)
// BSRR register control value that simultaneously performs DB set, DP set, and REQ = H (inactrive)
static const uint32_t db_bsrr[256]={
DBP32(0x00),DBP32(0x20),DBP32(0x40),DBP32(0x60),
DBP32(0x80),DBP32(0xA0),DBP32(0xC0),DBP32(0xE0)
};
uint32_t db_bsrr[256];
// Parity bit acquisition
#define PARITY(DB) (db_bsrr[DB]&1)
@ -383,6 +378,11 @@ void setup()
// JTAG Because it is used for debugging.
disableDebugPorts();
// Setup BSRR table
for (unsigned i = 0; i <= 255; i++) {
db_bsrr[i] = DBP(i);
}
// Serial initialization
#if DEBUG > 0
Serial.begin(9600);