Apple-2-SW
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GWRAM.SYSTEM
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Add commands for RAM2GS with AGM CPLD

This commit is contained in:
Zane Kaminski 2021-04-24 03:51:07 -04:00
parent 214c3f27ea
commit c93999003d
3 changed files with 53 additions and 12 deletions
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bin/GWRAM.dbg.po
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65
ram2gs.c
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@ -9,11 +9,14 @@
#include "gwconio.h"
#include "ram2gs_asm.h"
static void ram2gs_erase() { ram2gs_cmd(0x28); }
static void ram2gs_program() { ram2gs_cmd(0x24); }
// Commands common to Altera and AGM
static void ram2gs_set4mb() { ram2gs_cmd(0x10); }
static void ram2gs_set8mb() { ram2gs_cmd(0x11); }
static void ram2gs_setnvm(char en8meg) {
// Commands for just altera
static void ram2gs_altera_erase() { ram2gs_cmd(0x28); }
static void ram2gs_altera_program() { ram2gs_cmd(0x24); }
static void ram2gs_altera_setnvm(char en8meg) {
char i;
// Clock in 0 to enable this setting entry
ram2gs_cmd(0x20);
@ -35,7 +38,44 @@ static void ram2gs_setnvm(char en8meg) {
ram2gs_cmd(0x23);
}
ram2gs_program();
ram2gs_altera_program();
}
// Commands for just AGM
static void ram2gs_agm_select() { ram2gs_cmd(0x34); }
static void ram2gs_agm_deselect() { ram2gs_cmd(0x30); }
static void ram2gs_agm_tx8(char data) {
char i;
for (i = 0; i < 8; i++) {
ram2gs_cmd(0x34 + ((data >> (7-i)) & 1));
ram2gs_cmd(0x36 + ((data >> (7-i)) & 1));
}
}
static void ram2gs_agm_write_en() {
ram2gs_agm_deselect();
ram2gs_agm_select();
ram2gs_agm_tx8(0x06); // 0x06 is write enable
ram2gs_agm_deselect();
}
static void ram2gs_agm_erase() {
ram2gs_agm_write_en();
ram2gs_agm_select();
ram2gs_agm_tx8(0x20); // 0x20 is sector erase (4 kB)
ram2gs_agm_tx8(0x00); // address[23:16]
ram2gs_agm_tx8(0x10); // address[15:8]
ram2gs_agm_tx8(0x00); // address[7:0]
ram2gs_agm_deselect();
}
static void ram2gs_agm_write_nvm(char en8meg) {
ram2gs_agm_write_en();
ram2gs_agm_select();
ram2gs_agm_tx8(0x02); // 0x02 is page (byte) program
ram2gs_agm_tx8(0x00); // address[23:16]
ram2gs_agm_tx8(0x10); // address[15:8]
ram2gs_agm_tx8(0x00); // address[7:0]
if (en8meg) { ram2gs_agm_tx8(0xFF); } // data[7:0]
else { ram2gs_agm_tx8(0x00); } // data[7:0]
ram2gs_agm_deselect();
}
static void menu(void)
@ -102,11 +142,11 @@ int ram2gs_main(void)
gwcputsxy(1, 8, "Resetting RAM2GS settings.");
gwcputsxy(1, 9, "Do not turn off your Apple.");
ram2gs_erase(); // Erase RAM2GS settings memory
ram2gs_set8mb(); // Enable 8 megabytes now
// Wait for >= 500ms on even the fastest systems.
spin(32, 8);
// Erase RAM2GS settings memory
ram2gs_altera_erase(); // Erase for Altera CPLD
ram2gs_agm_erase(); // Erase for AGM CPLD
spin(32, 8); // Wait for >= 500ms on even the fastest systems.
ram2gs_set8mb(); // Enable 8 megabytes now (default)
// Show success message and quit
clrscr(); // Clear screen
@ -130,9 +170,10 @@ int ram2gs_main(void)
gwcputsxy(1, 8, "Saving RAM2GS capacity setting.");
gwcputsxy(1, 9, "Do not turn off your Apple.");
// Save capacity in nonvolatile memory.
ram2gs_setnvm(en8meg);
// Wait for >= 500ms on even the fastest systems.
spin(33, 8);
ram2gs_altera_setnvm(en8meg); // Save for Altera CPLD
ram2gs_agm_erase(); // Erase for AGM CPLD
spin(33, 8); // Wait for >= 500ms on even the fastest systems.
ram2gs_agm_write_nvm(en8meg); // Write for AGM CPLD
// Print success message
clrscr(); // Clear screen
gwcputsxy(1, 8, "RAM2GS capacity saved successfully.");