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Merge pull request #4511 from jriwanek-forks/emswork

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Improvements to the RAMpage XT and EMS logging
This commit is contained in:
Miran Grča
2024-06-03 07:14:50 +02:00
committed by GitHub
parent 27248397d2 99957425f0
commit bfaff911c8
1 changed files with 31 additions and 29 deletions
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60
src/device/isamem.c
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@@ -315,9 +315,7 @@ ems_read(uint16_t port, void *priv)
break;
}
#if ISAMEM_DEBUG
isamem_log("ISAMEM: read(%04x) = %02x)\n", port, ret);
#endif
isamem_log("ISAMEM: read(%04x) = %02x) page=%d\n", port, ret, vpage);
return ret;
}
@@ -333,12 +331,13 @@ consecutive_ems_read(uint16_t port, void *priv)
/* Get the viewport page number. */
vpage = (port - dev->base_addr);
isamem_log("ISAMEM: read(%04x) = %02x) page=%d\n", port, ret, vpage);
ret = dev->ems[vpage].page;
if (dev->ems[vpage].enabled)
ret |= 0x80;
isamem_log("ISAMEM: read(%04x) = %02x) page=%d\n", port, ret, vpage);
return ret;
}
@@ -353,12 +352,10 @@ ems_write(uint16_t port, uint8_t val, void *priv)
vpage = (port / EMS_PGSIZE);
port &= (EMS_PGSIZE - 1);
#if ISAMEM_DEBUG
isamem_log("ISAMEM: write(%04x, %02x) page=%d\n", port, val, vpage);
#endif
switch (port - dev->base_addr) {
case 0x0000: /* page mapping registers */
isamem_log("ISAMEM: write(%04x, %02x) to page mapping registers! page=%d\n", port, val, vpage);
/* Set the page number. */
dev->ems[vpage].enabled = (val & 0x80);
dev->ems[vpage].page = (val & 0x7f);
@@ -385,6 +382,8 @@ ems_write(uint16_t port, uint8_t val, void *priv)
break;
case 0x0001: /* page frame registers */
isamem_log("ISAMEM: write(%04x, %02x) to page frame registers! page=%d\n", port, val, vpage);
/*
* The EV-159 EMM driver configures the frame address
* by setting bits in these registers. The information
@@ -403,7 +402,6 @@ ems_write(uint16_t port, uint8_t val, void *priv)
* 80 c0 e0 DC000
* 80 c0 e0 E0000
*/
isamem_log("EMS: write(%02x) to register 1 !\n");
dev->ems[vpage].frame = val;
dev->frame_addr = 0x000c4000 + ((((dev->ems[2].frame & 0x80) >> 5) ||
((dev->ems[1].frame & 0x80) >> 6) ||
@@ -429,9 +427,8 @@ consecutive_ems_write(uint16_t port, uint8_t val, void *priv)
/* Get the viewport page number. */
vpage = (port - dev->base_addr);
isamem_log("ISAMEM: write(%04x, %02x) page=%d\n", port, val, vpage);
isamem_log("ISAMEM: write(%04x, %02x) to page mapping registers! (page=%d)\n", port, val, vpage);
isamem_log("EMS: write(%02x) to register 0! (%02x)\n", val);
/* Set the page number. */
dev->ems[vpage].enabled = 1;
dev->ems[vpage].page = val;
@@ -532,6 +529,14 @@ isamem_init(const device_t *info)
break;
case ISAMEM_RAMPAGEXT_CARD: /* AST RAMpage/XT */
dev->base_addr = device_get_config_hex16("base");
dev->total_size = device_get_config_int("size");
dev->start_addr = device_get_config_int("start");
tot = dev->total_size;
dev->flags |= FLAG_EMS;
dev->frame_addr = 0xE0000;
break;
case ISAMEM_ABOVEBOARD_CARD: /* Intel AboveBoard */
case ISAMEM_BRAT_CARD: /* BocaRAM/AT */
dev->base_addr = device_get_config_hex16("base");
@@ -1673,7 +1678,7 @@ static const device_config_t rampage_config[] = {
.description = "Address",
.type = CONFIG_HEX16,
.default_string = "",
.default_int = 0x0258,
.default_int = 0x0218,
.file_filter = "",
.spinner = { 0 },
.selection = {
@@ -1687,22 +1692,6 @@ static const device_config_t rampage_config[] = {
{ .description = "" }
},
},
{
.name = "frame",
.description = "Frame Address",
.type = CONFIG_HEX20,
.default_string = "",
.default_int = 0,
.file_filter = "",
.spinner = { 0 },
.selection = {
{ .description = "Disabled", .value = 0x00000 },
{ .description = "C000H", .value = 0xC0000 },
{ .description = "D000H", .value = 0xD0000 },
{ .description = "E000H", .value = 0xE0000 },
{ .description = "" }
},
},
{
.name = "size",
.description = "Memory Size",
@@ -1717,6 +1706,19 @@ static const device_config_t rampage_config[] = {
},
.selection = { { 0 } }
},
{
.name = "start",
.description = "Start Address",
.type = CONFIG_SPINNER,
.default_string = "",
.default_int = 640,
.file_filter = "",
.spinner = {
.min = 0,
.max = 640,
.step = 64
},
},
{ .name = "", .description = "", .type = CONFIG_END }
// clang-format on
};